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Fedora 7 development - automount taking 100% CPU



I've got a very strange one here. Fedora 7 with development repo, up to date as of about 48 hours ago.

After boot, automount takes 100% of CPU, according to 'top'.

top - 23:41:18 up 9 min,  3 users,  load average: 3.06, 2.73, 1.31
Tasks: 140 total,   1 running, 139 sleeping,   0 stopped,   0 zombie
Cpu(s): 24.3%us, 0.8%sy, 0.0%ni, 74.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem:   8110068k total,  8027108k used,    82960k free,    44944k buffers
Swap:        0k total,        0k used,        0k free,  7523048k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2886 root 20 0 28564 1244 936 S 100 0.0 6:00.18 automount

Fair enough, but when I 'strace' automount, I just see:

# strace -p 2886
Process 2886 attached - interrupt to quit
rt_sigtimedwait(~[CHLD CONT RTMIN RT_1],

(and it just hangs there).

While 'strace' is hanging, automount is still (according to top at least) consuming 100% CPU. I tried thinking about threads, but it seems like automount is just a single thread from what I can tell.

Any ideas?

# uname -a
Linux amd 2.6.23-0.139.rc3.git10.fc8 #1 SMP Sun Aug 26 19:23:52 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux

BTW, I'm using the previous kernel above, because the latest kernel 2.6.23-0.185.rc6.git7 seemed to be causing the machine to power-off under load, which I guess might indicate a hardware problem although the machine has not suffered hardware problems up til now. In any case could hardware cause the strangeness above?

BTW#2, I stopped the autofs service and automount went away -- I never use automount anyhow.

Rich.

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