From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 4 Jun 2001 22:04:22 -0300 (BRT) From: Marcelo Tosatti Subject: Comment on patch to remove nr_async_pages limit Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Zlatko Calusic Cc: lkml , linux-mm@kvack.org List-ID: Zlatko, I've read your patch to remove nr_async_pages limit while reading an archive on the web. (I have to figure out why lkml is not being delivered correctly to me...) Quoting your message: "That artificial limit hurts both swap out and swap in path as it introduces synchronization points (and/or weakens swapin readahead), which I think are not necessary." If we are under low memory, we cannot simply writeout a whole bunch of swap data. Remember the writeout operations will potentially allocate buffer_head's for the swapcache pages before doing real IO, which takes _more memory_: OOM deadlock. -- 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/