From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 17 Sep 2002 14:47:53 -0700 From: William Lee Irwin III Subject: Re: [Lse-tech] Re: Examining the Performance and Cost of Revesema ps on 2.5.26 Under Heavy DBWorkload Message-ID: <20020917214753.GA2179@holomorphy.com> References: <39B5C4829263D411AA93009027AE9EBB13299719@fmsmsx35.fm.intel.com> <129560000.1032298951@flay> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Description: brief message Content-Disposition: inline In-Reply-To: <129560000.1032298951@flay> Sender: owner-linux-mm@kvack.org Return-Path: To: "Martin J. Bligh" Cc: "Luck, Tony" , Andrew Morton , Peter Wong , linux-mm@kvack.org, lse-tech@lists.sourceforge.net, riel@nl.linux.org, dmccr@us.ibm.com, gh@us.ibm.com, Bill Hartner , Troy C Wilson List-ID: At some point in the past, Tony Luck wrote: >> Can't you use LD_PRELOAD tricks to sneak a different version shmget/shmat >> to your DB2 binary so that you can intercept the important calls and >> divert them to use huge tlb pages? On Tue, Sep 17, 2002 at 02:42:31PM -0700, Martin J. Bligh wrote: > If we had a shmget/shmat call that supported large pages, that would > probably make it easier ? ;-) That's the whole issue - large pages aren't > supported with standard syscalls, so every app is required to rewrite their > memory handling, which isn't going to happen. > M. The pressure on this never lets up. It's being done, though I can't say I'm entirely happy with how quickly/slowly I'm getting it done myself. Bill -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/