Date: Sun, 2 May 2004 00:27:22 +0200 From: Stefan Bethke <stb@lassitu.de> To: Kris Kennaway <kris@obsecurity.org> Cc: John Uhlig <juhlig@parc.com> Subject: Re: kmem_malloc crashes running FreeBSD 5.2.1-RELEASE-p5 Message-ID: <B6D33856-9BBE-11D8-9E08-000A95C893E4@lassitu.de> In-Reply-To: <20040429000158.GA61693@xor.obsecurity.org> References: <409024D6.7090800@parc.com> <20040429000158.GA61693@xor.obsecurity.org>
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Am 29.04.2004 um 02:01 schrieb Kris Kennaway: > On Wed, Apr 28, 2004 at 02:40:38PM -0700, John Uhlig wrote: >> On the web, freebsd mailing lists and bug lists, I have seen existing >> thread about "kmem_malloc and kmem_map too small" problems - but no >> evidence of a fix or patch. We experienced the same problem running >> 4.9 but were able to fix it by setting the MAXMEM option in our >> kernel conf file to a value 1GB less than actual physical memory >> size. This does not help with 5.2.1-RELEASE-p5. >> > See PR 53416. You just need to tune your kernel resource allocation > to deal with the large amount of memory your system has. I recently enquired about advice for this exact situation on -current (see http://lists.freebsd.org/pipermail/freebsd-current/2004-April/ 026065.html), but didn't really get any. The PR does not give advice on which parameters in which way, or list a solution. My own experimentation has been inconclusive; the machine still panics when running the daily scripts. I'm running a cron job every minute to record various vm statistics now; hopefully this will give me further pointers. How does PAE affect this? My box has 6 GB, but I have disabled PAE for the moment. And just for clarification: the panic is with basically no load, just some file system pressure (two jails running the daily scripts); otherwise, the machine is unused. Stefan -- Stefan Bethke <stb@lassitu.de> Fon +49 170 346 0140
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