Date: Tue, 22 Mar 2011 05:49:49 +1100 (EST) From: Bruce Evans <brde@optusnet.com.au> To: David Malone <dwmalone@maths.tcd.ie> Cc: src-committers@FreeBSD.org, John Baldwin <jhb@FreeBSD.org>, svn-src-all@FreeBSD.org, Bruce Evans <brde@optusnet.com.au>, svn-src-head@FreeBSD.org, Jung-uk Kim <jkim@FreeBSD.org> Subject: Re: svn commit: r219676 - head/sys/x86/x86 Message-ID: <20110322054501.J3574@besplex.bde.org> In-Reply-To: <20110320094129.GA79235@walton.maths.tcd.ie> References: <201103151947.p2FJlK3L057573@svn.freebsd.org> <201103151701.11708.jhb@freebsd.org> <201103151714.15829.jkim@FreeBSD.org> <20110316155820.D4010@besplex.bde.org> <20110320094129.GA79235@walton.maths.tcd.ie>
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On Sun, 20 Mar 2011, David Malone wrote: > On Wed, Mar 16, 2011 at 04:34:10PM +1100, Bruce Evans wrote: >> Please revert. I use this for setting timecounters from userland. The >> sysctl is not a hack, but the primary user interface for managing the >> TSC frequency. The kern.timecounter.tc.TSC.frequency sysctl is >> secondary, and is readonly anyway, so it cannot be used to manage the >> TSC frequency or even the timecounter frequency. > > Some people have asked me if I can make kern.timecounter.tc.*.frequency > writeable. I have it on my list of jobs to look at, but haven't had > a chance yet. Are there any obvious problems with this? No new ones. Just the old ones of updating the frequency and all related variables without races. Bruce
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