From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 14 Jul 2004 21:39:39 +0100 (BST) From: Hugh Dickins Subject: Re: [PATCH] /dev/zero page fault scaling In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-linux-mm@kvack.org Return-Path: To: Brent Casavant Cc: linux-mm@kvack.org List-ID: On Wed, 14 Jul 2004, Brent Casavant wrote: > > In a test program to measure the page fault performance, at 256P we > see a 150x improvement in the number of page faults per cpu per > wall-clock second (and other similar measures). Page fault performance > drops by about 50% at 512P compared to 256P, however this is likely > a seperate problem (investigation has not started), but is still > 138x better than before these changes. Wow. Good work. > I'm not sure if this list is the appropriate place to submit these > changes. If not, please direct me to the correct lists/people to > submit this to. The patch is against 2.6.(something recent, maybe 7). This list'll do fine. I'm the (unlisted) tmpfs maintainer, I'll give your patch a go tomorrow, and try to convert it to NULL sbinfo as I mentioned. I'll send you back the result, but won't send it on to Andrew thence Linus for a couple of weeks, until after the Ottawa Linux Symposium. Thanks a lot! Hugh -- 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/ . Don't email: aart@kvack.org