Date: Fri, 27 May 2005 15:44:41 +0200 From: Marc Olzheim <marcolz@stack.nl> To: Robert Watson <rwatson@FreeBSD.org> Cc: Marc Olzheim <marcolz@stack.nl>, freebsd-stable@freebsd.org, bug-followup@FreeBSD.org Subject: Re: kern/78824: race condition close()ing and read()ing the same socketpair on SMP. Message-ID: <20050527134441.GA94234@stack.nl> In-Reply-To: <20050527124531.U727@fledge.watson.org> References: <20050503150014.GG17096@stack.nl> <20050510131005.GA4083@stack.nl> <20050527124531.U727@fledge.watson.org>
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On Fri, May 27, 2005 at 12:47:28PM +0100, Robert Watson wrote: > Hmm. I'm unable to reproduce this on local SMP hardware, although I can > see at least one way that the race could occur. Could you try the > attached patch and see if it helps matters? This is a slight shot in the > dark but closes at least two races in the transition of socket state with > respect to socket buffer state. I'll cvsup back to 2005.05.03 (where I can reproduce it easily) and apply your patch and see what happens. Race conditions and reproducability are not terms that go together well. :-( Marc
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