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Date: Wed, 29 Apr 2009 21:55:26 -0700 From: Elladan <elladan@...imo.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Elladan <elladan@...imo.com>, KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>, Theodore Tso <tytso@....edu>, Wu Fengguang <fengguang.wu@...el.com>, Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>, Rik van Riel <riel@...hat.com> Subject: Re: Swappiness vs. mmap() and interactive response On Wed, Apr 29, 2009 at 09:43:32PM -0700, Andrew Morton wrote: > On Wed, 29 Apr 2009 21:14:39 -0700 Elladan <elladan@...imo.com> 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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