From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 15 Aug 2001 15:30:02 -0700 (PDT) From: Linus Torvalds Subject: Re: 0-order allocation problem 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: Marcelo Tosatti Cc: Hugh Dickins , linux-mm@kvack.org List-ID: On Wed, 15 Aug 2001, Marcelo Tosatti wrote: > > __GFP_IO is not going to help us that much on anon intensive workloads > (eg swapoff). Remember we are _never_ going to block on buffer_head's of > on flight swap pages because we can't see them in page_launder(). (if a > page is locked, we simply skip it) Note that that is what we have the page_alloc (and buffer head) reserves for - and it doesn't take that much to get the ball rolling. Certainly not even close to our low-water-marks.. And once it snowballs it _does_ help that people call page_launder(). Linus -- 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/