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Subject2.6.18-rc5 page_to_pfn: Unable to handle kernel NULL pointer dereference
The following just happend to one of our 8-way Opteron cluster nodes
(nfs client version 3, solaris nfs server).

Just let me know if you need further info.

Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
[<ffffffff80150c09>] page_to_pfn+0x0/0x33
PGD 74ba36067 PUD 0
Oops: 0000 [1] SMP
Pid: 1782, comm: sge_execd Not tainted 2.6.18-rc5-tt64-6-gd9629953 #23
RIP: 0010:[<ffffffff80150c09>] [<ffffffff80150c09>] page_to_pfn+0x0/0x33
RSP: 0018:ffff81074b99bbb0 EFLAGS: 00010287
RAX: 0000000000000b9a RBX: 0000000000000734 RCX: 0000000000000b9a
RDX: ffff81074b99bbf0 RSI: ffff810812320500 RDI: 0000000000000000
RBP: 0000000000000466 R08: ffff8104c53a89a0 R09: ffff8104c53a8810
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000008cc
R13: ffff81074b99bbf8 R14: 0000000000002000 R15: ffff8104c53a8ab8
FS: 00002b75f92987a0(0000) GS:ffffffff80703000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 000000080b603000 CR4: 00000000000006a0
Process sge_execd (pid: 1782, threadinfo ffff81074b99a000, task ffff81080bc50040)
Stack: ffffffff80205a72 ffff8104c53a89a0 ffff810812320380 0000000000000b9a
ffff8104c53a89a0 0000000000000466 ffffffff80205cf8 0000000000000000
ffff810817df9678 0000000000000000 ffff8104c53a89a0 ffff810817df9678
Call Trace:
[<ffffffff80205a72>] nfs_readpage_truncate_uninitialised_page+0x77/0xec
[<ffffffff80205cf8>] nfs_readpage_sync+0x211/0x255
[<ffffffff8020677e>] nfs_readpage+0x118/0x151
[<ffffffff8014c65e>] do_generic_mapping_read+0x1ec/0x398
[<ffffffff8014c80a>] file_read_actor+0x0/0xd1
[<ffffffff8014ca52>] __generic_file_aio_read+0x177/0x1b0
[<ffffffff8014cabf>] generic_file_aio_read+0x34/0x39
[<ffffffff801fea68>] nfs_file_read+0xb1/0xc0
[<ffffffff8016df5c>] do_sync_read+0xc9/0x106
[<ffffffff8013e541>] autoremove_wake_function+0x0/0x2e
[<ffffffff8015bd8e>] do_mmap_pgoff+0x5fd/0x6de
[<ffffffff8016e046>] vfs_read+0xad/0x14c
[<ffffffff8016e380>] sys_read+0x45/0x6e
[<ffffffff80109726>] system_call+0x7e/0x83

Code: 48 8b 07 48 c1 e8 3a 48 8b 14 c5 00 c8 70 80 48 b8 b7 6d db
RIP [<ffffffff80150c09>] page_to_pfn+0x0/0x33
RSP <ffff81074b99bbb0>
CR2: 0000000000000000

The only person who always got his work done by Friday was Robinson Crusoe
[unhandled content-type:application/pgp-signature]
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