Re: cachefs

[Joshua Levine <spamjoshua@xxxxxxxxx>]

I compiled fscache in the kernel, not as a module, with the following result
under load:

Aug 20 14:15:03 dload05 kernel: [ 3541.595283] Pid: 11273, comm: kslowd Not
tainted 2.6.31-rc6-iwin-linus-cachefs #1
Aug 20 14:15:03 dload05 kernel: [ 3541.595287] Call Trace:
Aug 20 14:15:03 dload05 kernel: [ 3541.595298]  [<ffffffff81302af0>] ?
io_schedule+0x20/0x30
Aug 20 14:15:03 dload05 kernel: [ 3541.595304]  [<ffffffff8115bfb3>] ?
cachefiles_read_waiter+0x153/0x1a0
Aug 20 14:15:03 dload05 kernel: [ 3541.595308]  [<ffffffff81302f0b>] ?
__wait_on_bit+0x6b/0x80
Aug 20 14:15:03 dload05 kernel: [ 3541.595314]  [<ffffffff8103150b>] ?
__wake_up_common+0x5b/0x90
Aug 20 14:15:03 dload05 kernel: [ 3541.595317]  [<ffffffff81032e83>] ?
__wake_up+0x43/0x70
Aug 20 14:15:03 dload05 kernel: [ 3541.595323]  [<ffffffff8105c688>] ?
__wake_up_bit+0x28/0x30
Aug 20 14:15:03 dload05 kernel: [ 3541.595344]  [<ffffffffa01820a7>] ?
ext3_truncate+0x267/0x9d0 [ext3]
Aug 20 14:15:03 dload05 kernel: [ 3541.595350]  [<ffffffff810cca2c>] ?
unmap_mapping_range+0x8c/0x290
Aug 20 14:15:03 dload05 kernel: [ 3541.595355]  [<ffffffff810cee50>] ?
vmtruncate+0xb0/0x110
Aug 20 14:15:03 dload05 kernel: [ 3541.595359]  [<ffffffff81101afe>] ?
inode_setattr+0x2e/0x160
Aug 20 14:15:03 dload05 kernel: [ 3541.595369]  [<ffffffffa01838cc>] ?
ext3_setattr+0xfc/0x210 [ext3]
Aug 20 14:15:03 dload05 kernel: [ 3541.595373]  [<ffffffff81101d95>] ?
notify_change+0x165/0x330
Aug 20 14:15:03 dload05 kernel: [ 3541.595377]  [<ffffffff811571bb>] ?
cachefiles_attr_changed+0x12b/0x1e0
Aug 20 14:15:03 dload05 kernel: [ 3541.595381]  [<ffffffff81159546>] ?
cachefiles_walk_to_object+0x706/0xc00
Aug 20 14:15:03 dload05 kernel: [ 3541.595385]  [<ffffffff8115787e>] ?
cachefiles_lookup_object+0x10e/0x150
Aug 20 14:15:03 dload05 kernel: [ 3541.595390]  [<ffffffff810ad030>] ?
slow_work_thread+0x0/0x450
Aug 20 14:15:03 dload05 kernel: [ 3541.595395]  [<ffffffff8114f6a5>] ?
fscache_lookup_object+0x95/0x220
Aug 20 14:15:03 dload05 kernel: [ 3541.595399]  [<ffffffff8115025e>] ?
fscache_object_slow_work_execute+0x64e/0xb70
Aug 20 14:15:03 dload05 kernel: [ 3541.595403]  [<ffffffff810ad030>] ?
slow_work_thread+0x0/0x450
Aug 20 14:15:03 dload05 kernel: [ 3541.595406]  [<ffffffff810ad2f3>] ?
slow_work_thread+0x2c3/0x450
Aug 20 14:15:03 dload05 kernel: [ 3541.595411]  [<ffffffff8105c6d0>] ?
autoremove_wake_function+0x0/0x30
Aug 20 14:15:03 dload05 kernel: [ 3541.595414]  [<ffffffff810ad030>] ?
slow_work_thread+0x0/0x450
Aug 20 14:15:03 dload05 kernel: [ 3541.595418]  [<ffffffff8105c566>] ?
kthread+0xa6/0xb0
Aug 20 14:15:03 dload05 kernel: [ 3541.595422]  [<ffffffff8100cd9a>] ?
child_rip+0xa/0x20
Aug 20 14:15:03 dload05 kernel: [ 3541.595426]  [<ffffffff8105c4c0>] ?
kthread+0x0/0xb0
Aug 20 14:15:03 dload05 kernel: [ 3541.595429]  [<ffffffff8100cd90>] ?
child_rip+0x0/0x20
Aug 20 14:15:03 dload05 kernel: [ 3541.595451] CacheFiles: I/O Error:
Readpage failed on backing file 100000000000810
Aug 20 14:15:03 dload05 kernel: [ 3541.595506] FS-Cache: Cache cachefiles
stopped due to I/O error

Thank you,
Joshua
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