[OpenAFS-devel] Re: Kernel oops, using openafs-1.2.6-rc1

[chas williams]

In message <3D451F38.2A418E6F@lrz-muenchen.de>,Herbert Huber writes:
>Today another strange problem occured on our central mail server. The machine 
>had a pop and imap
>induced load of more than 50. Even new login processes consumed more than 20% 
>of system time
>(popd or imapd running under uid 0!). No kernel oops or syslog messages for th
>is problem.  Please
>note that nearly all CPU time was spent for system time.

its hard to say.  there really isnt much to go on here.  if you suspect
afs is a problem use fstrace to take a peek at what afs is doing.  again
try changing MAX_KMALLOC_SIZE to PAGE_SIZE and see if that makes any
difference.

it starting to sound like a memory leak somewhere though.  you might take
a look at /proc/meminfo and /proc/slabinfo when the system is running
normally.  when it gets sick, look again.  afs will run quite slow if
there is a memory shortage (since it will wait for memory to become 
available and block all afs operations until such time)