Re: 2.5.40-mm2

From: Dave Hansen (
Date: Tue Oct 08 2002 - 11:43:20 EST

Ingo Molnar wrote:
> On Sun, 6 Oct 2002, Dave Hansen wrote:
>>cc'ing Ingo, because I think this might be related to the timer bh
> could you try the attached patch against 2.5.41, does it help? It fixes
> the bugs found so far plus makes del_timer_sync() a bit more robust by
> re-checking timer pending-ness before exiting. There is one type of code
> that might have relied on this kind of behavior of the old timer code.

Hehe. That'll teach me to be optimistic. This is unprocessed, but
the EIP in tvec_bases should tell the whole story. Something _nasty_
is going on.

addr2line on the run_timer_tasklet call: kernel/timer.c:359
This is with the patch that Ingo sent me about 6 hours ago. Andrew,
should I still test the one that you sent me this morning?

CPU: 7
EIP: 0060:[<80382bd2>] Not tainted
EFLAGS: 00010a02
EIP is at tvec_bases+0x7152/0x20400
eax: e4a2d9a0 ebx: 80382bd0 ecx: 80382bd8 edx: 80382fd0
esi: 80382bc8 edi: 80382b60 ebp: 00000001 esp: f4d71db0
ds: 0068 es: 0068 ss: 0068
Process httpd (pid: 2554, threadinfo=f4d70000 task=f4d727c0)
Stack: 8012038b 80382bd8 8b093288 00000000 f4d70000 8011d1e5 00000000
        8037b960 fffffffa 000000e0 80360264 80360264 8011ceea 8037b960
        00000001 00000001 e4bf0930 00000246 80257ed0 e4bf07c0 f4d71eec
Call Trace:
  [<8012038b>] run_timer_tasklet+0xcf/0x118
  [<8011d1e5>] tasklet_hi_action+0x85/0xe0
  [<8011ceea>] do_softirq+0x5a/0xac
  [<80257ed0>] tcp_sendmsg+0x10b8/0x11f4
  [<80273726>] inet_sendmsg+0x42/0x48
  [<8023bf0e>] sock_sendmsg+0x72/0x94
  [<8023c220>] sock_readv_writev+0x94/0xa0
  [<8023c29b>] sock_writev+0x37/0x40
  [<8013f94a>] do_readv_writev+0x186/0x278
  [<8023c07c>] sock_write+0x0/0xb0
  [<8013f4d7>] vfs_read+0xb7/0x128
  [<8013fb02>] sys_writev+0x5a/0x6c
  [<801070b3>] syscall_call+0x7/0xb

Code: 38 80 d0 2b 38 80 d8 2b 38 80 00 00 00 00 e0 2b 38 80 e0 2b
  <0>Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - not syncing

Dave Hansen

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