On Tue, Jan 22, 2013 at 11:41:19AM -0600, Mitch Harder wrote: > On Thu, Jan 17, 2013 at 8:42 AM, Mitch Harder > <mitch.har...@sabayonlinux.org> wrote: > > On Wed, Jan 16, 2013 at 6:36 AM, Liu Bo <bo.li....@oracle.com> wrote: > >> This comes from one of btrfs's project ideas, > >> As we defragment files, we break any sharing from other snapshots. > >> The balancing code will preserve the sharing, and defrag needs to grow this > >> as well. [...] > > > > I've been testing this patch on a 3.7.2 kernel merged with the > > for-linus branch for the 3.8_rc kernels, and I'm seeing the following > > error: > > > > I've reproduced the error with CONFIG_DEBUG_LIST enabled, which shows > some problem with an entry in the list. > > [59312.260441] ------------[ cut here ]------------ > [59312.260454] WARNING: at lib/list_debug.c:62 __list_del_entry+0x8d/0x98() > [59312.260458] Hardware name: OptiPlex 745 > [59312.260461] list_del corruption. next->prev should be > ffff88006511c438, but was dead000000200200
LIST_POISON2 -> (000000200200) So we can know that the next one is deleted from the list even _earlier_ than the current one is. Any other messages before this warning complains? thanks, liubo > [59312.260464] Modules linked in: ipv6 snd_hda_codec_analog > snd_hda_intel i2c_i801 tg3 snd_hda_codec iTCO_wdt snd_hwdep snd_pcm > ppdev parport_pc sr_mod microcode floppy parport snd_page_alloc > snd_timer snd iTCO_vendor_support lpc_ich serio_raw pcspkr ablk_helper > cryptd lrw xts gf128mul aes_x86_64 sha256_generic fuse xfs nfs lockd > sunrpc reiserfs btrfs zlib_deflate ext4 jbd2 ext3 jbd ext2 mbcache > sl811_hcd hid_generic xhci_hcd ohci_hcd uhci_hcd ehci_hcd > [59312.260519] Pid: 20523, comm: btrfs-cleaner Not tainted 3.7.2-sad+ #1 > [59312.260521] Call Trace: > [59312.260529] [<ffffffff81030586>] warn_slowpath_common+0x83/0x9b > [59312.260549] [<ffffffffa015aa01>] ? reada_for_balance+0x187/0x218 [btrfs] > [59312.260554] [<ffffffff81030641>] warn_slowpath_fmt+0x46/0x48 > [59312.260566] [<ffffffffa015aa01>] ? reada_for_balance+0x187/0x218 [btrfs] > [59312.260570] [<ffffffff812099e5>] __list_del_entry+0x8d/0x98 > [59312.260574] [<ffffffff812099fe>] list_del+0xe/0x2e > [59312.260590] [<ffffffffa017b325>] > btrfs_clean_old_snapshots+0x101/0x168 [btrfs] > [59312.260605] [<ffffffffa0173d99>] cleaner_kthread+0x5a/0xe6 [btrfs] > [59312.260619] [<ffffffffa0173d3f>] ? transaction_kthread+0x1a0/0x1a0 [btrfs] > [59312.260624] [<ffffffff8104c750>] kthread+0xba/0xc2 > [59312.260629] [<ffffffff8104c696>] ? kthread_freezable_should_stop+0x52/0x52 > [59312.260634] [<ffffffff815f2f1c>] ret_from_fork+0x7c/0xb0 > [59312.260639] [<ffffffff8104c696>] ? kthread_freezable_should_stop+0x52/0x52 > [59312.260642] ---[ end trace 61b4cbd93690300f ]--- > [59318.623735] ------------[ cut here ]------------ > [59318.623751] WARNING: at lib/list_debug.c:53 __list_del_entry+0x8d/0x98() > [59318.623755] Hardware name: OptiPlex 745 > [59318.623760] list_del corruption, ffff88006511c438->next is > LIST_POISON1 (dead000000100100) > [59318.623766] Modules linked in: ipv6 snd_hda_codec_analog > snd_hda_intel i2c_i801 tg3 snd_hda_codec iTCO_wdt snd_hwdep snd_pcm > ppdev parport_pc sr_mod microcode floppy parport snd_page_alloc > snd_timer snd iTCO_vendor_support lpc_ich serio_raw pcspkr ablk_helper > cryptd lrw xts gf128mul aes_x86_64 sha256_generic fuse xfs nfs lockd > sunrpc reiserfs btrfs zlib_deflate ext4 jbd2 ext3 jbd ext2 mbcache > sl811_hcd hid_generic xhci_hcd ohci_hcd uhci_hcd ehci_hcd > [59318.623840] Pid: 20523, comm: btrfs-cleaner Tainted: G W > 3.7.2-sad+ #1 > [59318.623844] Call Trace: > [59318.623855] [<ffffffff81030586>] warn_slowpath_common+0x83/0x9b > [59318.623878] [<ffffffffa015aab9>] ? btrfs_free_path+0x27/0x2c [btrfs] > [59318.623885] [<ffffffff81030641>] warn_slowpath_fmt+0x46/0x48 > [59318.623901] [<ffffffffa015aab9>] ? btrfs_free_path+0x27/0x2c [btrfs] > [59318.623907] [<ffffffff812099e5>] __list_del_entry+0x8d/0x98 > [59318.623912] [<ffffffff812099fe>] list_del+0xe/0x2e > [59318.623935] [<ffffffffa017b325>] > btrfs_clean_old_snapshots+0x101/0x168 [btrfs] > [59318.623955] [<ffffffffa0173d99>] cleaner_kthread+0x5a/0xe6 [btrfs] > [59318.623975] [<ffffffffa0173d3f>] ? transaction_kthread+0x1a0/0x1a0 [btrfs] > [59318.623981] [<ffffffff8104c750>] kthread+0xba/0xc2 > [59318.623988] [<ffffffff8104c696>] ? kthread_freezable_should_stop+0x52/0x52 > [59318.623994] [<ffffffff815f2f1c>] ret_from_fork+0x7c/0xb0 > [59318.624000] [<ffffffff8104c696>] ? kthread_freezable_should_stop+0x52/0x52 > [59318.624022] ---[ end trace 61b4cbd936903010 ]--- > [59318.626394] general protection fault: 0000 [#1] SMP > [59318.626439] Modules linked in: ipv6 snd_hda_codec_analog > snd_hda_intel i2c_i801 tg3 snd_hda_codec iTCO_wdt snd_hwdep snd_pcm > ppdev parport_pc sr_mod microcode floppy parport snd_page_alloc > snd_timer snd iTCO_vendor_support lpc_ich serio_raw pcspkr ablk_helper > cryptd lrw xts gf128mul aes_x86_64 sha256_generic fuse xfs nfs lockd > sunrpc reiserfs btrfs zlib_deflate ext4 jbd2 ext3 jbd ext2 mbcache > sl811_hcd hid_generic xhci_hcd ohci_hcd uhci_hcd ehci_hcd > [59318.626832] CPU 0 > [59318.626849] Pid: 20523, comm: btrfs-cleaner Tainted: G W > 3.7.2-sad+ #1 Dell Inc. OptiPlex 745 > /0WF810 > [59318.626926] RIP: 0010:[<ffffffffa017b349>] [<ffffffffa017b349>] > btrfs_clean_old_snapshots+0x125/0x168 [btrfs] > [59318.627018] RSP: 0018:ffff880078f43e38 EFLAGS: 00010206 > [59318.627054] RAX: 0005800000021000 RBX: ffff880000000000 RCX: > 0000000000000008 > [59318.627098] RDX: 0000000000000000 RSI: ffff880078f43d70 RDI: > ffff88006511c470 > [59318.627141] RBP: ffff880078f43e78 R08: 0000000000000000 R09: > ffff88004b61c3f0 > [59318.627184] R10: 0000000000000001 R11: 0000000000000000 R12: > 0000160000000000 > [59318.627228] R13: ffff880078f43e38 R14: ffff88006511c000 R15: > ffff88006511c438 > [59318.627272] FS: 0000000000000000(0000) GS:ffff88007f200000(0000) > knlGS:0000000000000000 > [59318.627322] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [59318.627358] CR2: 00007ff8b6d33375 CR3: 00000000788a0000 CR4: > 00000000000007f0 > [59318.627402] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [59318.627445] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > 0000000000000400 > [59318.627490] Process btrfs-cleaner (pid: 20523, threadinfo > ffff880078f42000, task ffff88007c999a80) > [59318.627543] Stack: > [59318.627557] ffff88006511c438 ffff880002046438 ffff880078f43e48 > ffff880028017800 > [59318.627611] ffff88007c999a80 ffff88007c999a80 ffff88007c999a80 > 0000000000000000 > [59318.627663] ffff880078f43eb8 ffffffffa0173d99 ffff880028017800 > 0000000000000000 > [59318.627719] Call Trace: > [59318.627751] [<ffffffffa0173d99>] cleaner_kthread+0x5a/0xe6 [btrfs] > [59318.627804] [<ffffffffa0173d3f>] ? transaction_kthread+0x1a0/0x1a0 [btrfs] > [59318.627853] [<ffffffff8104c750>] kthread+0xba/0xc2 > [59318.627898] [<ffffffff8104c696>] ? kthread_freezable_should_stop+0x52/0x52 > [59318.627948] [<ffffffff815f2f1c>] ret_from_fork+0x7c/0xb0 > [59318.627986] [<ffffffff8104c696>] ? kthread_freezable_should_stop+0x52/0x52 > [59318.628033] Code: 89 ff e8 cb e6 08 e1 4c 89 f7 e8 22 f4 03 00 49 > 8b 87 c8 fb ff ff 48 8b 80 50 01 00 00 48 8b 00 4c 01 e0 48 c1 f8 06 > 48 c1 e0 0c <0f> b6 44 18 3f 31 c9 31 d2 85 c0 7e 05 ba 01 00 00 00 31 > f6 4c > [59318.628279] RIP [<ffffffffa017b349>] > btrfs_clean_old_snapshots+0x125/0x168 [btrfs] > [59318.628295] RSP <ffff880078f43e38> > [59318.634447] ---[ end trace 61b4cbd936903011 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
