Pass the directio request on pageio_init to clean up the API.
Percolate pg_dreq from original nfs_pageio_descriptor to the
pnfs_{read,write}_done_resend_to_mds and use it on respective
call to nfs_pageio_init_{read,write} on the newly created
nfs_pageio_descriptor.
Reproduced by:
Server: linux-pnfs pnfs-all-3.7 42aba94
Client: linux-nfs/bugfixes 666b3d8
Command:
# mount -o minorversion=1 server:/ /mnt
# dd bs=128k count=8 if=/dev/zero of=/mnt/dd.out oflag=direct
BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
IP: [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
PGD 34786067 PUD 34794067 PMD 0
Oops: 0002 [#1] SMP
Modules linked in: nfs_layout_nfsv41_files nfsv4 nfs nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc btrfs zlib_deflate libcrc32c ipv6 autofs4
CPU 1
Pid: 259, comm: kworker/1:2 Not tainted 3.8.0-rc6 #2 Bochs Bochs
RIP: 0010:[<ffffffffa021a3a8>] [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
RSP: 0018:ffff880038f8fa68 EFLAGS: 00010206
RAX: ffffffffa021a6a9 RBX: ffff880038f8fb48 RCX: 00000000000a0000
RDX: ffffffffa021e616 RSI: ffff8800385e9a40 RDI: 0000000000000028
RBP: ffff880038f8fa68 R08: ffffffff81ad6720 R09: ffff8800385e9510
R10: ffffffffa0228450 R11: ffff880038e87418 R12: ffff8800385e9a40
R13: ffff8800385e9a70 R14: ffff880038f8fb38 R15: ffffffffa0148878
FS: 0000000000000000(0000) GS:ffff88003e400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000028 CR3: 0000000034789000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process kworker/1:2 (pid: 259, threadinfo ffff880038f8e000, task ffff880038302480)
Stack:
ffff880038f8fa78 ffffffffa021a6bf ffff880038f8fa88 ffffffffa021bb82
ffff880038f8fae8 ffffffffa021f454 ffff880038f8fae8 ffffffff8109689d
ffff880038f8fab8 ffffffff00000006 0000000000000000 ffff880038f8fb48
Call Trace:
[<ffffffffa021a6bf>] nfs_direct_pgio_init+0x16/0x18 [nfs]
[<ffffffffa021bb82>] nfs_pgheader_init+0x6a/0x6c [nfs]
[<ffffffffa021f454>] nfs_generic_pg_writepages+0x51/0xf8 [nfs]
[<ffffffff8109689d>] ? mark_held_locks+0x71/0x99
[<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
[<ffffffffa021bc25>] nfs_pageio_doio+0x1a/0x43 [nfs]
[<ffffffffa021be7c>] nfs_pageio_complete+0x16/0x2c [nfs]
[<ffffffffa02608be>] pnfs_write_done_resend_to_mds+0x95/0xc5 [nfsv4]
[<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
[<ffffffffa028e27f>] filelayout_reset_write+0x8c/0x99 [nfs_layout_nfsv41_files]
[<ffffffffa028e5f9>] filelayout_write_done_cb+0x4d/0xc1 [nfs_layout_nfsv41_files]
[<ffffffffa024587a>] nfs4_write_done+0x36/0x49 [nfsv4]
[<ffffffffa021f996>] nfs_writeback_done+0x53/0x1cc [nfs]
[<ffffffffa021fb1d>] nfs_writeback_done_common+0xe/0x10 [nfs]
[<ffffffffa028e03d>] filelayout_write_call_done+0x28/0x2a [nfs_layout_nfsv41_files]
[<ffffffffa01488a1>] rpc_exit_task+0x29/0x87 [sunrpc]
[<ffffffffa014a0c9>] __rpc_execute+0x11d/0x3cc [sunrpc]
[<ffffffff810969dc>] ? trace_hardirqs_on_caller+0x117/0x173
[<ffffffffa014a39f>] rpc_async_schedule+0x27/0x32 [sunrpc]
[<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
[<ffffffff8105f8c1>] process_one_work+0x226/0x422
[<ffffffff8105f7f4>] ? process_one_work+0x159/0x422
[<ffffffff81094757>] ? lock_acquired+0x210/0x249
[<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
[<ffffffff810600d8>] worker_thread+0x126/0x1c4
[<ffffffff8105ffb2>] ? manage_workers+0x240/0x240
[<ffffffff81064ef8>] kthread+0xb1/0xb9
[<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
[<ffffffff815206ec>] ret_from_fork+0x7c/0xb0
[<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
Code: 00 83 38 02 74 12 48 81 4b 50 00 00 01 00 c7 83 60 07 00 00 01 00 00 00 48 89 df e8 55 fe ff ff 5b 41 5c 5d c3 66 90 55 48 89 e5 <f0> ff 07 5d c3 55 48 89 e5 f0 ff 0f 0f 94 c0 84 c0 0f 95 c0 0f
RIP [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
RSP <ffff880038f8fa68>
CR2: 0000000000000028
Cc: Since 3.6 <[email protected]>
Signed-off-by: Benny Halevy <[email protected]>
---
fs/nfs/direct.c | 9 +++------
fs/nfs/internal.h | 6 ++++--
fs/nfs/nfs4filelayout.c | 6 ++++--
fs/nfs/pagelist.c | 5 +++--
fs/nfs/pnfs.c | 30 ++++++++++++++++++------------
fs/nfs/pnfs.h | 12 ++++++++----
fs/nfs/read.c | 9 +++++----
fs/nfs/write.c | 10 ++++++----
include/linux/nfs_page.h | 3 ++-
include/linux/nfs_xdr.h | 6 ++++--
10 files changed, 57 insertions(+), 39 deletions(-)
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 0bd7a55..fc0ce02 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -409,9 +409,8 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
unsigned long seg;
NFS_PROTO(dreq->inode)->read_pageio_init(&desc, dreq->inode,
- &nfs_direct_read_completion_ops);
+ &nfs_direct_read_completion_ops, dreq);
get_dreq(dreq);
- desc.pg_dreq = dreq;
for (seg = 0; seg < nr_segs; seg++) {
const struct iovec *vec = &iov[seg];
@@ -499,8 +498,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
get_dreq(dreq);
NFS_PROTO(dreq->inode)->write_pageio_init(&desc, dreq->inode, FLUSH_STABLE,
- &nfs_direct_write_completion_ops);
- desc.pg_dreq = dreq;
+ &nfs_direct_write_completion_ops, dreq);
list_for_each_entry_safe(req, tmp, &reqs, wb_list) {
if (!nfs_pageio_add_request(&desc, req)) {
@@ -811,8 +809,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
unsigned long seg;
NFS_PROTO(inode)->write_pageio_init(&desc, inode, FLUSH_COND_STABLE,
- &nfs_direct_write_completion_ops);
- desc.pg_dreq = dreq;
+ &nfs_direct_write_completion_ops, dreq);
get_dreq(dreq);
atomic_inc(&inode->i_dio_count);
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 541c9eb..c42fd4d 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -356,7 +356,8 @@ extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
struct inode *inode,
- const struct nfs_pgio_completion_ops *compl_ops);
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq);
extern int nfs_initiate_read(struct rpc_clnt *clnt,
struct nfs_read_data *data,
const struct rpc_call_ops *call_ops, int flags);
@@ -380,7 +381,8 @@ extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
/* write.c */
extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags,
- const struct nfs_pgio_completion_ops *compl_ops);
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq);
extern struct nfs_write_header *nfs_writehdr_alloc(void);
extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 194c484..49eeb04 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -99,7 +99,8 @@ static void filelayout_reset_write(struct nfs_write_data *data)
task->tk_status = pnfs_write_done_resend_to_mds(hdr->inode,
&hdr->pages,
- hdr->completion_ops);
+ hdr->completion_ops,
+ hdr->dreq);
}
}
@@ -119,7 +120,8 @@ static void filelayout_reset_read(struct nfs_read_data *data)
task->tk_status = pnfs_read_done_resend_to_mds(hdr->inode,
&hdr->pages,
- hdr->completion_ops);
+ hdr->completion_ops,
+ hdr->dreq);
}
}
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index e56e846..11d0b70 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -255,7 +255,8 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
const struct nfs_pageio_ops *pg_ops,
const struct nfs_pgio_completion_ops *compl_ops,
size_t bsize,
- int io_flags)
+ int io_flags,
+ struct nfs_direct_req *dreq)
{
INIT_LIST_HEAD(&desc->pg_list);
desc->pg_bytes_written = 0;
@@ -270,7 +271,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
desc->pg_ioflags = io_flags;
desc->pg_error = 0;
desc->pg_lseg = NULL;
- desc->pg_dreq = NULL;
+ desc->pg_dreq = dreq;
desc->pg_layout_private = NULL;
}
EXPORT_SYMBOL_GPL(nfs_pageio_init);
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 6be70f6..e1ccc62 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1369,29 +1369,31 @@ struct pnfs_layout_segment *
void
pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode,
- const struct nfs_pgio_completion_ops *compl_ops)
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq)
{
struct nfs_server *server = NFS_SERVER(inode);
struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld;
if (ld == NULL)
- nfs_pageio_init_read(pgio, inode, compl_ops);
+ nfs_pageio_init_read(pgio, inode, compl_ops, dreq);
else
- nfs_pageio_init(pgio, inode, ld->pg_read_ops, compl_ops, server->rsize, 0);
+ nfs_pageio_init(pgio, inode, ld->pg_read_ops, compl_ops, server->rsize, 0, dreq);
}
void
pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode,
int ioflags,
- const struct nfs_pgio_completion_ops *compl_ops)
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq)
{
struct nfs_server *server = NFS_SERVER(inode);
struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld;
if (ld == NULL)
- nfs_pageio_init_write(pgio, inode, ioflags, compl_ops);
+ nfs_pageio_init_write(pgio, inode, ioflags, compl_ops, dreq);
else
- nfs_pageio_init(pgio, inode, ld->pg_write_ops, compl_ops, server->wsize, ioflags);
+ nfs_pageio_init(pgio, inode, ld->pg_write_ops, compl_ops, server->wsize, ioflags, dreq);
}
bool
@@ -1422,13 +1424,14 @@ struct pnfs_layout_segment *
int pnfs_write_done_resend_to_mds(struct inode *inode,
struct list_head *head,
- const struct nfs_pgio_completion_ops *compl_ops)
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq)
{
struct nfs_pageio_descriptor pgio;
LIST_HEAD(failed);
/* Resend all requests through the MDS */
- nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, compl_ops);
+ nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, compl_ops, dreq);
while (!list_empty(head)) {
struct nfs_page *req = nfs_list_entry(head->next);
@@ -1463,7 +1466,8 @@ static void pnfs_ld_handle_write_error(struct nfs_write_data *data)
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags))
data->task.tk_status = pnfs_write_done_resend_to_mds(hdr->inode,
&hdr->pages,
- hdr->completion_ops);
+ hdr->completion_ops,
+ hdr->dreq);
}
/*
@@ -1578,13 +1582,14 @@ static void pnfs_writehdr_free(struct nfs_pgio_header *hdr)
int pnfs_read_done_resend_to_mds(struct inode *inode,
struct list_head *head,
- const struct nfs_pgio_completion_ops *compl_ops)
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq)
{
struct nfs_pageio_descriptor pgio;
LIST_HEAD(failed);
/* Resend all requests through the MDS */
- nfs_pageio_init_read(&pgio, inode, compl_ops);
+ nfs_pageio_init_read(&pgio, inode, compl_ops, dreq);
while (!list_empty(head)) {
struct nfs_page *req = nfs_list_entry(head->next);
@@ -1615,7 +1620,8 @@ static void pnfs_ld_handle_read_error(struct nfs_read_data *data)
if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags))
data->task.tk_status = pnfs_read_done_resend_to_mds(hdr->inode,
&hdr->pages,
- hdr->completion_ops);
+ hdr->completion_ops,
+ hdr->dreq);
}
/*
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 97cb358..0a616e9 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -179,9 +179,11 @@ extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
void pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *,
- const struct nfs_pgio_completion_ops *);
+ const struct nfs_pgio_completion_ops *,
+ struct nfs_direct_req *dreq);
void pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *,
- int, const struct nfs_pgio_completion_ops *);
+ int, const struct nfs_pgio_completion_ops *,
+ struct nfs_direct_req *dreq);
void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
void unset_pnfs_layoutdriver(struct nfs_server *);
@@ -230,9 +232,11 @@ struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head,
- const struct nfs_pgio_completion_ops *compl_ops);
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq);
int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
- const struct nfs_pgio_completion_ops *compl_ops);
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq);
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
/* nfs4_deviceid_flags */
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index a5e5d98..5b6a44d 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -115,10 +115,11 @@ int nfs_return_empty_page(struct page *page)
void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
struct inode *inode,
- const struct nfs_pgio_completion_ops *compl_ops)
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq)
{
nfs_pageio_init(pgio, inode, &nfs_pageio_read_ops, compl_ops,
- NFS_SERVER(inode)->rsize, 0);
+ NFS_SERVER(inode)->rsize, 0, dreq);
}
EXPORT_SYMBOL_GPL(nfs_pageio_init_read);
@@ -147,7 +148,7 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
if (len < PAGE_CACHE_SIZE)
zero_user_segment(page, len, PAGE_CACHE_SIZE);
- NFS_PROTO(inode)->read_pageio_init(&pgio, inode, &nfs_async_read_completion_ops);
+ NFS_PROTO(inode)->read_pageio_init(&pgio, inode, &nfs_async_read_completion_ops, NULL);
nfs_pageio_add_request(&pgio, new);
nfs_pageio_complete(&pgio);
NFS_I(inode)->read_io += pgio.pg_bytes_written;
@@ -651,7 +652,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
if (ret == 0)
goto read_complete; /* all pages were read */
- NFS_PROTO(inode)->read_pageio_init(&pgio, inode, &nfs_async_read_completion_ops);
+ NFS_PROTO(inode)->read_pageio_init(&pgio, inode, &nfs_async_read_completion_ops, NULL);
ret = read_cache_pages(mapping, pages, readpage_async_filler, &desc);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index c483cc5..068e394 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -355,7 +355,8 @@ static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc
NFS_PROTO(page_file_mapping(page)->host)->write_pageio_init(&pgio,
page->mapping->host,
wb_priority(wbc),
- &nfs_async_write_completion_ops);
+ &nfs_async_write_completion_ops,
+ NULL);
err = nfs_do_writepage(page, wbc, &pgio);
nfs_pageio_complete(&pgio);
if (err < 0)
@@ -398,7 +399,7 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc)
nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES);
- NFS_PROTO(inode)->write_pageio_init(&pgio, inode, wb_priority(wbc), &nfs_async_write_completion_ops);
+ NFS_PROTO(inode)->write_pageio_init(&pgio, inode, wb_priority(wbc), &nfs_async_write_completion_ops, NULL);
err = write_cache_pages(mapping, wbc, nfs_writepages_callback, &pgio);
nfs_pageio_complete(&pgio);
@@ -1232,10 +1233,11 @@ static int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags,
- const struct nfs_pgio_completion_ops *compl_ops)
+ const struct nfs_pgio_completion_ops *compl_ops,
+ struct nfs_direct_req *dreq)
{
nfs_pageio_init(pgio, inode, &nfs_pageio_write_ops, compl_ops,
- NFS_SERVER(inode)->wsize, ioflags);
+ NFS_SERVER(inode)->wsize, ioflags, dreq);
}
EXPORT_SYMBOL_GPL(nfs_pageio_init_write);
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 92ce578..dd2b5c0 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -87,7 +87,8 @@ extern void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
const struct nfs_pageio_ops *pg_ops,
const struct nfs_pgio_completion_ops *compl_ops,
size_t bsize,
- int how);
+ int how,
+ struct nfs_direct_req *dreq);
extern int nfs_pageio_add_request(struct nfs_pageio_descriptor *,
struct nfs_page *);
extern void nfs_pageio_complete(struct nfs_pageio_descriptor *desc);
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 29adb12..2cb8b4b 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1414,12 +1414,14 @@ struct nfs_rpc_ops {
int (*decode_dirent)(struct xdr_stream *, struct nfs_entry *, int);
void (*read_setup) (struct nfs_read_data *, struct rpc_message *);
void (*read_pageio_init)(struct nfs_pageio_descriptor *, struct inode *,
- const struct nfs_pgio_completion_ops *);
+ const struct nfs_pgio_completion_ops *,
+ struct nfs_direct_req *dreq);
void (*read_rpc_prepare)(struct rpc_task *, struct nfs_read_data *);
int (*read_done) (struct rpc_task *, struct nfs_read_data *);
void (*write_setup) (struct nfs_write_data *, struct rpc_message *);
void (*write_pageio_init)(struct nfs_pageio_descriptor *, struct inode *, int,
- const struct nfs_pgio_completion_ops *);
+ const struct nfs_pgio_completion_ops *,
+ struct nfs_direct_req *dreq);
void (*write_rpc_prepare)(struct rpc_task *, struct nfs_write_data *);
int (*write_done) (struct rpc_task *, struct nfs_write_data *);
void (*commit_setup) (struct nfs_commit_data *, struct rpc_message *);
--
1.7.11.7
On 2013-02-24 17:09, Myklebust, Trond wrote:
> On Sun, 2013-02-24 at 15:35 +0200, Benny Halevy wrote:
>> Pass the directio request on pageio_init to clean up the API.
>>
>> Percolate pg_dreq from original nfs_pageio_descriptor to the
>> pnfs_{read,write}_done_resend_to_mds and use it on respective
>> call to nfs_pageio_init_{read,write} on the newly created
>> nfs_pageio_descriptor.
>>
>> Reproduced by:
>>
>> Server: linux-pnfs pnfs-all-3.7 42aba94
>>
>> Client: linux-nfs/bugfixes 666b3d8
>>
>> Command:
>> # mount -o minorversion=1 server:/ /mnt
>> # dd bs=128k count=8 if=/dev/zero of=/mnt/dd.out oflag=direct
>>
>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
>> IP: [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
>> PGD 34786067 PUD 34794067 PMD 0
>> Oops: 0002 [#1] SMP
>> Modules linked in: nfs_layout_nfsv41_files nfsv4 nfs nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc btrfs zlib_deflate libcrc32c ipv6 autofs4
>> CPU 1
>> Pid: 259, comm: kworker/1:2 Not tainted 3.8.0-rc6 #2 Bochs Bochs
>> RIP: 0010:[<ffffffffa021a3a8>] [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
>> RSP: 0018:ffff880038f8fa68 EFLAGS: 00010206
>> RAX: ffffffffa021a6a9 RBX: ffff880038f8fb48 RCX: 00000000000a0000
>> RDX: ffffffffa021e616 RSI: ffff8800385e9a40 RDI: 0000000000000028
>> RBP: ffff880038f8fa68 R08: ffffffff81ad6720 R09: ffff8800385e9510
>> R10: ffffffffa0228450 R11: ffff880038e87418 R12: ffff8800385e9a40
>> R13: ffff8800385e9a70 R14: ffff880038f8fb38 R15: ffffffffa0148878
>> FS: 0000000000000000(0000) GS:ffff88003e400000(0000) knlGS:0000000000000000
>> CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>> CR2: 0000000000000028 CR3: 0000000034789000 CR4: 00000000000006e0
>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
>> Process kworker/1:2 (pid: 259, threadinfo ffff880038f8e000, task ffff880038302480)
>> Stack:
>> ffff880038f8fa78 ffffffffa021a6bf ffff880038f8fa88 ffffffffa021bb82
>> ffff880038f8fae8 ffffffffa021f454 ffff880038f8fae8 ffffffff8109689d
>> ffff880038f8fab8 ffffffff00000006 0000000000000000 ffff880038f8fb48
>> Call Trace:
>> [<ffffffffa021a6bf>] nfs_direct_pgio_init+0x16/0x18 [nfs]
>> [<ffffffffa021bb82>] nfs_pgheader_init+0x6a/0x6c [nfs]
>> [<ffffffffa021f454>] nfs_generic_pg_writepages+0x51/0xf8 [nfs]
>> [<ffffffff8109689d>] ? mark_held_locks+0x71/0x99
>> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
>> [<ffffffffa021bc25>] nfs_pageio_doio+0x1a/0x43 [nfs]
>> [<ffffffffa021be7c>] nfs_pageio_complete+0x16/0x2c [nfs]
>> [<ffffffffa02608be>] pnfs_write_done_resend_to_mds+0x95/0xc5 [nfsv4]
>> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
>> [<ffffffffa028e27f>] filelayout_reset_write+0x8c/0x99 [nfs_layout_nfsv41_files]
>> [<ffffffffa028e5f9>] filelayout_write_done_cb+0x4d/0xc1 [nfs_layout_nfsv41_files]
>> [<ffffffffa024587a>] nfs4_write_done+0x36/0x49 [nfsv4]
>> [<ffffffffa021f996>] nfs_writeback_done+0x53/0x1cc [nfs]
>> [<ffffffffa021fb1d>] nfs_writeback_done_common+0xe/0x10 [nfs]
>> [<ffffffffa028e03d>] filelayout_write_call_done+0x28/0x2a [nfs_layout_nfsv41_files]
>> [<ffffffffa01488a1>] rpc_exit_task+0x29/0x87 [sunrpc]
>> [<ffffffffa014a0c9>] __rpc_execute+0x11d/0x3cc [sunrpc]
>> [<ffffffff810969dc>] ? trace_hardirqs_on_caller+0x117/0x173
>> [<ffffffffa014a39f>] rpc_async_schedule+0x27/0x32 [sunrpc]
>> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
>> [<ffffffff8105f8c1>] process_one_work+0x226/0x422
>> [<ffffffff8105f7f4>] ? process_one_work+0x159/0x422
>> [<ffffffff81094757>] ? lock_acquired+0x210/0x249
>> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
>> [<ffffffff810600d8>] worker_thread+0x126/0x1c4
>> [<ffffffff8105ffb2>] ? manage_workers+0x240/0x240
>> [<ffffffff81064ef8>] kthread+0xb1/0xb9
>> [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
>> [<ffffffff815206ec>] ret_from_fork+0x7c/0xb0
>> [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
>> Code: 00 83 38 02 74 12 48 81 4b 50 00 00 01 00 c7 83 60 07 00 00 01 00 00 00 48 89 df e8 55 fe ff ff 5b 41 5c 5d c3 66 90 55 48 89 e5 <f0> ff 07 5d c3 55 48 89 e5 f0 ff 0f 0f 94 c0 84 c0 0f 95 c0 0f
>> RIP [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
>> RSP <ffff880038f8fa68>
>> CR2: 0000000000000028
>>
>> Cc: Since 3.6 <[email protected]>
>> Signed-off-by: Benny Halevy <[email protected]>
>> ---
>> fs/nfs/direct.c | 9 +++------
>> fs/nfs/internal.h | 6 ++++--
>> fs/nfs/nfs4filelayout.c | 6 ++++--
>> fs/nfs/pagelist.c | 5 +++--
>> fs/nfs/pnfs.c | 30 ++++++++++++++++++------------
>> fs/nfs/pnfs.h | 12 ++++++++----
>> fs/nfs/read.c | 9 +++++----
>> fs/nfs/write.c | 10 ++++++----
>> include/linux/nfs_page.h | 3 ++-
>> include/linux/nfs_xdr.h | 6 ++++--
>> 10 files changed, 57 insertions(+), 39 deletions(-)
>>
>
> Hi Benny,
>
> Can we please trim away the cleanups if this is a stable patch? As far
> as I can see, we can achieve the same result without having to propagate
> the dreq argument all the way to nfs_pageio_init.
>
> How about the following?
Looks good.
Testing...
Benny
>
> Cheers
> Trond
>
> -----Original Message-----
> From: Benny Halevy [mailto:[email protected]]
> Sent: Monday, February 25, 2013 5:30 AM
> To: Myklebust, Trond
> Cc: [email protected]
> Subject: Re: [PATCH] pnfs: fix resend_to_mds for directio
>
> On 2013-02-25 12:19, Benny Halevy wrote:
> > On 2013-02-24 17:09, Myklebust, Trond wrote:
> >> On Sun, 2013-02-24 at 15:35 +0200, Benny Halevy wrote:
> >>> Pass the directio request on pageio_init to clean up the API.
> >>>
> >>> Percolate pg_dreq from original nfs_pageio_descriptor to the
> >>> pnfs_{read,write}_done_resend_to_mds and use it on respective call
> >>> to nfs_pageio_init_{read,write} on the newly created
> >>> nfs_pageio_descriptor.
> >>>
> >>> Reproduced by:
> >>>
> >>> Server: linux-pnfs pnfs-all-3.7 42aba94
> >>>
> >>> Client: linux-nfs/bugfixes 666b3d8
> >>>
> >>> Command:
> >>> # mount -o minorversion=1 server:/ /mnt # dd bs=128k count=8
> >>> if=/dev/zero of=/mnt/dd.out oflag=direct
> >>>
> >>> BUG: unable to handle kernel NULL pointer dereference at
> >>> 0000000000000028
> >>> IP: [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs] PGD 34786067 PUD
> >>> 34794067 PMD 0
> >>> Oops: 0002 [#1] SMP
> >>> Modules linked in: nfs_layout_nfsv41_files nfsv4 nfs nfsd lockd
> >>> nfs_acl auth_rpcgss exportfs sunrpc btrfs zlib_deflate libcrc32c
> >>> ipv6 autofs4 CPU 1
> >>> Pid: 259, comm: kworker/1:2 Not tainted 3.8.0-rc6 #2 Bochs Bochs
> >>> RIP: 0010:[<ffffffffa021a3a8>] [<ffffffffa021a3a8>]
> >>> atomic_inc+0x4/0x9 [nfs]
> >>> RSP: 0018:ffff880038f8fa68 EFLAGS: 00010206
> >>> RAX: ffffffffa021a6a9 RBX: ffff880038f8fb48 RCX: 00000000000a0000
> >>> RDX: ffffffffa021e616 RSI: ffff8800385e9a40 RDI: 0000000000000028
> >>> RBP: ffff880038f8fa68 R08: ffffffff81ad6720 R09: ffff8800385e9510
> >>> R10: ffffffffa0228450 R11: ffff880038e87418 R12: ffff8800385e9a40
> >>> R13: ffff8800385e9a70 R14: ffff880038f8fb38 R15: ffffffffa0148878
> >>> FS: 0000000000000000(0000) GS:ffff88003e400000(0000)
> >>> knlGS:0000000000000000
> >>> CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> >>> CR2: 0000000000000028 CR3: 0000000034789000 CR4: 00000000000006e0
> >>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> >>> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> >>> Process kworker/1:2 (pid: 259, threadinfo ffff880038f8e000, task
> >>> ffff880038302480)
> >>> Stack:
> >>> ffff880038f8fa78 ffffffffa021a6bf ffff880038f8fa88 ffffffffa021bb82
> >>> ffff880038f8fae8 ffffffffa021f454 ffff880038f8fae8 ffffffff8109689d
> >>> ffff880038f8fab8 ffffffff00000006 0000000000000000 ffff880038f8fb48
> >>> Call Trace:
> >>> [<ffffffffa021a6bf>] nfs_direct_pgio_init+0x16/0x18 [nfs]
> >>> [<ffffffffa021bb82>] nfs_pgheader_init+0x6a/0x6c [nfs]
> >>> [<ffffffffa021f454>] nfs_generic_pg_writepages+0x51/0xf8 [nfs]
> >>> [<ffffffff8109689d>] ? mark_held_locks+0x71/0x99
> >>> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
> >>> [<ffffffffa021bc25>] nfs_pageio_doio+0x1a/0x43 [nfs]
> >>> [<ffffffffa021be7c>] nfs_pageio_complete+0x16/0x2c [nfs]
> >>> [<ffffffffa02608be>] pnfs_write_done_resend_to_mds+0x95/0xc5
> [nfsv4]
> >>> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
> >>> [<ffffffffa028e27f>] filelayout_reset_write+0x8c/0x99
> >>> [nfs_layout_nfsv41_files] [<ffffffffa028e5f9>]
> >>> filelayout_write_done_cb+0x4d/0xc1 [nfs_layout_nfsv41_files]
> >>> [<ffffffffa024587a>] nfs4_write_done+0x36/0x49 [nfsv4]
> >>> [<ffffffffa021f996>] nfs_writeback_done+0x53/0x1cc [nfs]
> >>> [<ffffffffa021fb1d>] nfs_writeback_done_common+0xe/0x10 [nfs]
> >>> [<ffffffffa028e03d>] filelayout_write_call_done+0x28/0x2a
> >>> [nfs_layout_nfsv41_files] [<ffffffffa01488a1>]
> >>> rpc_exit_task+0x29/0x87 [sunrpc] [<ffffffffa014a0c9>]
> >>> __rpc_execute+0x11d/0x3cc [sunrpc] [<ffffffff810969dc>] ?
> >>> trace_hardirqs_on_caller+0x117/0x173
> >>> [<ffffffffa014a39f>] rpc_async_schedule+0x27/0x32 [sunrpc]
> >>> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
> >>> [<ffffffff8105f8c1>] process_one_work+0x226/0x422
> >>> [<ffffffff8105f7f4>] ? process_one_work+0x159/0x422
> >>> [<ffffffff81094757>] ? lock_acquired+0x210/0x249
> >>> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
> >>> [<ffffffff810600d8>] worker_thread+0x126/0x1c4 [<ffffffff8105ffb2>]
> >>> ? manage_workers+0x240/0x240 [<ffffffff81064ef8>]
> kthread+0xb1/0xb9
> >>> [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
> >>> [<ffffffff815206ec>] ret_from_fork+0x7c/0xb0 [<ffffffff81064e47>] ?
> >>> __kthread_parkme+0x65/0x65
> >>> Code: 00 83 38 02 74 12 48 81 4b 50 00 00 01 00 c7 83 60 07 00 00 01
> >>> 00 00 00 48 89 df e8 55 fe ff ff 5b 41 5c 5d c3 66 90 55 48 89 e5
> >>> <f0> ff 07 5d c3 55 48 89 e5 f0 ff 0f 0f 94 c0 84 c0 0f 95 c0 0f RIP
> >>> [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs] RSP
> >>> <ffff880038f8fa68>
> >>> CR2: 0000000000000028
> >>>
> >>> Cc: Since 3.6 <[email protected]>
> >>> Signed-off-by: Benny Halevy <[email protected]>
> >>> ---
> >>> fs/nfs/direct.c | 9 +++------
> >>> fs/nfs/internal.h | 6 ++++--
> >>> fs/nfs/nfs4filelayout.c | 6 ++++--
> >>> fs/nfs/pagelist.c | 5 +++--
> >>> fs/nfs/pnfs.c | 30 ++++++++++++++++++------------
> >>> fs/nfs/pnfs.h | 12 ++++++++----
> >>> fs/nfs/read.c | 9 +++++----
> >>> fs/nfs/write.c | 10 ++++++----
> >>> include/linux/nfs_page.h | 3 ++-
> >>> include/linux/nfs_xdr.h | 6 ++++--
> >>> 10 files changed, 57 insertions(+), 39 deletions(-)
> >>>
> >>
> >> Hi Benny,
> >>
> >> Can we please trim away the cleanups if this is a stable patch? As
> >> far as I can see, we can achieve the same result without having to
> >> propagate the dreq argument all the way to nfs_pageio_init.
> >>
> >> How about the following?
> >
> > Looks good.
> > Testing...
>
> Passed :)
>
Thank you Benny! I'll push it to the cthon testing branch...
Cheers
Trond
On Sun, 2013-02-24 at 15:35 +0200, Benny Halevy wrote:
> Pass the directio request on pageio_init to clean up the API.
>
> Percolate pg_dreq from original nfs_pageio_descriptor to the
> pnfs_{read,write}_done_resend_to_mds and use it on respective
> call to nfs_pageio_init_{read,write} on the newly created
> nfs_pageio_descriptor.
>
> Reproduced by:
>
> Server: linux-pnfs pnfs-all-3.7 42aba94
>
> Client: linux-nfs/bugfixes 666b3d8
>
> Command:
> # mount -o minorversion=1 server:/ /mnt
> # dd bs=128k count=8 if=/dev/zero of=/mnt/dd.out oflag=direct
>
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
> IP: [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
> PGD 34786067 PUD 34794067 PMD 0
> Oops: 0002 [#1] SMP
> Modules linked in: nfs_layout_nfsv41_files nfsv4 nfs nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc btrfs zlib_deflate libcrc32c ipv6 autofs4
> CPU 1
> Pid: 259, comm: kworker/1:2 Not tainted 3.8.0-rc6 #2 Bochs Bochs
> RIP: 0010:[<ffffffffa021a3a8>] [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
> RSP: 0018:ffff880038f8fa68 EFLAGS: 00010206
> RAX: ffffffffa021a6a9 RBX: ffff880038f8fb48 RCX: 00000000000a0000
> RDX: ffffffffa021e616 RSI: ffff8800385e9a40 RDI: 0000000000000028
> RBP: ffff880038f8fa68 R08: ffffffff81ad6720 R09: ffff8800385e9510
> R10: ffffffffa0228450 R11: ffff880038e87418 R12: ffff8800385e9a40
> R13: ffff8800385e9a70 R14: ffff880038f8fb38 R15: ffffffffa0148878
> FS: 0000000000000000(0000) GS:ffff88003e400000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 0000000000000028 CR3: 0000000034789000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process kworker/1:2 (pid: 259, threadinfo ffff880038f8e000, task ffff880038302480)
> Stack:
> ffff880038f8fa78 ffffffffa021a6bf ffff880038f8fa88 ffffffffa021bb82
> ffff880038f8fae8 ffffffffa021f454 ffff880038f8fae8 ffffffff8109689d
> ffff880038f8fab8 ffffffff00000006 0000000000000000 ffff880038f8fb48
> Call Trace:
> [<ffffffffa021a6bf>] nfs_direct_pgio_init+0x16/0x18 [nfs]
> [<ffffffffa021bb82>] nfs_pgheader_init+0x6a/0x6c [nfs]
> [<ffffffffa021f454>] nfs_generic_pg_writepages+0x51/0xf8 [nfs]
> [<ffffffff8109689d>] ? mark_held_locks+0x71/0x99
> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
> [<ffffffffa021bc25>] nfs_pageio_doio+0x1a/0x43 [nfs]
> [<ffffffffa021be7c>] nfs_pageio_complete+0x16/0x2c [nfs]
> [<ffffffffa02608be>] pnfs_write_done_resend_to_mds+0x95/0xc5 [nfsv4]
> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
> [<ffffffffa028e27f>] filelayout_reset_write+0x8c/0x99 [nfs_layout_nfsv41_files]
> [<ffffffffa028e5f9>] filelayout_write_done_cb+0x4d/0xc1 [nfs_layout_nfsv41_files]
> [<ffffffffa024587a>] nfs4_write_done+0x36/0x49 [nfsv4]
> [<ffffffffa021f996>] nfs_writeback_done+0x53/0x1cc [nfs]
> [<ffffffffa021fb1d>] nfs_writeback_done_common+0xe/0x10 [nfs]
> [<ffffffffa028e03d>] filelayout_write_call_done+0x28/0x2a [nfs_layout_nfsv41_files]
> [<ffffffffa01488a1>] rpc_exit_task+0x29/0x87 [sunrpc]
> [<ffffffffa014a0c9>] __rpc_execute+0x11d/0x3cc [sunrpc]
> [<ffffffff810969dc>] ? trace_hardirqs_on_caller+0x117/0x173
> [<ffffffffa014a39f>] rpc_async_schedule+0x27/0x32 [sunrpc]
> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
> [<ffffffff8105f8c1>] process_one_work+0x226/0x422
> [<ffffffff8105f7f4>] ? process_one_work+0x159/0x422
> [<ffffffff81094757>] ? lock_acquired+0x210/0x249
> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
> [<ffffffff810600d8>] worker_thread+0x126/0x1c4
> [<ffffffff8105ffb2>] ? manage_workers+0x240/0x240
> [<ffffffff81064ef8>] kthread+0xb1/0xb9
> [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
> [<ffffffff815206ec>] ret_from_fork+0x7c/0xb0
> [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
> Code: 00 83 38 02 74 12 48 81 4b 50 00 00 01 00 c7 83 60 07 00 00 01 00 00 00 48 89 df e8 55 fe ff ff 5b 41 5c 5d c3 66 90 55 48 89 e5 <f0> ff 07 5d c3 55 48 89 e5 f0 ff 0f 0f 94 c0 84 c0 0f 95 c0 0f
> RIP [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
> RSP <ffff880038f8fa68>
> CR2: 0000000000000028
>
> Cc: Since 3.6 <[email protected]>
> Signed-off-by: Benny Halevy <[email protected]>
> ---
> fs/nfs/direct.c | 9 +++------
> fs/nfs/internal.h | 6 ++++--
> fs/nfs/nfs4filelayout.c | 6 ++++--
> fs/nfs/pagelist.c | 5 +++--
> fs/nfs/pnfs.c | 30 ++++++++++++++++++------------
> fs/nfs/pnfs.h | 12 ++++++++----
> fs/nfs/read.c | 9 +++++----
> fs/nfs/write.c | 10 ++++++----
> include/linux/nfs_page.h | 3 ++-
> include/linux/nfs_xdr.h | 6 ++++--
> 10 files changed, 57 insertions(+), 39 deletions(-)
>
Hi Benny,
Can we please trim away the cleanups if this is a stable patch? As far
as I can see, we can achieve the same result without having to propagate
the dreq argument all the way to nfs_pageio_init.
How about the following?
Cheers
Trond
--
Trond Myklebust
Linux NFS client maintainer
NetApp
[email protected]
http://www.netapp.com
On 2013-02-25 12:19, Benny Halevy wrote:
> On 2013-02-24 17:09, Myklebust, Trond wrote:
>> On Sun, 2013-02-24 at 15:35 +0200, Benny Halevy wrote:
>>> Pass the directio request on pageio_init to clean up the API.
>>>
>>> Percolate pg_dreq from original nfs_pageio_descriptor to the
>>> pnfs_{read,write}_done_resend_to_mds and use it on respective
>>> call to nfs_pageio_init_{read,write} on the newly created
>>> nfs_pageio_descriptor.
>>>
>>> Reproduced by:
>>>
>>> Server: linux-pnfs pnfs-all-3.7 42aba94
>>>
>>> Client: linux-nfs/bugfixes 666b3d8
>>>
>>> Command:
>>> # mount -o minorversion=1 server:/ /mnt
>>> # dd bs=128k count=8 if=/dev/zero of=/mnt/dd.out oflag=direct
>>>
>>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
>>> IP: [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
>>> PGD 34786067 PUD 34794067 PMD 0
>>> Oops: 0002 [#1] SMP
>>> Modules linked in: nfs_layout_nfsv41_files nfsv4 nfs nfsd lockd nfs_acl auth_rpcgss exportfs sunrpc btrfs zlib_deflate libcrc32c ipv6 autofs4
>>> CPU 1
>>> Pid: 259, comm: kworker/1:2 Not tainted 3.8.0-rc6 #2 Bochs Bochs
>>> RIP: 0010:[<ffffffffa021a3a8>] [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
>>> RSP: 0018:ffff880038f8fa68 EFLAGS: 00010206
>>> RAX: ffffffffa021a6a9 RBX: ffff880038f8fb48 RCX: 00000000000a0000
>>> RDX: ffffffffa021e616 RSI: ffff8800385e9a40 RDI: 0000000000000028
>>> RBP: ffff880038f8fa68 R08: ffffffff81ad6720 R09: ffff8800385e9510
>>> R10: ffffffffa0228450 R11: ffff880038e87418 R12: ffff8800385e9a40
>>> R13: ffff8800385e9a70 R14: ffff880038f8fb38 R15: ffffffffa0148878
>>> FS: 0000000000000000(0000) GS:ffff88003e400000(0000) knlGS:0000000000000000
>>> CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>>> CR2: 0000000000000028 CR3: 0000000034789000 CR4: 00000000000006e0
>>> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>>> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
>>> Process kworker/1:2 (pid: 259, threadinfo ffff880038f8e000, task ffff880038302480)
>>> Stack:
>>> ffff880038f8fa78 ffffffffa021a6bf ffff880038f8fa88 ffffffffa021bb82
>>> ffff880038f8fae8 ffffffffa021f454 ffff880038f8fae8 ffffffff8109689d
>>> ffff880038f8fab8 ffffffff00000006 0000000000000000 ffff880038f8fb48
>>> Call Trace:
>>> [<ffffffffa021a6bf>] nfs_direct_pgio_init+0x16/0x18 [nfs]
>>> [<ffffffffa021bb82>] nfs_pgheader_init+0x6a/0x6c [nfs]
>>> [<ffffffffa021f454>] nfs_generic_pg_writepages+0x51/0xf8 [nfs]
>>> [<ffffffff8109689d>] ? mark_held_locks+0x71/0x99
>>> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
>>> [<ffffffffa021bc25>] nfs_pageio_doio+0x1a/0x43 [nfs]
>>> [<ffffffffa021be7c>] nfs_pageio_complete+0x16/0x2c [nfs]
>>> [<ffffffffa02608be>] pnfs_write_done_resend_to_mds+0x95/0xc5 [nfsv4]
>>> [<ffffffffa0148878>] ? rpc_release_resources_task+0x37/0x37 [sunrpc]
>>> [<ffffffffa028e27f>] filelayout_reset_write+0x8c/0x99 [nfs_layout_nfsv41_files]
>>> [<ffffffffa028e5f9>] filelayout_write_done_cb+0x4d/0xc1 [nfs_layout_nfsv41_files]
>>> [<ffffffffa024587a>] nfs4_write_done+0x36/0x49 [nfsv4]
>>> [<ffffffffa021f996>] nfs_writeback_done+0x53/0x1cc [nfs]
>>> [<ffffffffa021fb1d>] nfs_writeback_done_common+0xe/0x10 [nfs]
>>> [<ffffffffa028e03d>] filelayout_write_call_done+0x28/0x2a [nfs_layout_nfsv41_files]
>>> [<ffffffffa01488a1>] rpc_exit_task+0x29/0x87 [sunrpc]
>>> [<ffffffffa014a0c9>] __rpc_execute+0x11d/0x3cc [sunrpc]
>>> [<ffffffff810969dc>] ? trace_hardirqs_on_caller+0x117/0x173
>>> [<ffffffffa014a39f>] rpc_async_schedule+0x27/0x32 [sunrpc]
>>> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
>>> [<ffffffff8105f8c1>] process_one_work+0x226/0x422
>>> [<ffffffff8105f7f4>] ? process_one_work+0x159/0x422
>>> [<ffffffff81094757>] ? lock_acquired+0x210/0x249
>>> [<ffffffffa014a378>] ? __rpc_execute+0x3cc/0x3cc [sunrpc]
>>> [<ffffffff810600d8>] worker_thread+0x126/0x1c4
>>> [<ffffffff8105ffb2>] ? manage_workers+0x240/0x240
>>> [<ffffffff81064ef8>] kthread+0xb1/0xb9
>>> [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
>>> [<ffffffff815206ec>] ret_from_fork+0x7c/0xb0
>>> [<ffffffff81064e47>] ? __kthread_parkme+0x65/0x65
>>> Code: 00 83 38 02 74 12 48 81 4b 50 00 00 01 00 c7 83 60 07 00 00 01 00 00 00 48 89 df e8 55 fe ff ff 5b 41 5c 5d c3 66 90 55 48 89 e5 <f0> ff 07 5d c3 55 48 89 e5 f0 ff 0f 0f 94 c0 84 c0 0f 95 c0 0f
>>> RIP [<ffffffffa021a3a8>] atomic_inc+0x4/0x9 [nfs]
>>> RSP <ffff880038f8fa68>
>>> CR2: 0000000000000028
>>>
>>> Cc: Since 3.6 <[email protected]>
>>> Signed-off-by: Benny Halevy <[email protected]>
>>> ---
>>> fs/nfs/direct.c | 9 +++------
>>> fs/nfs/internal.h | 6 ++++--
>>> fs/nfs/nfs4filelayout.c | 6 ++++--
>>> fs/nfs/pagelist.c | 5 +++--
>>> fs/nfs/pnfs.c | 30 ++++++++++++++++++------------
>>> fs/nfs/pnfs.h | 12 ++++++++----
>>> fs/nfs/read.c | 9 +++++----
>>> fs/nfs/write.c | 10 ++++++----
>>> include/linux/nfs_page.h | 3 ++-
>>> include/linux/nfs_xdr.h | 6 ++++--
>>> 10 files changed, 57 insertions(+), 39 deletions(-)
>>>
>>
>> Hi Benny,
>>
>> Can we please trim away the cleanups if this is a stable patch? As far
>> as I can see, we can achieve the same result without having to propagate
>> the dreq argument all the way to nfs_pageio_init.
>>
>> How about the following?
>
> Looks good.
> Testing...
Passed :)
>
> Benny
>
>>
>> Cheers
>> Trond
>>