From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with SMTP id 813C06B0047 for ; Thu, 30 Apr 2009 00:54:57 -0400 (EDT) Date: Wed, 29 Apr 2009 21:55:26 -0700 From: Elladan Subject: Re: Swappiness vs. mmap() and interactive response Message-ID: <20090430045525.GC6110@eskimo.com> References: <20090428090916.GC17038@localhost> <20090428120818.GH22104@mit.edu> <20090429130430.4B11.A69D9226@jp.fujitsu.com> <20090428233455.614dcf3a.akpm@linux-foundation.org> <20090430041439.GA6110@eskimo.com> <20090429214332.a2b5b469.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090429214332.a2b5b469.akpm@linux-foundation.org> Sender: owner-linux-mm@kvack.org To: Andrew Morton Cc: Elladan , KOSAKI Motohiro , Theodore Tso , Wu Fengguang , Peter Zijlstra , linux-kernel@vger.kernel.org, linux-mm , Rik van Riel List-ID: On Wed, Apr 29, 2009 at 09:43:32PM -0700, Andrew Morton wrote: > On Wed, 29 Apr 2009 21:14:39 -0700 Elladan wrote: > > > > Elladan, have you checked to see whether the Mapped: number in > > > /proc/meminfo is decreasing? > > > > Yes, Mapped decreases while a large file copy is ongoing. It increases again > > if I use the GUI. > > OK. If that's still happening to an appreciable extent after you've > increased /proc/sys/vm/swappiness then I'd wager that we have a > bug/regression in that area. > > Local variable `scan' in shrink_zone() is vulnerable to multiplicative > overflows on large zones, but I doubt if you have enough memory to > trigger that bug. No, I only have 4GB. This appears to happen with swappiness set to 0 or 60. -Elladan -- 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