From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 3734F6B002D for ; Fri, 18 Nov 2011 16:26:55 -0500 (EST) Received: by bke17 with SMTP id 17so5240597bke.14 for ; Fri, 18 Nov 2011 13:26:51 -0800 (PST) Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes Subject: Re: [Linaro-mm-sig] [PATCHv17 0/11] Contiguous Memory Allocator References: <1321634598-16859-1-git-send-email-m.szyprowski@samsung.com> Date: Fri, 18 Nov 2011 22:26:49 +0100 MIME-Version: 1.0 Content-Transfer-Encoding: Quoted-Printable From: "Michal Nazarewicz" Message-ID: In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Marek Szyprowski , sandeep patil Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-mm@kvack.org, linaro-mm-sig@lists.linaro.org, Daniel Walker , Russell King , Arnd Bergmann , Jonathan Corbet , Mel Gorman , Dave Hansen , Jesse Barker , Kyungmin Park , Ankita Garg , Andrew Morton , KAMEZAWA Hiroyuki On Fri, 18 Nov 2011 22:20:48 +0100, sandeep patil = wrote: > I am running a simple test to allocate contiguous regions and write a = log on > in a file on sdcard simultaneously. I can reproduce this migration fai= lure 100% > times with it. > when I tracked the pages that failed to migrate, I found them on the > buffer head lru > list with a reference held on the buffer_head in the page, which > causes drop_buffers() > to fail. > > So, i guess my question is, until all the migration failures are > tracked down and fixed, > is there a plan to retry the contiguous allocation from a new range in= > the CMA region? No. Current CMA implementation will stick to the same range of pages al= so on consequent allocations of the same size. -- = Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=3D./ `o ..o | Computer Science, Micha=C5=82 =E2=80=9Cmina86=E2=80=9D Nazarewicz= (o o) ooo +------------------ooO--(_)--Ooo-- -- 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