From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 3 Apr 2007 14:16:56 -0700 From: Andrew Morton Subject: Re: missing madvise functionality Message-Id: <20070403141656.1e25b878.akpm@linux-foundation.org> In-Reply-To: <4612C059.8070702@redhat.com> References: <46128051.9000609@redhat.com> <46128CC2.9090809@redhat.com> <20070403172841.GB23689@one.firstfloor.org> <20070403125903.3e8577f4.akpm@linux-foundation.org> <4612B645.7030902@redhat.com> <20070403135154.61e1b5f3.akpm@linux-foundation.org> <4612C059.8070702@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Rik van Riel Cc: Ulrich Drepper , Andi Kleen , Linux Kernel , Jakub Jelinek , linux-mm@kvack.org, Hugh Dickins List-ID: On Tue, 03 Apr 2007 17:00:09 -0400 Rik van Riel wrote: > Andrew Morton wrote: > > > Oh. I was assuming that we'd want to unmap these pages from pagetables and > > mark then super-easily-reclaimable. So a later touch would incur a minor > > fault. > > > > But you think that we should leave them mapped into pagetables so no such > > fault occurs. > > > Leaving the pages mapped into pagetables means that they are considerably > > less likely to be reclaimed. > > If we move the pages to a place where they are very likely to be > reclaimed quickly (end of the inactive list, or a separate > reclaim list) and clear the dirty and referenced lists, we can > both reclaim the page easily *and* avoid the page fault penalty. > ah, yes, you're right. That part should work nicely. -- 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/ . Don't email: email@kvack.org