Date: Fri, 5 Oct 2007 20:01:19 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Darren Reed <darrenr@freebsd.org> Cc: freebsd-fs@FreeBSD.org, freebsd-current@FreeBSD.org Subject: Re: ZFS kmem_map too small. Message-ID: <20071005180119.GE98210@garage.freebsd.pl> In-Reply-To: <47060857.2070001@freebsd.org> References: <20071005000046.GC92272@garage.freebsd.pl> <47060857.2070001@freebsd.org>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --] 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@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFHBnvvForvXbEpPzQRAgBVAKC9Mc5wGMyVvTO4KJhR02b7R0YZagCgkyxI 09PL4bks02BwfknklC1ZNWM= =Ws0m -----END PGP SIGNATURE-----help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20071005180119.GE98210>