Date: Mon, 21 Feb 2011 18:29:17 +0200 From: Andriy Gapon <avg@freebsd.org> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-hackers@freebsd.org, freebsd-stable@freebsd.org Subject: Re: machdep.hlt_cpus not safe with ULE? Message-ID: <4D6292DD.8010704@freebsd.org> In-Reply-To: <8332E9240ECA403480B48D21FA3A8694@multiplay.co.uk> References: <8332E9240ECA403480B48D21FA3A8694@multiplay.co.uk>
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on 19/02/2011 14:36 Steven Hartland said the following: > I'm trying to debug a possibly failing CPU, so I thought it would > be easy just disable the cores using machdep.hlt_cpus and see if > we see the panic's we've been seeing. > > The problem is it seems ULE doesnt properly support machdep.hlt_cpus > and still schedules processes onto the halted cpus which obviously > causes problems. > > Can anyone confirm this behaviour? Yes, your observations are correct. Please also see: http://www.freebsd.org/cgi/query-pr.cgi?pr=145385 > Should machdep.hlt_cpus and I assume > the logical counterpart never be used with ULE? -- Andriy Gapon
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