From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-bw0-f46.google.com ([209.85.214.46]:52911 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753957Ab1KRV0x convert rfc822-to-8bit (ORCPT ); Fri, 18 Nov 2011 16:26:53 -0500 Content-Type: text/plain; charset=utf-8; format=flowed; delsp=yes 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" 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: 8BIT From: "Michal Nazarewicz" Message-ID: In-Reply-To: Sender: linux-media-owner@vger.kernel.org List-ID: 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 failure 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 also on consequent allocations of the same size. -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +------------------ooO--(_)--Ooo--