[OpenAFS-devel] Linux 2.6.10, OpenAFS 1.3.80 hangs

[Chaskiel M Grundman]

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 --On Tuesday, April 05, 2005 08:50:28 -0700 Miles Davis=20
<miles@cs.stanford.edu> wrote:

> I was wondering if anybody has seen this before before I investigate
> futher. I discovered multiple problems when I upgraded several FC2 boxes
> to kernel 2.6.10-1.770_FC2. Users of these machines began reporting weird
> hangs when running certain programs or, more often, running make. I've
> got  one source tree in particular that hangs a system like clockwork.
> The  system didn't freeze so much as stop responding. One could even
> background  the make after it hung, but that's about it. Running anything
> else hung.  The system still responded to pings.
I've seen something that may be similar. I was able to track it to pkmap=20
(high memory pte) exhaustion. If you can, do the following:

- make sure you are not running X
- trigger the hang
- hit Ctrl-ScrollLock on the console to get a stack trace of all processes.
- look through the traces (syslogd and klogd tend to still be operating=20
properly, so this data should also be available in the logs if you reboot)

if you see lots of
kmap_high+0x179/0x311
copy_strings+0x115/0x1e6
copy_strings_kernel+0x18/0x1e
do_execve+0x10f/0x1e6

or anything else that terminates in kmap_high, then this is the problem you =

have. I have been unable to track down any unbalanced kmap() call in afs,=20
but if this was not an afs-related problem, I would expect to be able to=20
find other reports on lkml or in redhat's bugzilla, but no such existed the =

last time I looked.

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