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Date: Sat, 13 Mar 2010 02:08:51 +0100 (CET) From: Thomas Gleixner <tglx@...utronix.de> To: Suresh Siddha <suresh.b.siddha@...el.com> cc: Robin Holt <holt@....com>, Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, "Pallipadi, Venkatesh" <venkatesh.pallipadi@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, "x86@...nel.org" <x86@...nel.org> Subject: Re: [Patch] x86,pat Update the page flags for memtype atomically instead of using memtype_lock. On Fri, 12 Mar 2010, Suresh Siddha wrote: > On Thu, 2010-03-11 at 08:17 -0800, Robin Holt wrote: > > Changes since -V1: > > 1) Introduce atomically setting and clearing the page flags and not > > using the global memtype_lock to protect page->flags. > > > > 2) This allowed me the opportunity to convert the rwlock back into a > > spinlock and not affect _MY_ tests performance as all the pages my test > > was utilizing are tracked by struct pages. > > Can you also include this spinlock to rwlock conversion, which can be > used for non RAM pages as a second patch? spinlock -> rwlock conversion ? I hope you meant it the other way round as Robin said in #2 :) And yes it should be a separate patch. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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