From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 18 May 2000 10:41:05 -0300 (BRST) From: Rik van Riel Subject: Re: PATCH: Possible solution to VM problems (take 2) In-Reply-To: <20000518125921.A1570@gondor.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Jan Niehusmann Cc: Craig Kulesa , linux-mm@kvack.org List-ID: On Thu, 18 May 2000, Jan Niehusmann wrote: > On Thu, May 18, 2000 at 03:17:25AM -0700, Craig Kulesa wrote: > > A stubborn problem that remains is the behavior when lots of > > dirty pages pile up quickly. Doing a giant 'dd' from /dev/zero to a > > file on disk still causes gaps of unresponsiveness. Here's a short vmstat > > session on a 128 MB PIII system performing a 'dd if=/dev/zero of=dummy.dat > > bs=1024k count=256': > > While 'dd if=/dev/zero of=file' can, of course, generate dirty pages at > an insane rate, I see the same unresponsiveness when doing cp -a from > one filesystem to another. (and even from a slow harddisk to a faster one). I think I have this mostly figured out. I'll work on making some small improvements over Quintela's patch that will make the system behave decently in this situation too. regards, Rik -- The Internet is not a network of computers. It is a network of people. That is its real strength. Wanna talk about the kernel? irc.openprojects.net / #kernelnewbies http://www.conectiva.com/ http://www.surriel.com/ -- 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.eu.org/Linux-MM/