[linux-mm-cc] Compcache crash syslog

[John McCabe-Dansted]

Here is the syslog of one of the compcache crashes on Gutsy-i386
(2.6.22-14-generic #1) . The most interesting entries appear to be:
  Adding 255996k swap on /dev/compcache.  Priority:1 extents:1 across:255996k
  ...
  compcache: Compressed swap size set to: 756000 KB
  TLSF: pool: f8ba3000, init_size=16384, max_size=0, grow_size=16384
  compcache: compcache: initialization done!
  compcache: read before write: page_no=188976
  printk: 8 messages suppressed.
  Buffer I/O error on device compcache, logical block 188976
  compcache: read before write: page_no=188976
  ...
  Buffer I/O error on device compcache, logical block 188999
  compcache: read before write: page_no=188999
  compcache: read before write: page_no=188999
  compcache: read before write: page_no=188999
  compcache: read before write: page_no=188992
  compcache: read before write: page_no=188998
  compcache: read before write: page_no=188999
  compcache: read before write: page_no=188999
  compcache: read before write: page_no=1
  Adding 755996k swap on /dev/compcache.  Priority:-3 extents:1 across:755996k
  BUG: unable to handle kernel NULL pointer dereference at virtual
address 00000007
  ...
  [lapic_next_event+12/16] lapic_next_event+0xc/0x10
  [<f8b80480>] lzo1x_1_compress+0x30/0x104 [lzo1x_compress]
  [<f8b97153>] compcache_make_request+0x133/0x310 [compcache]
  [generic_make_request+597/992] generic_make_request+0x255/0x3e0
  [smp_apic_timer_interrupt+85/128] smp_apic_timer_interrupt+0x55/0x80
  [apic_timer_interrupt+40/48] apic_timer_interrupt+0x28/0x30
  [native_flush_tlb_others+102/176] native_flush_tlb_others+0x66/0xb0


My apologies for accidentally attaching this syslog to previous message.

-- 
John C. McCabe-Dansted
PhD Student
University of Western Australia