Hi!
This patch adds a new per-node PageMetadata field to
/sys/devices/system/node/nodeN/meminfo and a global PageMetadata field
to /proc/meminfo. This information can be used by users to see how much
memory is being used by per-page metadata, which can vary depending on
build configuration, machine architecture, and system use.
Per-page metadata is the amount of memory that Linux needs in order to
manage memory at the page granularity. The majority of such memory is
used by "struct page" and "page_ext" data structures.
Background
----------
Kernel overhead observability is missing some of the largest
allocations during runtime, including vmemmap (struct pages) and
page_ext. This patch aims to address this problem by exporting a
new metric PageMetadata.
On the contrary, the kernel does provide observibility for boot memory
allocations. For example, the metric reserved_pages depicts the pages
allocated by the bootmem allocator. This can be simply calculated as
present_pages - managed_pages, which are both exported in /proc/zoneinfo.
The metric reserved_pages is primarily composed of struct pages and
page_ext.
What about the struct pages (allocated by bootmem allocator) that are
free'd during hugetlbfs allocations and then allocated by buddy-allocator
once hugtlbfs pages are free'd?
/proc/meminfo MemTotal changes: MemTotal does not include memblock
allocations but includes buddy allocations. However, during runtime
memblock allocations can be shifted into buddy allocations, and therefore
become part of MemTotal.
Once the struct pages get allocated by buddy allocator, we lose track of
these struct page allocations overhead accounting. Therefore, we must
export a new metric that we shall refer to as PageMetadata (exported by
node). This shall also comprise the struct page and page_ext allocations
made during runtime.
Results and analysis
--------------------
Memory model: Sparsemem-vmemmap
$ echo 1 > /proc/sys/vm/hugetlb_optimize_vmemmap
$ cat /proc/meminfo | grep MemTotal
MemTotal: 32918196 kB
$ cat /proc/meminfo | grep Meta
PageMetadata: 589824 kB
$ cat /sys/devices/system/node/node0/meminfo | grep Meta
Node 0 PageMetadata: 294912 kB
$ cat /sys/devices/system/node/node1/meminfo | grep Meta
Node 1 PageMetadata: 294912 kB
AFTER HUGTLBFS RESERVATION
$ echo 512 > /proc/sys/vm/nr_hugepages
$ cat /proc/meminfo | grep MemTotal
MemTotal: 32934580 kB
$ cat /proc/meminfo | grep Meta
PageMetadata: 575488 kB
$ cat /sys/devices/system/node/node0/meminfo | grep Meta
Node 0 PageMetadata: 287744 kB
$ cat /sys/devices/system/node/node1/meminfo | grep Meta
Node 1 PageMetadata: 287744 kB
AFTER FREEING HUGTLBFS RESERVATION
$ echo 0 > /proc/sys/vm/nr_hugepages
$ cat /proc/meminfo | grep MemTotal
MemTotal: 32934580 kB
$ cat /proc/meminfo | grep Meta
PageMetadata: 589824 kB
$ cat /sys/devices/system/node/node0/meminfo | grep Meta
Node 0 PageMetadata: 294912 kB
$ cat /sys/devices/system/node/node1/meminfo | grep Meta
Node 1 PageMetadata: 294912 kB
Sourav Panda (1):
mm: report per-page metadata information
Documentation/filesystems/proc.rst | 3 +++
drivers/base/node.c | 2 ++
fs/proc/meminfo.c | 7 +++++++
include/linux/mmzone.h | 3 +++
include/linux/vmstat.h | 4 ++++
mm/hugetlb.c | 8 +++++++-
mm/hugetlb_vmemmap.c | 9 ++++++++-
mm/mm_init.c | 3 +++
mm/page_alloc.c | 1 +
mm/page_ext.c | 17 +++++++++++++----
mm/sparse-vmemmap.c | 3 +++
mm/sparse.c | 7 ++++++-
mm/vmstat.c | 21 +++++++++++++++++++++
13 files changed, 81 insertions(+), 7 deletions(-)
--
2.42.0.283.g2d96d420d3-goog
Adds a new per-node PageMetadata field to
/sys/devices/system/node/nodeN/meminfo
and a global PageMetadata field to /proc/meminfo. This information can
be used by users to see how much memory is being used by per-page
metadata, which can vary depending on build configuration, machine
architecture, and system use.
Per-page metadata is the amount of memory that Linux needs in order to
manage memory at the page granularity. The majority of such memory is
used by "struct page" and "page_ext" data structures.
This memory depends on build configurations, machine architectures, and
the way system is used:
Build configuration may include extra fields into "struct page",
and enable / disable "page_ext"
Machine architecture defines base page sizes. For example 4K x86,
8K SPARC, 64K ARM64 (optionally), etc. The per-page metadata
overhead is smaller on machines with larger page sizes.
System use can change per-page overhead by using vmemmap
optimizations with hugetlb pages, and emulated pmem devdax pages.
Also, boot parameters can determine whether page_ext is needed
to be allocated. This memory can be part of MemTotal or be outside
MemTotal depending on whether the memory was hot-plugged, booted with,
or hugetlb memory was returned back to the system.
Suggested-by: Pasha Tatashin <[email protected]>
Signed-off-by: Sourav Panda <[email protected]>
---
Documentation/filesystems/proc.rst | 3 +++
drivers/base/node.c | 2 ++
fs/proc/meminfo.c | 7 +++++++
include/linux/mmzone.h | 3 +++
include/linux/vmstat.h | 4 ++++
mm/hugetlb.c | 8 +++++++-
mm/hugetlb_vmemmap.c | 9 ++++++++-
mm/mm_init.c | 3 +++
mm/page_alloc.c | 1 +
mm/page_ext.c | 17 +++++++++++++----
mm/sparse-vmemmap.c | 3 +++
mm/sparse.c | 7 ++++++-
mm/vmstat.c | 21 +++++++++++++++++++++
13 files changed, 81 insertions(+), 7 deletions(-)
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index 2b59cff8be17..c121f2ef9432 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -987,6 +987,7 @@ Example output. You may not have all of these fields.
AnonPages: 4654780 kB
Mapped: 266244 kB
Shmem: 9976 kB
+ PageMetadata: 513419 kB
KReclaimable: 517708 kB
Slab: 660044 kB
SReclaimable: 517708 kB
@@ -1089,6 +1090,8 @@ Mapped
files which have been mmapped, such as libraries
Shmem
Total memory used by shared memory (shmem) and tmpfs
+PageMetadata
+ Memory used for per-page metadata
KReclaimable
Kernel allocations that the kernel will attempt to reclaim
under memory pressure. Includes SReclaimable (below), and other
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 493d533f8375..da728542265f 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -428,6 +428,7 @@ static ssize_t node_read_meminfo(struct device *dev,
"Node %d Mapped: %8lu kB\n"
"Node %d AnonPages: %8lu kB\n"
"Node %d Shmem: %8lu kB\n"
+ "Node %d PageMetadata: %8lu kB\n"
"Node %d KernelStack: %8lu kB\n"
#ifdef CONFIG_SHADOW_CALL_STACK
"Node %d ShadowCallStack:%8lu kB\n"
@@ -458,6 +459,7 @@ static ssize_t node_read_meminfo(struct device *dev,
nid, K(node_page_state(pgdat, NR_FILE_MAPPED)),
nid, K(node_page_state(pgdat, NR_ANON_MAPPED)),
nid, K(i.sharedram),
+ nid, K(node_page_state(pgdat, NR_PAGE_METADATA)),
nid, node_page_state(pgdat, NR_KERNEL_STACK_KB),
#ifdef CONFIG_SHADOW_CALL_STACK
nid, node_page_state(pgdat, NR_KERNEL_SCS_KB),
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 45af9a989d40..f141bb2a550d 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -39,7 +39,9 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
long available;
unsigned long pages[NR_LRU_LISTS];
unsigned long sreclaimable, sunreclaim;
+ unsigned long nr_page_metadata;
int lru;
+ int nid;
si_meminfo(&i);
si_swapinfo(&i);
@@ -57,6 +59,10 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
+ nr_page_metadata = 0;
+ for_each_online_node(nid)
+ nr_page_metadata += node_page_state(NODE_DATA(nid), NR_PAGE_METADATA);
+
show_val_kb(m, "MemTotal: ", i.totalram);
show_val_kb(m, "MemFree: ", i.freeram);
show_val_kb(m, "MemAvailable: ", available);
@@ -104,6 +110,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
show_val_kb(m, "Mapped: ",
global_node_page_state(NR_FILE_MAPPED));
show_val_kb(m, "Shmem: ", i.sharedram);
+ show_val_kb(m, "PageMetadata: ", nr_page_metadata);
show_val_kb(m, "KReclaimable: ", sreclaimable +
global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 4106fbc5b4b3..dda1ad522324 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -207,6 +207,9 @@ enum node_stat_item {
PGPROMOTE_SUCCESS, /* promote successfully */
PGPROMOTE_CANDIDATE, /* candidate pages to promote */
#endif
+ NR_PAGE_METADATA, /* Page metadata size (struct page and page_ext)
+ * in pages
+ */
NR_VM_NODE_STAT_ITEMS
};
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index fed855bae6d8..b5c292560f37 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -656,4 +656,8 @@ static inline void lruvec_stat_sub_folio(struct folio *folio,
{
lruvec_stat_mod_folio(folio, idx, -folio_nr_pages(folio));
}
+
+void __init mod_node_early_perpage_metadata(int nid, long delta);
+void __init writeout_early_perpage_metadata(void);
+
#endif /* _LINUX_VMSTAT_H */
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ba6d39b71cb1..ca36751be50e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1758,6 +1758,10 @@ static void __update_and_free_hugetlb_folio(struct hstate *h,
destroy_compound_gigantic_folio(folio, huge_page_order(h));
free_gigantic_folio(folio, huge_page_order(h));
} else {
+#ifndef CONFIG_SPARSEMEM_VMEMMAP
+ __mod_node_page_state(NODE_DATA(page_to_nid(&folio->page)),
+ NR_PAGE_METADATA, -huge_page_order(h));
+#endif
__free_pages(&folio->page, huge_page_order(h));
}
}
@@ -2143,7 +2147,9 @@ static struct folio *alloc_buddy_hugetlb_folio(struct hstate *h,
__count_vm_event(HTLB_BUDDY_PGALLOC_FAIL);
return NULL;
}
-
+#ifndef CONFIG_SPARSEMEM_VMEMMAP
+ __mod_node_page_state(NODE_DATA(nid), NR_PAGE_METADATA, huge_page_order(h));
+#endif
__count_vm_event(HTLB_BUDDY_PGALLOC);
return page_folio(page);
}
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index 4b9734777f69..7f920bfa8e79 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -214,6 +214,8 @@ static inline void free_vmemmap_page(struct page *page)
free_bootmem_page(page);
else
__free_page(page);
+ __mod_node_page_state(NODE_DATA(page_to_nid(page)),
+ NR_PAGE_METADATA, -1);
}
/* Free a list of the vmemmap pages */
@@ -336,6 +338,7 @@ static int vmemmap_remap_free(unsigned long start, unsigned long end,
(void *)walk.reuse_addr);
list_add(&walk.reuse_page->lru, &vmemmap_pages);
}
+ __mod_node_page_state(NODE_DATA(nid), NR_PAGE_METADATA, 1);
/*
* In order to make remapping routine most efficient for the huge pages,
@@ -387,8 +390,12 @@ static int alloc_vmemmap_page_list(unsigned long start, unsigned long end,
while (nr_pages--) {
page = alloc_pages_node(nid, gfp_mask, 0);
- if (!page)
+ if (!page) {
goto out;
+ } else {
+ __mod_node_page_state(NODE_DATA(page_to_nid(page)),
+ NR_PAGE_METADATA, 1);
+ }
list_add_tail(&page->lru, list);
}
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 50f2f34745af..e02dce7e2e9a 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -26,6 +26,7 @@
#include <linux/pgtable.h>
#include <linux/swap.h>
#include <linux/cma.h>
+#include <linux/vmstat.h>
#include "internal.h"
#include "slab.h"
#include "shuffle.h"
@@ -1656,6 +1657,8 @@ static void __init alloc_node_mem_map(struct pglist_data *pgdat)
panic("Failed to allocate %ld bytes for node %d memory map\n",
size, pgdat->node_id);
pgdat->node_mem_map = map + offset;
+ mod_node_early_perpage_metadata(pgdat->node_id,
+ PAGE_ALIGN(size) >> PAGE_SHIFT);
}
pr_debug("%s: node %d, pgdat %08lx, node_mem_map %08lx\n",
__func__, pgdat->node_id, (unsigned long)pgdat,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0c5be12f9336..4e295d5087f4 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5443,6 +5443,7 @@ void __init setup_per_cpu_pageset(void)
for_each_online_pgdat(pgdat)
pgdat->per_cpu_nodestats =
alloc_percpu(struct per_cpu_nodestat);
+ writeout_early_perpage_metadata();
}
__meminit void zone_pcp_init(struct zone *zone)
diff --git a/mm/page_ext.c b/mm/page_ext.c
index 4548fcc66d74..b5b9d3079e20 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -201,6 +201,8 @@ static int __init alloc_node_page_ext(int nid)
return -ENOMEM;
NODE_DATA(nid)->node_page_ext = base;
total_usage += table_size;
+ __mod_node_page_state(NODE_DATA(nid), NR_PAGE_METADATA,
+ PAGE_ALIGN(table_size) >> PAGE_SHIFT);
return 0;
}
@@ -255,12 +257,15 @@ static void *__meminit alloc_page_ext(size_t size, int nid)
void *addr = NULL;
addr = alloc_pages_exact_nid(nid, size, flags);
- if (addr) {
+ if (addr)
kmemleak_alloc(addr, size, 1, flags);
- return addr;
- }
+ else
+ addr = vzalloc_node(size, nid);
- addr = vzalloc_node(size, nid);
+ if (addr) {
+ __mod_node_page_state(NODE_DATA(nid), NR_PAGE_METADATA,
+ PAGE_ALIGN(size) >> PAGE_SHIFT);
+ }
return addr;
}
@@ -314,6 +319,10 @@ static void free_page_ext(void *addr)
BUG_ON(PageReserved(page));
kmemleak_free(addr);
free_pages_exact(addr, table_size);
+
+ __mod_node_page_state(NODE_DATA(page_to_nid(page)), NR_PAGE_METADATA,
+ (long)-1 * (PAGE_ALIGN(table_size) >> PAGE_SHIFT));
+
}
}
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index a2cbe44c48e1..e33f302db7c6 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -469,5 +469,8 @@ struct page * __meminit __populate_section_memmap(unsigned long pfn,
if (r < 0)
return NULL;
+ __mod_node_page_state(NODE_DATA(nid), NR_PAGE_METADATA,
+ PAGE_ALIGN(end - start) >> PAGE_SHIFT);
+
return pfn_to_page(pfn);
}
diff --git a/mm/sparse.c b/mm/sparse.c
index 77d91e565045..db78233a85ef 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -14,7 +14,7 @@
#include <linux/swap.h>
#include <linux/swapops.h>
#include <linux/bootmem_info.h>
-
+#include <linux/vmstat.h>
#include "internal.h"
#include <asm/dma.h>
@@ -465,6 +465,9 @@ static void __init sparse_buffer_init(unsigned long size, int nid)
*/
sparsemap_buf = memmap_alloc(size, section_map_size(), addr, nid, true);
sparsemap_buf_end = sparsemap_buf + size;
+#ifndef CONFIG_SPARSEMEM_VMEMMAP
+ mod_node_early_perpage_metadata(nid, PAGE_ALIGN(size) >> PAGE_SHIFT);
+#endif
}
static void __init sparse_buffer_fini(void)
@@ -641,6 +644,8 @@ static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages,
unsigned long start = (unsigned long) pfn_to_page(pfn);
unsigned long end = start + nr_pages * sizeof(struct page);
+ __mod_node_page_state(NODE_DATA(page_to_nid(pfn_to_page(pfn))), NR_PAGE_METADATA,
+ (long)-1 * (PAGE_ALIGN(end - start) >> PAGE_SHIFT));
vmemmap_free(start, end, altmap);
}
static void free_map_bootmem(struct page *memmap)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 00e81e99c6ee..731eb5264b49 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1245,6 +1245,7 @@ const char * const vmstat_text[] = {
"pgpromote_success",
"pgpromote_candidate",
#endif
+ "nr_page_metadata",
/* enum writeback_stat_item counters */
"nr_dirty_threshold",
@@ -2274,4 +2275,24 @@ static int __init extfrag_debug_init(void)
}
module_init(extfrag_debug_init);
+
+// Page metadata size (struct page and page_ext) in pages
+unsigned long early_perpage_metadata[MAX_NUMNODES] __initdata;
+
+void __init mod_node_early_perpage_metadata(int nid, long delta)
+{
+ early_perpage_metadata[nid] += delta;
+}
+
+void __init writeout_early_perpage_metadata(void)
+{
+ int nid;
+ struct pglist_data *pgdat;
+
+ for_each_online_pgdat(pgdat) {
+ nid = pgdat->node_id;
+ __mod_node_page_state(NODE_DATA(nid), NR_PAGE_METADATA,
+ early_perpage_metadata[nid]);
+ }
+}
#endif
--
2.42.0.283.g2d96d420d3-goog
On 13.09.23 19:30, Sourav Panda wrote:
> Adds a new per-node PageMetadata field to
> /sys/devices/system/node/nodeN/meminfo
> and a global PageMetadata field to /proc/meminfo. This information can
> be used by users to see how much memory is being used by per-page
> metadata, which can vary depending on build configuration, machine
> architecture, and system use.
>
> Per-page metadata is the amount of memory that Linux needs in order to
> manage memory at the page granularity. The majority of such memory is
> used by "struct page" and "page_ext" data structures.
It's probably worth mentioning, that in contrast to most other "memory
consumption" statistics, this metadata might not be included "MemTotal";
when the memmap is allocated using the memblock allocator, it's not
included, when it's dynamically allocated using the buddy (e.g., memory
hotplug), it's included.
--
Cheers,
David / dhildenb
Hello,
kernel test robot noticed "WARNING:at_mm/vmstat.c:#__mod_node_page_state" on:
commit: af92fce0e99952613b7dac06b40a35decef4cad9 ("[PATCH v1 1/1] mm: report per-page metadata information")
url: https://github.com/intel-lab-lkp/linux/commits/Sourav-Panda/mm-report-per-page-metadata-information/20230914-013201
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/all/[email protected]/
patch subject: [PATCH v1 1/1] mm: report per-page metadata information
in testcase: boot
compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-lkp/[email protected]
[ 4.596915][ T1] ------------[ cut here ]------------
[ 4.597618][ T1] WARNING: CPU: 0 PID: 1 at mm/vmstat.c:393 __mod_node_page_state (kbuild/src/rand-x86_64-2/mm/vmstat.c:393)
[ 4.598717][ T1] Modules linked in:
[ 4.598835][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.6.0-rc1-00154-gaf92fce0e999 #4
[ 4.599915][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 4.601238][ T1] RIP: 0010:__mod_node_page_state (kbuild/src/rand-x86_64-2/mm/vmstat.c:393)
[ 4.602031][ T1] Code: 5e 41 5f 5d 31 c0 31 d2 31 c9 31 f6 31 ff c3 65 8b 0d bc 7e e0 7e 81 e1 ff ff ff 7f 75 b5 65 8b 0d 11 7c c3 7e 85 c9 74 aa 90 <0f> 0b 90 eb a4 49 83 fe 29 77 26 4e 8d 3c f5 88 33 00 00 f0 4b 01
All code
========
0: 5e pop %rsi
1: 41 5f pop %r15
3: 5d pop %rbp
4: 31 c0 xor %eax,%eax
6: 31 d2 xor %edx,%edx
8: 31 c9 xor %ecx,%ecx
a: 31 f6 xor %esi,%esi
c: 31 ff xor %edi,%edi
e: c3 ret
f: 65 8b 0d bc 7e e0 7e mov %gs:0x7ee07ebc(%rip),%ecx # 0x7ee07ed2
16: 81 e1 ff ff ff 7f and $0x7fffffff,%ecx
1c: 75 b5 jne 0xffffffffffffffd3
1e: 65 8b 0d 11 7c c3 7e mov %gs:0x7ec37c11(%rip),%ecx # 0x7ec37c36
25: 85 c9 test %ecx,%ecx
27: 74 aa je 0xffffffffffffffd3
29: 90 nop
2a:* 0f 0b ud2 <-- trapping instruction
2c: 90 nop
2d: eb a4 jmp 0xffffffffffffffd3
2f: 49 83 fe 29 cmp $0x29,%r14
33: 77 26 ja 0x5b
35: 4e 8d 3c f5 88 33 00 lea 0x3388(,%r14,8),%r15
3c: 00
3d: f0 lock
3e: 4b rex.WXB
3f: 01 .byte 0x1
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 90 nop
3: eb a4 jmp 0xffffffffffffffa9
5: 49 83 fe 29 cmp $0x29,%r14
9: 77 26 ja 0x31
b: 4e 8d 3c f5 88 33 00 lea 0x3388(,%r14,8),%r15
12: 00
13: f0 lock
14: 4b rex.WXB
15: 01 .byte 0x1
[ 4.602165][ T1] RSP: 0000:ffff888100307e20 EFLAGS: 00010202
[ 4.602954][ T1] RAX: 00000000001f2cc0 RBX: 0000000000000000 RCX: 0000000000000001
[ 4.604020][ T1] RDX: 0000000000000240 RSI: 0000000000000023 RDI: ffffffff83c6ef00
[ 4.605021][ T1] RBP: ffff888100307e48 R08: 0000000000000000 R09: 0000000000000000
[ 4.605499][ T1] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff83c6ef00
[ 4.606507][ T1] R13: 00000000001f2ce9 R14: 0000000000000028 R15: 0000000000240000
[ 4.607520][ T1] FS: 0000000000000000(0000) GS:ffff88842fa00000(0000) knlGS:0000000000000000
[ 4.608632][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.608832][ T1] CR2: ffff88843ffff000 CR3: 0000000003644000 CR4: 00000000000406b0
[ 4.609842][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 4.612168][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 4.613186][ T1] Call Trace:
[ 4.613606][ T1] <TASK>
[ 4.613982][ T1] ? show_regs (kbuild/src/rand-x86_64-2/arch/x86/kernel/dumpstack.c:479)
[ 4.614528][ T1] ? __warn (kbuild/src/rand-x86_64-2/kernel/panic.c:677)
[ 4.615040][ T1] ? __mod_node_page_state (kbuild/src/rand-x86_64-2/mm/vmstat.c:393)
[ 4.615501][ T1] ? report_bug (kbuild/src/rand-x86_64-2/lib/bug.c:180 kbuild/src/rand-x86_64-2/lib/bug.c:219)
[ 4.616083][ T1] ? handle_bug (kbuild/src/rand-x86_64-2/arch/x86/kernel/traps.c:237)
[ 4.616642][ T1] ? exc_invalid_op (kbuild/src/rand-x86_64-2/arch/x86/kernel/traps.c:258 (discriminator 1))
[ 4.617240][ T1] ? asm_exc_invalid_op (kbuild/src/rand-x86_64-2/arch/x86/include/asm/idtentry.h:568)
[ 4.617895][ T1] ? __mod_node_page_state (kbuild/src/rand-x86_64-2/mm/vmstat.c:393)
[ 4.618575][ T1] init_section_page_ext (kbuild/src/rand-x86_64-2/mm/page_ext.c:292)
[ 4.618836][ T1] page_ext_init (kbuild/src/rand-x86_64-2/mm/page_ext.c:482)
[ 4.619433][ T1] page_alloc_init_late (kbuild/src/rand-x86_64-2/mm/mm_init.c:2417)
[ 4.620098][ T1] kernel_init_freeable (kbuild/src/rand-x86_64-2/init/main.c:1325 kbuild/src/rand-x86_64-2/init/main.c:1547)
[ 4.620765][ T1] ? rest_init (kbuild/src/rand-x86_64-2/init/main.c:1429)
[ 4.621325][ T1] kernel_init (kbuild/src/rand-x86_64-2/init/main.c:1439)
[ 4.621880][ T1] ? schedule_tail (kbuild/src/rand-x86_64-2/kernel/sched/core.c:5318)
[ 4.622167][ T1] ret_from_fork (kbuild/src/rand-x86_64-2/arch/x86/kernel/process.c:153)
[ 4.622753][ T1] ? rest_init (kbuild/src/rand-x86_64-2/init/main.c:1429)
[ 4.623314][ T1] ret_from_fork_asm (kbuild/src/rand-x86_64-2/arch/x86/entry/entry_64.S:312)
[ 4.623942][ T1] </TASK>
[ 4.624331][ T1] irq event stamp: 11857
[ 4.624861][ T1] hardirqs last enabled at (11865): __up_console_sem (kbuild/src/rand-x86_64-2/kernel/printk/printk.c:347 (discriminator 1))
[ 4.625498][ T1] hardirqs last disabled at (11874): __up_console_sem (kbuild/src/rand-x86_64-2/kernel/printk/printk.c:345 (discriminator 1))
[ 4.626689][ T1] softirqs last enabled at (11546): __do_softirq (kbuild/src/rand-x86_64-2/arch/x86/include/asm/preempt.h:27 kbuild/src/rand-x86_64-2/kernel/softirq.c:400 kbuild/src/rand-x86_64-2/kernel/softirq.c:582)
[ 4.627866][ T1] softirqs last disabled at (11541): __irq_exit_rcu (kbuild/src/rand-x86_64-2/kernel/softirq.c:427 kbuild/src/rand-x86_64-2/kernel/softirq.c:632)
[ 4.628832][ T1] ---[ end trace 0000000000000000 ]---
[ 4.694353][ T1] allocated 301989888 bytes of page_ext
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20230918/[email protected]
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki