Date: Fri, 2 Nov 2007 10:05:27 -0800 (PST) From: Jeff Roberson <jroberson@chesapeake.net> To: Michael <michael@gameservice.ru> Cc: stable@freebsd.org Subject: Re: Bug Message-ID: <20071102100437.X544@10.0.0.1> In-Reply-To: <518392548.20071102014145@gameservice.ru> References: <518392548.20071102014145@gameservice.ru>
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On Fri, 2 Nov 2007, Michael wrote: > Hello, i know that you are working on freebsd scheduler, probably this > bug have relation to your work: > > After upgrading to Freebsd 7 (from RELENG_6), postgresql coredumps several > times per day. I asked mail list pgsql-bugs and got answer that this > is probably due to changes in scheduler (i tried both SCHED_ULE and > SCHED_4BSD): > http://www.nabble.com/PostgreSQL-crash-on-Freebsd-7-t4693969.html > I hope you don't mind me forwarding this to stable. Does this problem occur with the 4BSD scheduler? Is your system swapping? >> What seems like a reasonable bet at this point is that the FBSD7 >> kernel's scheduler has been changed in a way that makes it possible for >> it to sometimes not schedule a process for a very long time (order of a >> couple minutes). If that happened while the process was holding a >> spinlock then other processes waiting to get the spinlock would fail >> like this > > Can you dig into this problem? > > > If this is incorrect email to ask for help, then sorry for > disturbing. > > > > > Michael >
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