Red Hat Bugzilla – Bug 200013
Access to nfs mount hangs with kernel-2.6.17-1.2142_FC4
Last modified: 2007-11-30 17:11:38 EST
Created attachment 132947 [details]
Description of problem:
Since booting kernel-2.6.17-1.2142_FC4 (and -1.2141), this system will
periodically lock up while accessing a NFS mount. I've attached partial output
from a process trace (all that dmesg could capture). There is a hung idl
process, as well as a couple ps processes that are hung.
it appears all the process in the NFS code seem to be trying
to flush pages out... But I guess the hang comes from the
fact that pdflush is also trying to free pages... Note how
its sleeping in nfs_wait_on_request().... So at the end
of the day it appears we are in a low memory situation...
A couple of things, 1) is there any network traffic going to
the server during this period? If so, what type messages
are they? 2) Could you please post a sysctl-M memory
[This comment added as part of a mass-update to all open FC4 kernel bugs]
FC4 has now transitioned to the Fedora legacy project, which will continue to
release security related updates for the kernel. As this bug is not security
related, it is unlikely to be fixed in an update for FC4, and has been migrated
Please retest with Fedora Core 5.
Have not had a reoccurrence recently. Closing for now.