lkml.org 
[lkml]   [2001]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject[BUG] wait_for_devfsd_finished deadlock
While testing 2.4.17-pre1 with some other patches, a situation
reminiscent of a deadlock arose. mutt(1) would block indefinitely
while opening a large mbox, and all further calls to sys_open()
would block indefinitely.

After some further testing to isolate the problem, I reproduced
this behavior in the vanilla 2.4.17-pre1 kernel. The sysrq output showed
a number of processes with the following call trace in the devfs core:


Dec 1 17:29:26 holomorphy kernel: sh D C02A2A00 0 821 806
(NOTLB)
Dec 1 17:29:26 holomorphy kernel: Call Trace: [wait_for_devfsd_finished+170/208
] [devfs_d_revalidate_wait+135/160] [devfs_lookup+409/448] [d_alloc+27/400] [rea
l_lookup+83/192]
Dec 1 17:29:26 holomorphy kernel: [link_path_walk+1310/1888] [path_walk+26/3
2] [open_namei+131/1488] [filp_open+59/96] [sys_open+56/192] [system_call+51/56]


And the following call traces elsewhere:


Dec 1 17:29:26 holomorphy kernel: cron S E3540000 0 852 633
853 855 827 (NOTLB)
Dec 1 17:29:26 holomorphy kernel: Call Trace: [pipe_wait+124/176] [pipe_read+17
9/512] [sys_read+150/208] [system_call+51/56]


Dec 1 17:29:26 holomorphy kernel: procmail S E2395ED8 0 881 880
882 (NOTLB)
Dec 1 17:29:26 holomorphy kernel: Call Trace: [interruptible_sleep_on_locked+11
6/192] [locks_block_on+28/48] [posix_lock_file+178/1232] [fcntl_setlk+335/512] [
do_fcntl+318/512]


Dec 1 17:29:26 holomorphy kernel: exim S 00000000 0 905 899
907 (NOTLB)
Dec 1 17:29:26 holomorphy kernel: Call Trace: [sys_wait4+862/912] [system_call+
51/56]



Further diagnostic information is available upon request.

Mr. Gooch, your attention to this matter is much appreciated.



Thanks,
Bill
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:13    [W:0.085 / U:0.624 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site