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Date: Sun, 22 Aug 2010 22:51:02 +0300 From: Pekka Enberg <penberg@...nel.org> To: Mikael Abrahamsson <swmike@....pp.se> Cc: Stan Hoeppner <stan@...dwarefreak.com>, Linux Kernel List <linux-kernel@...r.kernel.org>, linux-mm@...ck.org, Mel Gorman <mel@....ul.ie>, Christoph Lameter <cl@...ux-foundation.org> Subject: Re: 2.6.34.1 page allocation failure On Sun, Aug 22, 2010 at 9:47 AM, Mikael Abrahamsson <swmike@....pp.se> 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? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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