On Fri, Oct 05, 2007 at 02:48:07AM -0700, Darren Reed wrote: > Pawel Jakub Dawidek wrote: > > Hi. > > > > We'are about to branch RELENG_7 and I'd like to start discussion with > > folks that experience 'kmem_map too small' panic with the latest HEAD. > > > > I'm trying hard to reproduce it and I can't, so I need to gather more > > info how you are able to provoke this panic. > > Hmm, the first and only time it happened to me was when running cvsup > on the rsync'd freebsd CVS tree after creating a snapshot of it. I've > repeated that exercise since (and many times before) with no problems. > > That was when I mistakingly had the ARC max set to be maybe 10MB or > so smaller than the kmem_map size (this was a mistake.) I've since > grown that gap to 100MB. > > Tips on how to reproduce it? Make the kmem_map size small and set the > ARC's maximum size to be the same as it ? :) I'm not really interested in fixing configuration bugs, although we should do as much as we can to not allow bugus tunnings. I'm most interested in 'kmem_map too small' panic with default configuration, ie. no other changes than vm.kmem_size/vm.kmem_size_max. -- Pawel Jakub Dawidek http://www.wheel.pl pjd_at_FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am!
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