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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
    > >
    > > --
    > > To unsubscribe from this list: send the line "unsubscribe linux-kernel"
    > > in the body of a message to majordomo@vger.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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