From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx109.postini.com [74.125.245.109]) by kanga.kvack.org (Postfix) with SMTP id 4F80D6B0036 for ; Tue, 9 Apr 2013 10:28:08 -0400 (EDT) Date: Tue, 9 Apr 2013 14:28:06 +0000 From: Christoph Lameter Subject: Re: [PATCH 2/3] mm, slub: count freed pages via rcu as this task's reclaimed_slab In-Reply-To: <1365470478-645-2-git-send-email-iamjoonsoo.kim@lge.com> Message-ID: <0000013def3255c0-87577820-0ad9-46ac-8498-0589db4e7180-000000@email.amazonses.com> References: <1365470478-645-1-git-send-email-iamjoonsoo.kim@lge.com> <1365470478-645-2-git-send-email-iamjoonsoo.kim@lge.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Joonsoo Kim Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Mel Gorman , Hugh Dickins , Rik van Riel , Minchan Kim , Pekka Enberg , Matt Mackall On Tue, 9 Apr 2013, Joonsoo Kim wrote: > Currently, freed pages via rcu is not counted for reclaimed_slab, because > it is freed in rcu context, not current task context. But, this free is > initiated by this task, so counting this into this task's reclaimed_slab > is meaningful to decide whether we continue reclaim, or not. > So change code to count these pages for this task's reclaimed_slab. slab->reclaim_state guides the reclaim actions in vmscan.c. With this patch slab->reclaim_state could get quite a high value without new pages being available for allocation. slab->reclaim_state will only be updated when the RCU period ends. -- 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