Date: Mon, 18 Nov 2002 11:39:01 -0800 From: Alfred Perlstein <alfred@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: current@FreeBSD.org, tanimura@FreeBSD.org Subject: Re: Lock order reversals in sys_pipe.c and kern_sig.c Message-ID: <20021118193901.GA16066@elvis.mu.org> In-Reply-To: <20021118190819.GK12906@rot13.obsecurity.org> References: <20021118190819.GK12906@rot13.obsecurity.org>
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* Kris Kennaway <kris@obsecurity.org> [021118 11:06] wrote: > I've just turned witness back on on the bento cluster, and got the > following lock order reversals a number of times overnight: > > Nov 18 07:45:40 <user.crit> gohan11 kernel: 1st 0xc6887200 pipe mutex (pipe mutex) @ /local0/src-client/sys/kern/sys_pipe.c:465 > Nov 18 07:45:40 <user.crit> gohan11 kernel: 2nd 0xc0447780 sigio lock (sigio lock) @ /local0/src-client/sys/kern/kern_sig.c:2225 > Nov 18 10:28:47 <user.crit> gohan10 kernel: 1st 0xc4941580 pipe mutex (pipe mutex) @ /local0/src-client/sys/kern/sys_pipe.c:1038 > [...] > > Are these known problems? Well now they are, I will investigate as time permits. I'm still in a holding pattern about adding more debugging info to lockd now that we're in release candidate mode. I may ask for a branch to be done, but i'm not sure yet. thank you, -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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