From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.2) Gecko/20031013 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): How reproducible: Didn't try Additional info:
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: http://people.redhat.com/anderson/.nfs_kmap_nonblock
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. http://rhn.redhat.com/errata/RHSA-2004-437.html