Date: Mon, 16 May 2016 10:56:35 -0700 From: John Baldwin <jhb@freebsd.org> To: Julian Elischer <julian@freebsd.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r299746 - in head/sys: cddl/dev/dtrace cddl/dev/dtrace/amd64 cddl/dev/dtrace/i386 cddl/dev/dtrace/powerpc conf dev/acpica dev/hwpmc dev/hyperv/vmbus dev/xen/control geom/eli kern net sy... Message-ID: <1993919.8YVJPRnaqB@ralph.baldwin.cx> In-Reply-To: <0539c5c3-dce8-1659-d26e-ef136f256f10@freebsd.org> References: <201605141822.u4EIMqkx090971@repo.freebsd.org> <0539c5c3-dce8-1659-d26e-ef136f256f10@freebsd.org>
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On Monday, May 16, 2016 01:25:56 PM Julian Elischer wrote: > On 15/05/2016 2:22 AM, John Baldwin wrote: > > Author: jhb > > Date: Sat May 14 18:22:52 2016 > > New Revision: 299746 > > URL: https://svnweb.freebsd.org/changeset/base/299746 > > > > Log: > > Add an EARLY_AP_STARTUP option to start APs earlier during boot. <snip> > > As a transition aid, the new behavior is available under a new kernel > > option (EARLY_AP_STARTUP). This will allow the option to be turned off > > if need be during initial testing. I plan to enable this on x86 by > > default in a followup commit in the next few days and to have all > > platforms moved over before 11.0. Once the transition is complete, > > the option will be removed along with the !EARLY_AP_STARTUP code. <snip> > John, This feels as though it should be settable with a tuneable > variable. Can you think > of a good way to do this other than having two sysinit entries and making > the tuneable "enable" the right one? There is no tuneable/sysinit > interaction otherwise. The idea is for the !EARLY_AP_STARTUP code to be temporary, so I think adding a tunable is probably a bit much to add in terms of overhead for something that should be temporary. -- John Baldwin
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