Date: Tue, 21 Sep 2010 13:47:28 -0400 From: John Baldwin <jhb@freebsd.org> To: Matthew Jacob <mj@feral.com> Cc: svn-src-head@freebsd.org, mdf@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Andriy Gapon <avg@freebsd.org> Subject: Re: svn commit: r212964 - head/sys/kern Message-ID: <201009211347.28800.jhb@freebsd.org> In-Reply-To: <4C98E324.8090803@feral.com> References: <201009211507.o8LF7iVv097676@svn.freebsd.org> <201009211250.40704.jhb@freebsd.org> <4C98E324.8090803@feral.com>
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On Tuesday, September 21, 2010 12:53:56 pm Matthew Jacob wrote: > > > Err, I don't think _mtx_lock_sleep() is guarded in that fashion? I have an > > old patch to do that but have never committed it. If we want that we should > > probably change rwlocks and sxlocks to have also not block when panicstr is > > set. > > Seems to me you are backing into interesting territory here- getting a > bit more like Solaris. > > If you *do* do this, then you really *do* need to stop all other CPUs > when you panic, or else it's likely you'll double panic more often than not. Yes, I don't dispute this. -- John Baldwin
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