Re: 2.6.34.1 page allocation failure

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On Sun, Aug 22, 2010 at 9:47 AM, Mikael Abrahamsson <swmike@xxxxxxxxx> wrote:
> On Sun, 22 Aug 2010, Stan Hoeppner wrote:
>
>> I'm not subscribed to lkml so please CC me in replies.  First post.
>
> I'm seeing similar problems on older kernels (.24 up to .32).
>
> <http://www.spinics.net/lists/linux-mm/msg07808.html>
>
> I didn't get any response at all, neither on linux-mm or lkml... Our
> problems seem very similar, but I'm running 64bit and I have 8 gigs of ram.
>
> Personally I can avoid this by tuning down my TCP settings so TCP uses less
> memory, but I don't think that workaround is very good, this shouldn't
> happen. My machine also freezes up (pressing caps lock doesn't work)
> sometimes, sometimes it just logs the error.
>
>> Mobo:    Abit BP6, dual Celeron 366@500, i440BX chipset, 384MB PC100
>> Disk:    SiI 3512 PCI (sata_sil, libata), 1 x WD5000AAKS 500 GB SATAII
>> Kernel:  vanilla 2.6.34.1, 32 bit x86, SMP, Celeron pre Coppermine
>> OS:      Debian 5.0.5 (Stable)
>> Build:   kernel configured via make menuconfig
>>        no modules, no initrd
>>        built via "make KDEB_PKGVERSION="
>>        installed via dpkg, bootloader is LILO
>> Role:    headless SOHO server, run level 2, _very_ light load
>>        Postfix, pdns-recursor, Dovecot, Lighttpd, Roundcube, Samba
>>        bulk of system memory (>300MB) is consumed by buffers/cache
>> Issue:   AFAIK, these errors never occurred with any revisions of
>>        2.6.26, .31, or .32.  After installing 2.6.34.1 I've noticed
>>        the following errors in dmesg.  I see 6 of these, including
>>        two errors each for kswapd0, lighttpd, and smtpd, all not
>>        tainted.  AFAICT everything is still running fine.  Are these
>>        critical errors?  If so, how do I fix?
>>
>> kswapd0: page allocation failure. order:1, mode:0x20
>> Pid: 139, comm: kswapd0 Not tainted 2.6.34.1 #1
>> Call Trace:
>> [<c104b6b3>] ? __alloc_pages_nodemask+0x448/0x48a
>> [<c1062ffb>] ? cache_alloc_refill+0x22f/0x422
>> [<c11a9a73>] ? tcp_v4_send_check+0x6e/0xa4
>> [<c10632c3>] ? kmem_cache_alloc+0x41/0x6a
>> [<c11773a5>] ? sk_prot_alloc+0x19/0x55
>> [<c117744b>] ? sk_clone+0x16/0x1cc
>> [<c119a71d>] ? inet_csk_clone+0xf/0x80
>> [<c11ac0e3>] ? tcp_create_openreq_child+0x1a/0x3c8
>> [<c11aaf0a>] ? tcp_v4_syn_recv_sock+0x4b/0x151
>> [<c11abf9d>] ? tcp_check_req+0x209/0x335
>> [<c11aa892>] ? tcp_v4_do_rcv+0x8d/0x14d
>> [<c11aacd5>] ? tcp_v4_rcv+0x383/0x56d
>> [<c1193ba4>] ? ip_local_deliver+0x76/0xc0
>> [<c1193b10>] ? ip_rcv+0x3dc/0x3fa
>> [<c103655e>] ? ktime_get_real+0xf/0x2b
>> [<c117f8d3>] ? netif_receive_skb+0x219/0x234
>> [<c115ff46>] ? e100_poll+0x1d0/0x47e
>> [<c117fa98>] ? net_rx_action+0x58/0xf8
>> [<c102539c>] ? __do_softirq+0x78/0xe5
>> [<c102542c>] ? do_softirq+0x23/0x27
>> [<c1003955>] ? do_IRQ+0x7d/0x8e
>> [<c1002aa9>] ? common_interrupt+0x29/0x30
>> [<c1062870>] ? kmem_cache_free+0xbd/0xc5
>> [<c10fa7d1>] ? __xfs_inode_set_reclaim_tag+0x29/0x2f
>> [<c1075215>] ? destroy_inode+0x1c/0x2b
>> [<c10752ce>] ? dispose_list+0xaa/0xd0
>> [<c107548c>] ? shrink_icache_memory+0x198/0x1c5
>> [<c104f76b>] ? shrink_slab+0xda/0x12f
>> [<c104fc28>] ? kswapd+0x468/0x63b
>> [<c104dca3>] ? isolate_pages_global+0x0/0x1bc
>> [<c10304d6>] ? autoremove_wake_function+0x0/0x2d
>> [<c1018faf>] ? complete+0x28/0x36
>> [<c104f7c0>] ? kswapd+0x0/0x63b
>> [<c10301cd>] ? kthread+0x61/0x66
>> [<c103016c>] ? kthread+0x0/0x66
>> [<c1002ab6>] ? kernel_thread_helper+0x6/0x10
>> Mem-Info:
>> DMA per-cpu:
>> CPU    0: hi:    0, btch:   1 usd:   0
>> CPU    1: hi:    0, btch:   1 usd:   0
>> Normal per-cpu:
>> CPU    0: hi:  186, btch:  31 usd: 180
>> CPU    1: hi:  186, btch:  31 usd:  29
>> active_anon:646 inactive_anon:4337 isolated_anon:0
>> active_file:27189 inactive_file:35957 isolated_file:0
>> unevictable:0 dirty:56 writeback:0 unstable:0
>> free:1142 slab_reclaimable:25495 slab_unreclaimable:1020
>> mapped:3116 shmem:143 pagetables:123 bounce:0
>> DMA free:1568kB min:100kB low:124kB high:148kB active_anon:0kB
>> inactive_anon:4kB active_file:5704kB inactive_file:7732kB
>> unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15868kB
>> mlocked:0kB dirty:0kB writeback:0kB mapped:28kB shmem:0kB
>> slab_reclaimable:912kB slab_unreclaimable:52kB kernel_stack:0kB
>> pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0
>> all_unreclaimable? no
>> lowmem_reserve[]: 0 365 365
>> Normal free:3000kB min:2392kB low:2988kB high:3588kB active_anon:2584kB
>> inactive_anon:17344kB active_file:103052kB inactive_file:136096kB
>> unevictable:0kB isolated(anon):0kB isolated(file):0kB present:373888kB
>> mlocked:0kB dirty:224kB writeback:0kB mapped:12436kB shmem:572kB
>> slab_reclaimable:101068kB slab_unreclaimable:4028kB kernel_stack:520kB
>> pagetables:492kB unstable:0kB bounce:0kB writeback_tmp:0kB
>> pages_scanned:0 all_unreclaimable? no
>> lowmem_reserve[]: 0 0 0
>> DMA: 391*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB
>> 0*2048kB 0*4096kB = 1564kB
>> Normal: 750*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB
>> 0*1024kB 0*2048kB 0*4096kB = 3000kB
>> 63342 total pagecache pages
>> 23 pages in swap cache
>> Swap cache stats: add 159, delete 136, find 401/412
>> Free swap  = 995636kB
>> Total swap = 995992kB
>> 98303 pages RAM
>> 1638 pages reserved
>> 22416 pages shared
>> 76947 pages non-shared

In Stan's case, it's a order-1 GFP_ATOMIC allocation but there are
only order-0 pages available. Mel, any recent page allocator fixes in
2.6.35 or 2.6.36-rc1 that Stan/Mikael should test?

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