From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Date: Thu, 14 Oct 2004 19:47:47 +0000 Subject: Re: [PATCH] General purpose zeroed page slab Message-Id: <20041014194747.GV16153@parcelfarce.linux.theplanet.co.uk> List-Id: References: <20041014173637.GQ16153@parcelfarce.linux.theplanet.co.uk> <20041014184915.GE18321@redhat.com> <200410142208.49831.vda@port.imtp.ilyichevsk.odessa.ua> In-Reply-To: <200410142208.49831.vda@port.imtp.ilyichevsk.odessa.ua> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Denis Vlasenko Cc: Dave Jones , Matthew Wilcox , Brian Gerst , "Martin K. Petersen" , linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, akpm@osdl.org, tony.luck@intel.com 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