Red Hat Bugzilla – Bug 114960
nfs layer livelocks after after using up all of the kmap space
Last modified: 2013-03-06 00:56:41 EST
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Description of problem:
Some of the rpc layer calls kmap in the the same thread. This can lead
to livelock when there are lots of threads and i/o. ie high load. This
bug is being created to track a number of places where this bug has
been hit. related bz #89453, bz #114209, and bz #58216. Issue tracker
is: it #33097.
Version-Release number of selected component (if applicable):
ABI issues might be a pain on this one but i'm adding to the blocker
list, since this is a serious and prevalent issue.
we can use this 'tracker' bug to mark progress. Dave Anderson is
currently building a kernel through beehive, that we can give out to
test to partners.
Binary RPMs containing test kernels can found in:
ok, we've fixed this by adding the nfs module parameters, which should
be set as: nfs_max_request_hard=60 nfs_max_request_soft=30. Fix is in U5.
*** Bug 114209 has been marked as a duplicate of this bug. ***
An errata has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.