Date: Fri, 02 Dec 2016 08:18:13 -0800 From: John Baldwin <jhb@freebsd.org> To: Warner Losh <imp@bsdimp.com> Cc: hiren panchasara <hiren@strugglingcoder.info>, Warner Losh <imp@freebsd.org>, src-committers <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org> Subject: Re: svn commit: r309351 - head/etc/defaults Message-ID: <3180246.4fqia12Gik@ralph.baldwin.cx> In-Reply-To: <CANCZdfp%2BOS%2BcePwvhMq%2BPeqnWycsBjjng287zbAefZCG690OHA@mail.gmail.com> References: <201612010435.uB14Zh21020050@repo.freebsd.org> <20161201164807.GE27291@strugglingcoder.info> <CANCZdfp%2BOS%2BcePwvhMq%2BPeqnWycsBjjng287zbAefZCG690OHA@mail.gmail.com>
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On Thursday, December 01, 2016 02:41:41 PM Warner Losh wrote: > On Thu, Dec 1, 2016 at 9:48 AM, hiren panchasara > <hiren@strugglingcoder.info> wrote: > > On 12/01/16 at 04:35P, Warner Losh wrote: > >> Author: imp > >> Date: Thu Dec 1 04:35:43 2016 > >> New Revision: 309351 > >> URL: https://svnweb.freebsd.org/changeset/base/309351 > >> > >> Log: > >> Revert the 'performance' setting to 'NONE' from C2. > > > > Just a note that this commit reverts r282110. > > Yea, it's good for laptops, bad for servers. At least there's some > Intel CPUs that this causes corruption with USB. That's being sorted > out, but until that's done we need to fail more safe for our primary > market. It's also good for some servers as you need some cores in C-states to get the maximum Turbo Boost on other cores (though that may have been more true for earlier generations of i7 CPUs than more recent generations). -- John Baldwin
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