Messages in this thread |  | | Date | Sat, 1 Dec 2001 19:11:13 -0800 | From | William Lee Irwin III <> | Subject | [BUG] wait_for_devfsd_finished deadlock |
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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/
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