modprobe sctp on my laptop does this which looks crazy..
[28106.742435] modprobe: page allocation failure. order:10, mode:0x20
[28106.742744] Pid: 8839, comm: modprobe Not tainted 2.6.38-09065-g89078d5-dirty #6
[28106.743129] Call Trace:
[28106.743262] [<ffffffff810f6811>] __alloc_pages_nodemask+0x7f6/0x885
[28106.743578] [<ffffffff81193604>] ? proc_register+0x129/0x1ad
[28106.743864] [<ffffffff81121e29>] alloc_pages_current+0xb1/0xca
[28106.744175] [<ffffffff8126b35d>] ? __raw_spin_lock_init+0x31/0x50
[28106.744478] [<ffffffff810f2a21>] __get_free_pages+0x16/0x53
[28106.744766] [<ffffffffa03061a0>] sctp_init+0x1a0/0x7d5 [sctp]
[28106.745066] [<ffffffff8103403f>] ? set_memory_ro+0x21/0x23
[28106.745349] [<ffffffffa0306000>] ? 0xffffffffa0305fff
[28106.745607] [<ffffffff81002193>] do_one_initcall+0x7f/0x13c
[28106.745889] [<ffffffff81096ffb>] sys_init_module+0xe2/0x231
[28106.746184] [<ffffffff814d6bc2>] system_call_fastpath+0x16/0x1b
[28106.746478] Mem-Info:
[28106.746595] Node 0 DMA per-cpu:
[28106.746762] CPU 0: hi: 0, btch: 1 usd: 0
[28106.746998] CPU 1: hi: 0, btch: 1 usd: 0
[28106.747256] Node 0 DMA32 per-cpu:
[28106.747433] CPU 0: hi: 186, btch: 31 usd: 164
[28106.747672] CPU 1: hi: 186, btch: 31 usd: 156
[28106.747909] Node 0 Normal per-cpu:
[28106.748103] CPU 0: hi: 186, btch: 31 usd: 93
[28106.748341] CPU 1: hi: 186, btch: 31 usd: 162
[28106.748582] active_anon:198288 inactive_anon:25897 isolated_anon:0
[28106.748584] active_file:118670 inactive_file:224764 isolated_file:0
[28106.748585] unevictable:4 dirty:39 writeback:0 unstable:0
[28106.748586] free:309311 slab_reclaimable:56405 slab_unreclaimable:38498
[28106.748587] mapped:59632 shmem:28756 pagetables:8080 bounce:0
[28106.750099] Node 0 DMA free:15900kB min:256kB low:320kB high:384kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15676kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
[28106.751887] lowmem_reserve[]: 0 2959 3969 3969
[28106.752167] Node 0 DMA32 free:1208204kB min:50192kB low:62740kB high:75288kB active_anon:635892kB inactive_anon:83536kB active_file:268160kB inactive_file:620756kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:3030584kB mlocked:0kB dirty:24kB writeback:0kB mapped:150448kB shmem:90868kB slab_reclaimable:152208kB slab_unreclaimable:22560kB kernel_stack:288kB pagetables:4496kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:32 all_unreclaimable? no
[28106.754183] lowmem_reserve[]: 0 0 1010 1010
[28106.754437] Node 0 Normal free:21944kB min:17128kB low:21408kB high:25692kB active_anon:154572kB inactive_anon:22740kB active_file:206520kB inactive_file:269424kB unevictable:16kB isolated(anon):0kB isolated(file):0kB present:1034240kB mlocked:16kB dirty:132kB writeback:0kB mapped:88080kB shmem:24156kB slab_reclaimable:73412kB slab_unreclaimable:131432kB kernel_stack:2352kB pagetables:27824kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:39 all_unreclaimable? no
[28106.756463] lowmem_reserve[]: 0 0 0 0
[28106.756693] Node 0 DMA: 1*4kB 1*8kB 1*16kB 0*32kB 2*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 3*4096kB = 15900kB
[28106.757336] Node 0 DMA32: 27*4kB 46*8kB 15*16kB 170*32kB 2428*64kB 1505*128kB 894*256kB 427*512kB 377*1024kB 6*2048kB 2*4096kB = 1208204kB
[28106.758068] Node 0 Normal: 280*4kB 390*8kB 139*16kB 80*32kB 53*64kB 36*128kB 14*256kB 2*512kB 0*1024kB 1*2048kB 0*4096kB = 23680kB
[28106.758757] 369501 total pagecache pages
[28106.758950] 0 pages in swap cache
[28106.759131] Swap cache stats: add 0, delete 0, find 0/0
[28106.759388] Free swap = 6127612kB
[28106.759558] Total swap = 6127612kB
[28106.779675] 1048560 pages RAM
[28106.779830] 47810 pages reserved
[28106.779996] 252000 pages shared
[28106.780169] 512980 pages non-shared
[28106.785199] sctp: Hash tables configured (established 26214 bind 26214)
it doesn't look like the hashtable allocation code has changed in ages, so I'm
not sure why I've never triggered this before.
Dave
From: Dave Jones <[email protected]>
Date: Wed, 30 Mar 2011 19:40:21 -0400
> modprobe sctp on my laptop does this which looks crazy..
...
> it doesn't look like the hashtable allocation code has changed in ages, so I'm
> not sure why I've never triggered this before.
I decided to take a break from watching Charlie Sheen dubstep remixes
in a loop on youtube to look at this bug.
This situation is amusing because SCTP actually tries to allocate an
initially smaller hash table than, for example, the DCCP module does.
But DCCP won't show the behavior you see.
The thing that's different is that SCTP forgets to pass __GFP_NOWARN
to the allocation. The code there is able to handle failures just
fine and simply tries to progressively grab a smaller table when that
happens.
I'll commit the following to net-2.6, thanks.
Now back to Adonis dubsteps...
--------------------
sctp: Pass __GFP_NOWARN to hash table allocation attempts.
Like DCCP and other similar pieces of code, there are mechanisms
here to try allocating smaller hash tables if the allocation
fails. So pass in __GFP_NOWARN like the others do instead of
emitting a scary message.
Reported-by: Dave Jones <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
---
net/sctp/protocol.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 152976e..d5bf91d 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1205,7 +1205,7 @@ SCTP_STATIC __init int sctp_init(void)
if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
continue;
sctp_assoc_hashtable = (struct sctp_hashbucket *)
- __get_free_pages(GFP_ATOMIC, order);
+ __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order);
} while (!sctp_assoc_hashtable && --order > 0);
if (!sctp_assoc_hashtable) {
pr_err("Failed association hash alloc\n");
@@ -1238,7 +1238,7 @@ SCTP_STATIC __init int sctp_init(void)
if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
continue;
sctp_port_hashtable = (struct sctp_bind_hashbucket *)
- __get_free_pages(GFP_ATOMIC, order);
+ __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order);
} while (!sctp_port_hashtable && --order > 0);
if (!sctp_port_hashtable) {
pr_err("Failed bind hash alloc\n");
--
1.7.4.2