Date: Thu, 31 Mar 2011 20:07:17 +0200 (CEST) From: Yamagi Burmeister <lists@yamagi.org> To: YongHyeon PYUN <pyunyh@gmail.com> Cc: freebsd-net@freebsd.org, Yamagi Burmeister <lists@yamagi.org>, yongari@freebsd.org Subject: Re: Kernel memory corruption(?) with age(4) Message-ID: <alpine.BSF.2.00.1103311951060.2217@maka.home.yamagi.org> In-Reply-To: <20110331171302.GA11981@michelle.cdnetworks.com> References: <alpine.BSF.2.00.1103301620110.17846@saya.home.yamagi.org> <20110330173145.GB8601@michelle.cdnetworks.com> <alpine.BSF.2.00.1103302137330.1646@maka.home.yamagi.org> <20110330202858.GC8601@michelle.cdnetworks.com> <alpine.BSF.2.00.1103310859310.3082@saya.home.yamagi.org> <20110331171302.GA11981@michelle.cdnetworks.com>
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On Thu, 31 Mar 2011, YongHyeon PYUN wrote: >> All boxes are quadcore machines with 8GB RAM, running FreeBSD/amd64. >> After limiting the memory via hw.physmem to 3GB the problems are gone. >> The box is running crashfree for more than 6 hours and has served over >> 300GB of data via age(4). >> > > Thanks for testing. Remove the hw.physmem configuration and try > attached patch and let me know how it goes. Thanks for your help, but the patch doesn't work. Another random panic - this time "page fault in kernel mode" - with nothing age(4) or network stack related stuff in the backtrace... Maybe it'll help to know about a bug fix in the linux atl1 driver, now replaced by atlx. In git commit 5f08e46b621a769e52a9545a23ab1d5fb2aec1d4 64 bit DMA was disabled: 64-bit DMA causes data corruption with atl1. We don't know why, and Atheros is working on it. For now, just use 32-bit DMA. This is a big hack that is probably wrong, but it stops the bleeding. There was no later follow up on it. I think that this can't be problem on FreeBSD but maybe I'm reading the driver code wrong. The kernel.org gitweb URL is: http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.23.y.git;a=commitdiff;h=5f08e46b621a769e52a9545a23ab1d5fb2aec1d4 -- Homepage: www.yamagi.org Jabber: yamagi@yamagi.org GnuPG/GPG: 0xEFBCCBCB
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