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SubjectRe: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)
Date
oops.  I've overseen a BUG. this is on 2.6.30-rc8-git2 (with NFS still active):

Jun 7 00:04:29 [kernel] [18059.860915] reconnect_path: npd != pd
Jun 7 00:04:29 [kernel] [18059.876749] reconnect_path: npd != pd
Jun 7 00:04:29 [kernel] [18059.884702] reconnect_path: npd != pd
Jun 7 00:04:29 [kernel] [18060.605674] kernel BUG at lib/radix-tree.c:485!
Jun 7 00:04:29 [kernel] [18060.605689] CPU 1
Jun 7 00:04:29 [kernel] [18060.605693] Modules linked in: usbtouchscreen
dvb_usb_cinergyT2 dummy bonding snd_emu10k1 snd_rawmidi snd_ac97_codec ac97_bus
forcedeth snd_pcm hfcpci snd_page_alloc snd_util_mem snd_hwdep
Jun 7 00:04:29 [kernel] [18060.605721] Pid: 392, comm: kswapd0 Not tainted
2.6.30-rc8-git2 #2 empty
Jun 7 00:04:29 [kernel] [18060.605726] RIP: 0010:[<ffffffff80451ad8>]
[<ffffffff80451ad8>] radix_tree_tag_set+0x98/0xc0
Jun 7 00:04:29 [kernel] [18060.605743] RSP: 0018:ffff880226b05cd0 EFLAGS:
00010246
Jun 7 00:04:29 [kernel] [18060.605748] RAX: 000000000000000c RBX:
0000000000000000 RCX: 000000000000000c
Jun 7 00:04:29 [kernel] [18060.605752] RDX: 0000000000000000 RSI:
000000000000040c RDI: ffff88022628e360
Jun 7 00:04:29 [kernel] [18060.605757] RBP: ffff880201159c00 R08:
ffff88020119da28 R09: 0000000000000000
Jun 7 00:04:29 [kernel] [18060.605762] R10: 0000000000000000 R11:
0000000000000001 R12: ffff880201159c00
Jun 7 00:04:29 [kernel] [18060.605766] R13: ffff88022505f400 R14:
ffff880201159cf8 R15: ffff88022628e35c
Jun 7 00:04:29 [kernel] [18060.605772] FS: 0000000043d51950(0000)
GS:ffff88002804e000(0000) knlGS:00000000f4ceab90
Jun 7 00:04:29 [kernel] [18060.605777] CS: 0010 DS: 0018 ES: 0018 CR0:
000000008005003b
Jun 7 00:04:29 [kernel] [18060.605782] CR2: 000000000044b7c0 CR3:
00000001e45fe000 CR4: 00000000000006e0
Jun 7 00:04:29 [kernel] [18060.605786] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Jun 7 00:04:29 [kernel] [18060.605791] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Jun 7 00:04:29 [kernel] [18060.605796] Process kswapd0 (pid: 392, threadinfo
ffff880226b04000, task ffff880227981620)
Jun 7 00:04:29 [kernel] [18060.605803] ffff88022628e320 ffffffff8040a1d6
ffff880201159d80 0000000000000071
Jun 7 00:04:29 [kernel] [18060.606011] RIP [<ffffffff80451ad8>]
radix_tree_tag_set+0x98/0xc0
Jun 7 00:04:30 [kernel] [18060.606018] RSP <ffff880226b05cd0>
Jun 7 00:04:30 [kernel] [18060.606026] ---[ end trace 0645e929a4fa40ac ]---
Jun 7 00:04:31 [kernel] [18061.930702] reconnect_path: npd != pd
Jun 7 00:04:31 [kernel] [18061.930944] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.327856] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.328465] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.328722] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.329075] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.329598] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.329734] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.330410] reconnect_path: npd != pd
Jun 7 00:04:32 [kernel] [18063.330538] reconnect_path: npd != pd

On Monday 08 June 2009 09:27:09 Mathias Kretschmer wrote:
> On Sunday 07 June 2009 22:09:23 Mike Dresser wrote:
> > > introduced between 2.6.28 and 2.6.29. Please verify if it still should
> > > be listed and let me know (either way).
> >
> > Still testing, but so far 2.6.30-rc8(or another RC) seems to have fixed
> > this. I'd say to leave this open for now, there's at least one other
> > person testing 2.6.30-rc8 to see if it's fixed or not.
>
> I'm afraid my test here won't help much to answer this question.
>
> I've seen no more crashes, but starting with 2.6.29 I'm seeing so many
> 'reconnect_path: npd != pd' messages and am experiencing lots of 'stale NFS
> handles' that I turned off NFS yesterday evening until I have more time to
> look into this.
>
> -Mathias
>
> > Mike
> >
> > --
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