Date: Thu, 1 Mar 2012 16:37:25 +0400 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Gavin Atkinson <gavin@FreeBSD.org> Cc: svn-src-stable@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, svn-src-stable-9@freebsd.org Subject: Re: svn commit: r230266 - in stable/9/sys: amd64/amd64 i386/i386 Message-ID: <20120301123725.GF97848@zxy.spb.ru> In-Reply-To: <201201171352.q0HDq5n2092953@svn.freebsd.org> References: <201201171352.q0HDq5n2092953@svn.freebsd.org>
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On Tue, Jan 17, 2012 at 01:52:05PM +0000, Gavin Atkinson wrote: > Author: gavin > Date: Tue Jan 17 13:52:04 2012 > New Revision: 230266 > URL: http://svn.freebsd.org/changeset/base/230266 > > Log: > Merge r229085 from head: > > Default to not performing the early-boot memory tests when we detect we > are booting inside a VM. There are three reasons to disable this: > > o It causes the VM host to believe that all the tested pages or RAM are > in use. This in turn may force the host to page out pages of RAM > belonging to other VMs, or otherwise cause problems with fair resource > sharing on the VM cluster. > o It adds significant time to the boot process (around 1 second/Gig in > testing) > o It is unnecessary - the host should have already verified that the > memory is functional etc. > > Note that this simply changes the default when in a VM - it can still be > overridden using the hw.memtest.tests tunable. > > Early MFC requested by: bz How about similar behaviour for /boot/loader?
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