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    SubjectRe: fscache releated bug
    Date
    Arr - I just found: 

    http://marc.info/?l=linux-nfs&m=126564134718925&w=2

    applied and testing now.

    > Hi,
    >
    > I constantly getting these with current master:
    >
    > ------------[ cut here ]------------
    > kernel BUG at fs/nfs/fscache.c:360!
    > invalid opcode: 0000 [#1] SMP
    > last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
    > CPU 0
    > Pid: 35, comm: kswapd0 Not tainted 2.6.33-rc7-00064-gac73fdd-dirty #4
    > GA-MA69VM- S2/GA-MA69VM-S2
    > RIP: 0010:[<ffffffffa03c20cb>] [<ffffffffa03c20cb>]
    > nfs_fscache_release_page+0xab/0xb0 [nfs]
    > RSP: 0018:ffff880038983990 EFLAGS: 00010246
    > RAX: ffff8800398c7938 RBX: ffffea0000d199a0 RCX: ffff8800398c7790
    > RDX: 0100000000000009 RSI: 00000000000000d0 RDI: ffffea0000d199a0
    > RBP: ffff8800389839b0 R08: 0000000000000000 R09: 0000000000000000
    > R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
    > R13: 00000000000000d0 R14: ffff880038983c30 R15: 0000000000000001
    > FS: 00007f27b7e516f0(0000) GS:ffff880001a00000(0000)
    > knlGS:00000000f74976c0 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    > CR2: 00007f27b3b81000 CR3: 0000000001807000 CR4: 00000000000006f0
    > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    > Process kswapd0 (pid: 35, threadinfo ffff880038982000, task
    > ffff88003bbcd980) Stack:
    > ffff88003b426f70 ffffea0000d199a0 00000000000000d0 ffff880038983da0
    > <0> ffff8800389839d0 ffffffffa039742b ffffea0000d199a0 ffffea0000d199c8
    > <0> ffff8800389839e0 ffffffff810bc73b ffff880038983af0 ffffffff810c9d7b
    > Call Trace:
    > [<ffffffffa039742b>] nfs_release_page+0x3b/0x70 [nfs]
    > [<ffffffff810bc73b>] try_to_release_page+0x2b/0x50
    > [<ffffffff810c9d7b>] shrink_page_list+0x42b/0x5b0
    > [<ffffffff810c88d1>] ? isolate_pages_global+0xa1/0x220
    > [<ffffffff810ca208>] shrink_inactive_list+0x308/0x700
    > [<ffffffff810ca85c>] ? shrink_active_list+0x25c/0x310
    > [<ffffffff810cab86>] shrink_zone+0x276/0x470
    > [<ffffffff810caec2>] ? shrink_slab+0x142/0x180
    > [<ffffffff810cb7f1>] balance_pgdat+0x681/0x700
    > [<ffffffff810c8830>] ? isolate_pages_global+0x0/0x220
    > [<ffffffff810cb979>] kswapd+0x109/0x220
    > [<ffffffff81062b70>] ? autoremove_wake_function+0x0/0x40
    > [<ffffffff810cb870>] ? kswapd+0x0/0x220
    > [<ffffffff8106267e>] kthread+0x8e/0xa0
    > [<ffffffff81003b14>] kernel_thread_helper+0x4/0x10
    > [<ffffffff810625f0>] ? kthread+0x0/0xa0
    > [<ffffffff81003b10>] ? kernel_thread_helper+0x0/0x10
    > Code: e8 4c 8b 65 f0 4c 8b 6d f8 c9 c3 48 89 fa 31 c0 4c 89 e6 48 c7 c7 c8
    > ad 3c a0 e8 38 7c 04 e1 48 8b 03 f6 c4 10 75 a0 31 c0 eb d2 <0f> 0b eb fe
    > 90 55 48 89 e5 e8 77 7e 04 e1 31 c0 c9 c3 0f 1f 00
    > RIP [<ffffffffa03c20cb>] nfs_fscache_release_page+0xab/0xb0 [nfs]
    > RSP <ffff880038983990>
    > ---[ end trace 99c0b5e9d282a6b2 ]---
    >
    > I applied this patch:
    >
    > http://marc.info/?l=linux-nfs&m=126399012901759&w=2
    >
    > but this didn't helped and yes, I'm using cachefilesd.
    >
    > Thanks
    >
    > Marvin
    >
    >
    > --
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    --
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