From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx161.postini.com [74.125.245.161]) by kanga.kvack.org (Postfix) with SMTP id 071858D0001 for ; Fri, 11 May 2012 04:31:18 -0400 (EDT) Received: by bkcjm19 with SMTP id jm19so2827996bkc.14 for ; Fri, 11 May 2012 01:31:17 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: From: Sasha Levin Date: Fri, 11 May 2012 10:30:56 +0200 Message-ID: Subject: Re: [PATCH] mm: raise MemFree by reverting percpu_pagelist_fraction to 0 Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins Cc: Linus Torvalds , Andrew Morton , Minchan Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org On Fri, May 11, 2012 at 10:00 AM, Hugh Dickins wrote: > Commit 93278814d359 "mm: fix division by 0 in percpu_pagelist_fraction()" > mistakenly initialized percpu_pagelist_fraction to the sysctl's minimum 8, > which leaves 1/8th of memory on percpu lists (on each cpu??); but most of > us expect it to be left unset at 0 (and it's not then used as a divisor). I'm a bit confused about this, does it mean that once you set percpu_pagelist_fraction to a value above the minimum, you can no longer set it back to being 0? -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org