Date: Thu, 14 Oct 2004 20:47:47 +0100
From: Matthew Wilcox <matthew@wil.cx>
To: Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>
Cc: Dave Jones <davej@redhat.com>, Matthew Wilcox <matthew@wil.cx>,
       Brian Gerst <bgerst@didntduck.org>,
       "Martin K. Petersen" <mkp@wildopensource.com>,
       linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, akpm@osdl.org,
       tony.luck@intel.com
Subject: Re: [PATCH] General purpose zeroed page slab
Message-ID: <20041014194747.GV16153@parcelfarce.linux.theplanet.co.uk>
References: <yq1oej5s0po.fsf@wilson.mkp.net> <20041014173637.GQ16153@parcelfarce.linux.theplanet.co.uk> <20041014184915.GE18321@redhat.com> <200410142208.49831.vda@port.imtp.ilyichevsk.odessa.ua>
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On Thu, Oct 14, 2004 at 10:08:49PM +0300, Denis Vlasenko wrote:
> BTW, zeroing with non-temporal stores may be a huge win here.
> It is 300% faster on Athlon.

That assumes the page isn't going to be reused quickly.  The point of
slab is that the page does get reused quickly.  So you *want* the data
to be hot in cache.

-- 
"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain
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