The following bug was just logged for 2.4.0-test10-pre4.
The machine was recompiling glibc (off a ReiserFS 3.6.18 filesystem)
and X was just running a screensaver at the time this happened. X was
locked up and I couldn't switch to a console, so I killed it with
Alt+SysRq. I was then able to get a task list with Alt+SysRq and cc1
was in the D state (along with kswapd in the Z state.) At this point I
synced and rebooted.
Oct 19 17:52:26 argentium kernel: kernel BUG at vmscan.c:102!
Oct 19 17:52:26 argentium kernel: invalid operand: 0000
Oct 19 17:52:26 argentium kernel: CPU: 0
Oct 19 17:52:26 argentium kernel: EIP:
0010:[try_to_swap_out+250/848]
Oct 19 17:52:26 argentium kernel: EFLAGS: 00010282
Oct 19 17:52:26 argentium kernel: eax: 0000001c ebx: 00000100 ecx:
c12ea000 edx: 00000000
Oct 19 17:52:26 argentium kernel: esi: c11c6858 edi: 00000001 ebp:
06af2045 esp: c12ebee4
Oct 19 17:52:26 argentium kernel: ds: 0018 es: 0018 ss: 0018
Oct 19 17:52:26 argentium kernel: Process kswapd (pid: 2,
stackpage=c12eb000)
Oct 19 17:52:26 argentium kernel: Stack: c01f42c5 c01f4484 00000066
08090000 0808e000 c6af0234 0808a000 08090000
Oct 19 17:52:26 argentium kernel: c012bc03 c1314c60 c6a4b4a0
0808d000 c6af0234 00000004 0808a000 c6a4b4a0
Oct 19 17:52:26 argentium kernel: c1314c60 00000000 0848a000
c6af3080 08090000 08090000 c6af3080 c012be10
Oct 19 17:52:26 argentium kernel: Call Trace: [tvecs+6653/33176]
[tvecs+7100/33176] [swap_out_vma+323/480] [swap_out+368/496]
[refill_inactive+272/544] [do_try_to_free_pages+153/192]
[kswapd+183/432]
Oct 19 17:52:26 argentium kernel: [kernel_thread+36/48]
Oct 19 17:52:26 argentium kernel: Code: 0f 0b 83 c4 0c 90 f7 c5 02 00
00 00 74 18 6a 68 68 84 44 1f
Oct 19 17:56:07 argentium kernel: SysRq: Emergency Sync
Oct 19 17:56:08 argentium kernel: Syncing device 03:06 ... OK
Oct 19 17:56:08 argentium kernel: Syncing device 03:07 ... OK
Oct 19 17:56:08 argentium kernel: Syncing device 03:01 ... OK
Oct 19 17:56:08 argentium kernel: Done.
Oct 19 17:56:11 argentium kernel: SysRq: Show State
Oct 19 17:56:11 argentium kernel:
Oct 19 17:56:11 argentium kernel: task PC stack pid
father child younger older
Oct 19 17:56:11 argentium kernel: init S C1229F2C 3076
1 0 740 (NOTLB)
Oct 19 17:56:11 argentium kernel: sig: 0 0000000000000000
0000000000000000 : X
Oct 19 17:56:11 argentium kernel: kswapd Z C021ED40 5940
2 1 (L-TLB) 3
Oct 19 17:56:11 argentium kernel: sig: 0 0000000000000000
ffffffffffffffff : X
Oct 19 17:56:11 argentium kernel: kreclaimd S 00000286 6648
3 1 (L-TLB) 4 2
Oct 19 17:56:11 argentium kernel: sig: 0 0000000000000000
ffffffffffffffff : X
Oct 19 17:56:11 argentium kernel: kflushd S FFFFFFFF 5796
4 1 (L-TLB) 5 3
Oct 19 17:56:11 argentium kernel: sig: 0 0000000000000000
ffffffffffffffff : X
Oct 19 17:56:11 argentium kernel: kupdate S C12E5FC4 6052
5 1 (L-TLB) 6 4
Oct 19 17:56:11 argentium kernel: sig: 0 0000000000000000
fffffffffff9ffff : X
Oct 19 17:56:11 argentium kernel: kreiserfsd S C132DFC0 5820
6 1 (L-TLB) 15 5
Oct 19 17:56:11 argentium kernel: sig: 0 0000000000000000
ffffffffffffffff : X
...
FYI, mm/vmscan.c:
if (PageSwapCache(page)) {
entry.val = page->index;
swap_duplicate(entry);
if (pte_dirty(pte))
========> BUG();
if (pte_write(pte))
BUG();
set_pte(page_table, swp_entry_to_pte(entry));
drop_pte:
UnlockPage(page);
mm->rss--;
-------------------------------------------------------------
Matt T. Yourst Massachusetts Institute of Technology
[EMAIL PROTECTED] 617.225.7690
513 French House - 476 Memorial Drive - Cambridge, MA 02136
-------------------------------------------------------------
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