BUG at mm/filemap.c:618!

[Anton Blanchard]

Hi,

One more in end_page_writeback:

        if (!test_clear_page_writeback(page))
                BUG();

kernel BUG at mm/filemap.c:618!

Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=128 NUMA pSeries
Modules linked in: kafs fcrypt rxkad pcbc af_rxrpc fuse ib_ehca ib_core [last unloaded: kafs]
NIP: c00000000011d17c LR: c00000000011d170 CTR: c00000000011d114
REGS: c00000076bd67220 TRAP: 0700   Not tainted  (2.6.31-rc5-tip)
MSR: 8000000000029032 <EE,ME,CE,IR,DR>  CR: 24004082  XER: 20000020
TASK = c00000076bd68000[625] 'pdflush' THREAD: c00000076bd64000 CPU: 2
GPR00: c00000000011d170 c00000076bd674a0 c000000000ab8d60 0000000000000000 
GPR04: 0000000000000001 0000000000000003 0000000000000000 c00000076bd67410 
GPR08: 0000000000000010 0000000000000000 c000000f3a0e71f0 1000000000000867 
GPR12: 0000000024004088 c000000000afb600 c0000000008466a4 0000000002a6b2f0 
GPR16: 0000000000000000 c00000000096b2f0 d00000000ceecc88 d00000000ceecc88 
GPR20: 0000000000000008 0000000000000002 c00000076bd675b0 c00000076bd675a0 
GPR24: c000000f3b8ed580 0000000000000003 0000000000000002 0000000000000000 
GPR28: c00000076bd675c8 f0000000355f12e0 d00000000cef3488 c00000076bd674a0 
NIP [c00000000011d17c] .end_page_writeback+0x68/0xa4
LR [c00000000011d170] .end_page_writeback+0x5c/0xa4
Call Trace:
[c00000076bd674a0] [c00000000011d170] .end_page_writeback+0x5c/0xa4 (unreliable)
[c00000076bd67530] [d00000000ced256c] .afs_kill_pages+0x1c4/0x25c [kafs]
[c00000076bd67690] [d00000000ced3558] .afs_write_back_from_locked_page+0x3fc/0x4b8 [kafs]
[c00000076bd677b0] [d00000000ced385c] .afs_writepages_region+0x248/0x3b4 [kafs]
[c00000076bd678a0] [d00000000ced3b00] .afs_writepages+0x138/0x264 [kafs]
[c00000076bd67960] [c000000000127b9c] .do_writepages+0x7c/0xbc
[c00000076bd679f0] [c0000000001966bc] .writeback_single_inode+0x1f0/0x4a4
[c00000076bd67b10] [c000000000196fcc] .generic_sync_sb_inodes+0x32c/0x5a4
[c00000076bd67bf0] [c000000000197424] .writeback_inodes+0xf4/0x1a4
[c00000076bd67cb0] [c000000000127eac] .wb_kupdate+0x130/0x1e4
[c00000076bd67db0] [c000000000129614] .pdflush+0x214/0x380
[c00000076bd67ec0] [c0000000000a57b8] .kthread+0xbc/0xc8
[c00000076bd67f90] [c00000000002fc98] .kernel_thread+0x54/0x70

Anton