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SubjectRe: unix sockets problems in 2.5.4-pre6?
Hello!

On Mon, Feb 11, 2002 at 12:49:53AM -0800, David S. Miller wrote:

> It doesn't help. You need to find the backtrace of the other process
> holding the lock the AF_UNIX code wants as well, dumping just these
> few processes isn't enough.
Ok. I do not know how to find who is holding teh lock, so here is full list of
processes:

SysRq : Show State

free sibling
task PC stack pid father child younger older
init S C2133F30 48 1 0 761 (NOTLB)
Call Trace: [__pollwait+142/160] [schedule_timeout+128/160] [process_timeout+0/16] [do_select+470/544] [sys_select+832/1152]
[syscall_call+7/11]
keventd S C2139424 48 2 1 3 (L-TLB)
Call Trace: [context_thread+326/544] [kernel_thread+40/64]
ksoftirqd_CPU S F7DEE000 48 3 1 4 2 (L-TLB)
Call Trace: [ksoftirqd+171/240] [kernel_thread+40/64]
ksoftirqd_CPU S F7DEC000 48 4 1 5 3 (L-TLB)
Call Trace: [ksoftirqd+171/240] [kernel_thread+40/64]
kswapd S F7DDC000 816 5 1 6 4 (L-TLB)
Call Trace: [exit_files+49/64] [kswapd+137/196] [kernel_thread+40/64]
bdflush S 00000286 48 6 1 7 5 (L-TLB)
Call Trace: [interruptible_sleep_on+78/112] [bdflush+213/224] [kernel_thread+40/64]
kupdated S F7D99FCC 48 7 1 9 6 (L-TLB)
Call Trace: [__refile_buffer+84/96] [schedule_timeout+128/160] [process_timeout+0/16] [kupdate+243/384] [kernel_thread+40/64]
khubd S 00000286 48 9 1 11 7 (L-TLB)
Call Trace: [interruptible_sleep_on+78/112] [usb_hub_thread+79/176] [kernel_thread+40/64]
kreiserfsd S F776DFB4 688 11 1 108 9 (L-TLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [interruptible_sleep_on_timeout+82/128] [reiserfs_journal_commit_thread+261/368] [kernel_thread+40/64]
scsi_eh_0 S F7349FDC 48 108 1 313 11 (L-TLB)
Call Trace: [__down_interruptible+138/256] [__down_failed_interruptible+7/12] [.text.lock.scsi_error+197/218] [kernel_thread+40/64]
sshd S 7FFFFFFF 48 313 1 329 108 (NOTLB)
Call Trace: [schedule_timeout+20/160] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
syslogd S 7FFFFFFF 52 329 1 332 313 (NOTLB)
Call Trace: [datagram_poll+36/214] [schedule_timeout+20/160] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
klogd R F7252000 48 332 1 379 329 (NOTLB)
Call Trace: [do_syslog+212/960] [kmsg_read+17/32] [sys_read+150/208] [syscall_call+7/11]
atd S F7247F8C 624 379 1 410 332 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [sys_nanosleep+282/481] [syscall_call+7/11]
in.identd S 7FFFFFFF 48 410 1 412 570 379 (NOTLB)
Call Trace: [schedule_timeout+20/160] [wait_for_connect+259/480] [tcp_accept+186/576] [inet_accept+44/448] [sys_accept+102/256]
[schedule+950/1024] [sys_socketcall+179/512] [syscall_call+7/11]
in.identd S F7289F2C 48 412 410 414 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [do_poll+197/240] [sys_poll+477/742] [syscall_call+7/11]
in.identd S F722FFB0 48 413 412 414 (NOTLB)
Call Trace: [sys_rt_sigsuspend+282/320] [syscall_call+7/11]
in.identd S F722DFB0 48 414 412 413 (NOTLB)
Call Trace: [sys_rt_sigsuspend+282/320] [syscall_call+7/11]
pickup Z C212E180 48 522 520 523 (L-TLB)
Call Trace: [do_exit+745/784] [sys_exit+14/16] [syscall_call+7/11]
qmgr S F70FBF30 48 523 520 524 522 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
tlsmgr S F70F5F30 8944 524 520 523 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
kdm S F7085FB0 560 570 1 600 599 410 (NOTLB)
Call Trace: [sys_rt_sigsuspend+282/320] [syscall_call+7/11]
X S F708BF30 48 596 570 600 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
ntpd S 7FFFFFFF 48 599 1 615 570 (NOTLB)
Call Trace: [datagram_poll+36/214] [schedule_timeout+20/160] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
kdm S F7066000 48 600 570 751 596 (NOTLB)
Call Trace: [pipe_wait+129/176] [pipe_read+179/512] [sys_read+150/208] [syscall_call+7/11]
cron S F7039F8C 48 615 1 662 599 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [sys_nanosleep+282/481] [syscall_call+7/11]
gpm S F6F69F30 48 662 1 742 615 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
login S 00000000 48 742 1 762 743 662 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
login S 00000000 48 743 1 775 744 742 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
login S 00000000 48 744 1 788 745 743 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
login S 00000000 48 745 1 801 746 744 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
login S 00000000 48 746 1 814 747 745 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
login S 00000000 48 747 1 827 761 746 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
kdm_greet S F6E21F30 48 751 600 (NOTLB)
Call Trace: [schedule_timeout+128/160] [process_timeout+0/16] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
xconsole S 7FFFFFFF 48 761 1 747 (NOTLB)
Call Trace: [__pollwait+142/160] [schedule_timeout+20/160] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
bash S 00000000 48 762 742 840 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
bash S 7FFFFFFF 48 775 743 (NOTLB)
Call Trace: [schedule_timeout+20/160] [read_chan+892/1920] [read_chan+973/1920] [tty_read+220/320] [sys_read+150/208]
[syscall_call+7/11]
bash S 7FFFFFFF 496 788 744 (NOTLB)
Call Trace: [schedule_timeout+20/160] [read_chan+892/1920] [read_chan+973/1920] [tty_read+220/320] [sys_read+150/208]
[syscall_call+7/11]
bash S 7FFFFFFF 48 801 745 (NOTLB)
Call Trace: [schedule_timeout+20/160] [read_chan+892/1920] [read_chan+973/1920] [tty_read+220/320] [sys_read+150/208]
[syscall_call+7/11]
bash S 00000000 48 814 746 864 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
bash S 00000000 48 827 747 878 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
su S 00000000 48 840 762 841 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
bash S 7FFFFFFF 48 841 840 900 (NOTLB)
Call Trace: [schedule_timeout+20/160] [read_chan+892/1920] [read_chan+973/1920] [tty_read+220/320] [sys_read+150/208]
[syscall_call+7/11]
su S 00000000 48 864 814 865 (NOTLB)
Call Trace: [sys_wait4+958/1024] [syscall_call+7/11]
bash S 7FFFFFFF 48 865 864 (NOTLB)
Call Trace: [schedule_timeout+20/160] [read_chan+892/1920] [read_chan+973/1920] [tty_read+220/320] [sys_read+150/208]
[syscall_call+7/11]
slogin S 7FFFFFFF 48 878 827 (NOTLB)
Call Trace: [schedule_timeout+20/160] [do_select+470/544] [sys_select+832/1152] [syscall_call+7/11]
strace S 00000000 48 900 841 520 (NOTLB)
Call Trace: [sys_rt_sigaction+152/320] [sys_wait4+958/1024] [syscall_call+7/11]
master R F773F744 48 520 900 524 (NOTLB)
Call Trace: [__write_lock_failed+9/32] [.text.lock.open+71/137] [unix_create+92/112] [sock_map_fd+12/304] [select_bits_free+10/16]
[sys_socket+29/96] [sys_socket+48/96] [sys_socketcall+99/512] [syscall_call+7/11]

BTW, this is on SMP.

Bye,
Oleg
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