Re: TAKE - delalloc buffer and page handling cleanup

[Chris Pascoe <c.pascoe@xxxxxxxxxxxxxx>]

> I get a repeatable crash immediately on 017 with these changes.  Same
> machine as before (1GB/Dual P3-Xeon), just a slightly different partiton
> layout.  Was I supposed to avoid test 017 too?

Avoiding tests 013, 017, 049 (and all the tape ones!), the stress tests
have completed 3 passes now..  Hmm, must have seen me typing - 042 just
failed (running SMP/highmem again).

Active process was:
0xef9e6000 00005670 00005669  1  001  run   0xef9e6350*xfs_fsr

042 90s ...Start mounting filesystem: sd(8,19)
Ending clean XFS mount for filesystem: sd(8,19)
Start mounting filesystem: sd(8,19)
Ending clean XFS mount for filesystem: sd(8,19)
Unable to handle kernel NULL pointer dereference at virtual address
00000000
 printing eip:
c0161ea4
*pde = 00000000

Entering kdb (current=0xef9e6000, pid 5670) on processor 1 Oops: Oops
due to oops @ 0xc0161ea4
eax = 0x00000000 ebx = 0xc4b09d60 ecx = 0x00000009 edx = 0x00000000
esi = 0x4014e200 edi = 0x00000000 esp = 0xef9e7d7c eip = 0xc0161ea4
ebp = 0xef9e7db8 xss = 0x00000018 xcs = 0x00000010 eflags = 0x00010246
xds = 0x00000018 xes = 0x00000018 origeax = 0xffffffff &regs = 0xef9e7d48
[1]kdb> bt
    EBP       EIP         Function(args)
0xef9e7db8 0xc0161ea4 _pb_direct_io+0x90 (0xf3594240, 0x0, 0x0, 0x100000, 
0xef9e7e1c)
                               kernel .text 0xc0100000 0xc0161e14 0xc0161fd4
0xef9e7e3c 0xc0163285 _pagebuf_file_write+0x175 (0xd8a99320, 0x4014e200, 
0x100000, 0xef9e7ea8, 0xc01cea90)
                               kernel .text 0xc0100000 0xc0163110 0xc016330c
0xef9e7eb0 0xc016340d pagebuf_generic_file_write+0x101 (0xd8a99320, 0x4014e200, 
0x100000, 0xef9e7f84, 0xc01cea90)
                               kernel .text 0xc0100000 0xc016330c 0xc016374c
0xef9e7f34 0xc01cfd98 xfs_write+0x348 (0xece267a8, 0xef9e7f78, 0x0, 0x0, 0x0)
                               kernel .text 0xc0100000 0xc01cfa50 0xc01d0054
0xef9e7f98 0xc01cb765 linvfs_write+0x10d (0xd8a99320, 0x4014e200, 0x100000, 
0xd8a99340)
                               kernel .text 0xc0100000 0xc01cb658 0xc01cb7a0
0xef9e7fbc 0xc0136175 sys_write+0x95 (0x7, 0x4014e200, 0x100000, 0x100000, 
0x100000)
                               kernel .text 0xc0100000 0xc01360e0 0xc01361b0
           0xc0106fcb system_call+0x33
                               kernel .text 0xc0100000 0xc0106f98 0xc0106fd0

Chris