Date: Mon, 2 May 2005 14:04:29 -0400 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-amd64@FreeBSD.org Subject: Re: Opteron deadlock fix committed Message-ID: <200505021404.30212.jhb@FreeBSD.org> In-Reply-To: <20050501134749.X3887@carver.gumbysoft.com> References: <20050501134749.X3887@carver.gumbysoft.com>
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On Sunday 01 May 2005 04:48 pm, Doug White wrote: > Hey folks, > > Yesterday I committed a workaround for a deadlock condition in RELENG_5 > and RELENG_5_4 caused by errata in AMD Opteron and Athlon64 processors. > (-CURRENT after April 8 is not affected due to changes in critical > sections.) Actually, current is still busted because even though critical sections don't disable interrupts, spin locks still do, and we do the spin loop in the TLB shootdowns with the smp_ipi_mtx spin lock held. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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