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Date: Tue, 9 Nov 2004 19:24:45 +0300
From: "Andrey J. Melnikoff (TEMHOTA)" <temnota@kmv.ru>
To: linux-kernel@vger.kernel.org
Subject: [2.4.28-rc1] process stuck in release_task() call
Message-ID: <20041109162445.GM24130@kmv.ru>
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Hello!

With 2.4.28-pre3 and 2.4.28-rc1 i see strange situation - sendmail some
times get stuck into release_task() call. 

System - Tyan Tiger MPX, dual Athlon MP 2800+ with 1Gb memory.

--- SysRq-T output ---
ksymoops 2.4.9 on i686 2.4.28-rc1.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.28-rc1/ (default)
     -m /boot/System.map-2.4.28-rc1 (default)

Reading Oops report from the terminal
sendmail      S C012073D     0 15814      1 32701         14365 (NOTLB)
Using defaults from ksymoops -t elf32-i386 -a i386
Call Trace:    [<c012073d>] [<c0106582>] [<c0107717>]
sendmail      Z 00000000     4 30459  15814         30669       (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c011547d>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     0 30669  15814         30707 30459 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     4 30707  15814         31549 30669 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000  2624 31549  15814         31708 30707 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     0 31708  15814         32269 31549 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     0 32269  15814         32352 31708 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000    20 32352  15814         32403 32269 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     0 32403  15814         32413 32352 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000   624 32413  15814         32468 32403 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     0 32468  15814         32473 32413 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     0 32473  15814         32482 32468 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
sendmail      Z 00000000     0 32482  15814         32499 32473 (L-TLB)
Call Trace:    [<c0120f53>] [<c0121600>] [<c0121725>] [<c0107717>]
..... many sendmail zombies ......

Warning (Oops_read): Code line not seen, dumping what data is available

Proc;  sendmail

>>EIP; c012073d <release_task+1fd/230>   <=====

Trace; c012073d <release_task+1fd/230>
Trace; c0106582 <sys_rt_sigsuspend+122/160>
Trace; c0107717 <system_call+33/38>
Proc;  sendmail

>>EIP; 00000000 Before first symbol

Trace; c0120f53 <exit_notify+103/3c0>
Trace; c0121600 <do_exit+3f0/4e0>
Trace; c011547d <smp_apic_timer_interrupt+12d/130>
Trace; c0121725 <sys_exit+15/20>
Trace; c0107717 <system_call+33/38>
Proc;  sendmail

>>EIP; 00000000 Before first symbol

Trace; c0120f53 <exit_notify+103/3c0>
Trace; c0121600 <do_exit+3f0/4e0>
Trace; c0121725 <sys_exit+15/20>
Trace; c0107717 <system_call+33/38>
Proc;  sendmail

.... same trace with other zombies ......


disassemble show other result - process stuck into free_pages() call:

c0120540 <release_task>:
c0120540:       55                      push   %ebp
....
c0120736:       89 d8                   mov    %ebx,%eax
c0120738:       e8 73 dd 01 00          call   c013e4b0 <free_pages> <= here
c012073d:       83 c4 10                add    $0x10,%esp
c0120740:       5b                      pop    %ebx
c0120741:       5e                      pop    %esi
c0120742:       c9                      leave
....

Any hints ?

-- 
 Best regards, TEMHOTA-RIPN aka MJA13-RIPE
 System Administrator. mailto:temnota@kmv.ru

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