Date: Mon, 24 Sep 2007 11:33:13 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: Borja Marcos <BORJAMAR@SARENET.ES> Cc: freebsd-hackers@freebsd.org, Benjie Chen <benjie@addgene.org> Subject: Re: Kernel panic on PowerEdge 1950 under certain stress load Message-ID: <46F78459.4060607@FreeBSD.org> In-Reply-To: <FADD8244-DE07-4AA7-8EF0-C49257D4746B@SARENET.ES> References: <c53be070709211526j2178ebb7ia6ea39e1a5df303c@mail.gmail.com> <FADD8244-DE07-4AA7-8EF0-C49257D4746B@SARENET.ES>
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Borja Marcos wrote: > > On 22 Sep 2007, at 00:26, Benjie Chen wrote: > >> FreeBSD 6.2 on PowerEdge 1950, RAID1 setup with mfi driver (PERC5i). 4GB >> RAM. I am currently running i386, and not amd64, due to various reasons. >> >> Kernel panic is at 0xC066C731, which from nm shows it's in mtx_lock_spin >> c066c7b4 T _mtx_lock_spin >> c066c85c T _mtx_unlock_sleep >> >> So this could mean that independent stress tests will not result in >> panic if >> there aren't enough concurrency to cause the problem. > > I don't have the exact IP address involved, but we experienced > consistent panics in two heavily loaded mail servers (same hardware > models, Dell Powereedge) runnning Postfix and FreeBSD 6.2. > > Suspecting an issue with the IP stack and smp I tried to set > "debug.mpsafenet=0" and the problems are gone. Of course I've lost some > performance, but the systems have been solid for some weeks so far. What number is the PR with the details? Kris
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