From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 25 Sep 2000 16:42:49 +0100 From: "Stephen C. Tweedie" Subject: Re: the new VMt Message-ID: <20000925164249.G2615@redhat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ; from alan@lxorguk.ukuu.org.uk on Mon, Sep 25, 2000 at 04:16:56PM +0100 Sender: owner-linux-mm@kvack.org Return-Path: To: Alan Cox Cc: mingo@elte.hu, Andrea Arcangeli , Marcelo Tosatti , Linus Torvalds , Rik van Riel , Roger Larsson , MM mailing list , linux-kernel@vger.kernel.org List-ID: Hi, On Mon, Sep 25, 2000 at 04:16:56PM +0100, Alan Cox wrote: > > Unless Im missing something here think about this case > > 2 active processes, no swap > > #1 #2 > kmalloc 32K kmalloc 16K > OK OK > kmalloc 16K kmalloc 32K > block block > ... and we get two wakeup_kswapd()s. kswapd has PF_MEMALLOC and so is able to eat memory which processes #1 and #2 are not allowed to touch. Progress is made, clean pages are discarded and dirty ones queued for write, memory becomes free again and the world is a better place. Or so goes the theory, at least. --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/