Date: Thu, 29 Jul 2004 14:01:33 -0400 From: John Baldwin <jhb@FreeBSD.org> To: "Justin T. Gibbs" <gibbs@scsiguy.com> Cc: Perforce Change Reviews <perforce@FreeBSD.org> Subject: Re: PERFORCE change 58403 for review Message-ID: <200407291401.33538.jhb@FreeBSD.org> In-Reply-To: <A437589FD438D4483200878E@aslan.scsiguy.com> References: <200407282050.i6SKo9ci010595@repoman.freebsd.org> <A437589FD438D4483200878E@aslan.scsiguy.com>
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On Wednesday 28 July 2004 06:57 pm, Justin T. Gibbs wrote: > > http://perforce.freebsd.org/chv.cgi?CH=58403 > > > > Change 58403 by jhb@jhb_slimer on 2004/07/28 20:49:40 > > > > Prompted by some questions on IRC from gibbs@, scottl@, and others: > > atomic_store_rel() on ia32 does not actually need a lock > > ... > > > Differences ... > > > > ==== //depot/projects/smpng/sys/i386/include/atomic.h#13 (text+ko) ==== > > > > @@ -180,7 +180,7 @@ > > * XXX: This is _NOT_ safe on a P6 or higher because it does not > > guarantee * memory ordering. These should only be used on a 386. > > */ > > Is the above comment still accurate? For the load_acq, yes. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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