Date: Wed, 10 Feb 2010 16:52:13 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: David Xu <davidxu@FreeBSD.org> Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, mono@FreeBSD.org Subject: Re: svn commit: r203657 - head/sys/kern Message-ID: <20100210165213.95990l8r0b7latrk@webmail.leidinger.net> In-Reply-To: <201002080731.o187V5Pk072517@svn.freebsd.org> References: <201002080731.o187V5Pk072517@svn.freebsd.org>
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Quoting David Xu <davidxu@FreeBSD.org> (from Mon, 8 Feb 2010 07:31:05 +0000 (UTC)): > Author: davidxu > Date: Mon Feb 8 07:31:05 2010 > New Revision: 203657 > URL: http://svn.freebsd.org/changeset/base/203657 > > Log: > Set waiters flag before checking semaphore's counter, > otherwise we might lose a wakeup. Tested on postgresql database server. Uhm... if I ktrace a hanging process and I see some semop()s (I assume it is waiting on some event to happen), where on Linux this process is working correctly, then I would like to test this patch to see if the process still has the same problem? Or differently asked: this affects the operation of semop(2)? Bye, Alexander. -- We only acknowledge small faults in order to make it appear that we are free from great ones. -- LaRouchefoucauld http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137
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