From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 1 Feb 2001 14:36:06 +0000 From: "Stephen C. Tweedie" Subject: Re: [PATCH] vma limited swapin readahead Message-ID: <20010201143606.P11607@redhat.com> References: <20010201112601.K11607@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ; from marcelo@conectiva.com.br on Thu, Feb 01, 2001 at 08:53:33AM -0200 Sender: owner-linux-mm@kvack.org Return-Path: To: Marcelo Tosatti Cc: "Stephen C. Tweedie" , David Gould , "Eric W. Biederman" , lkml , linux-mm@kvack.org List-ID: Hi, On Thu, Feb 01, 2001 at 08:53:33AM -0200, Marcelo Tosatti wrote: > > On Thu, 1 Feb 2001, Stephen C. Tweedie wrote: > > If we're under free memory shortage, "unlucky" readaheads will be harmful. I know, it's a balancing act. But given that even one successful readahead per read will halve the number of swapin seeks, the performance loss due to the extra scavenging has got to be bad to outweigh the benefit. Cheers, Stephen -- 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/