From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx167.postini.com [74.125.245.167]) by kanga.kvack.org (Postfix) with SMTP id 4ADBE6B005C for ; Thu, 26 Jan 2012 10:48:35 -0500 (EST) Received: from euspt2 (mailout2.w1.samsung.com [210.118.77.12]) by mailout2.w1.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTP id <0LYE0010IX8XNO@mailout2.w1.samsung.com> for linux-mm@kvack.org; Thu, 26 Jan 2012 15:48:33 +0000 (GMT) Received: from linux.samsung.com ([106.116.38.10]) by spt2.w1.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0LYE00BLRX8WHM@spt2.w1.samsung.com> for linux-mm@kvack.org; Thu, 26 Jan 2012 15:48:33 +0000 (GMT) Date: Thu, 26 Jan 2012 16:48:29 +0100 From: Marek Szyprowski Subject: RE: [PATCHv19 00/15] Contiguous Memory Allocator In-reply-to: <201201261531.40551.arnd@arndb.de> Message-id: <009f01ccdc41$f30a5f70$d91f1e50$%szyprowski@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-language: pl Content-transfer-encoding: 7BIT References: <1327568457-27734-1-git-send-email-m.szyprowski@samsung.com> <201201261531.40551.arnd@arndb.de> Sender: owner-linux-mm@kvack.org List-ID: To: 'Arnd Bergmann' 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, 'Michal Nazarewicz' , 'Kyungmin Park' , 'Russell King' , 'Andrew Morton' , 'KAMEZAWA Hiroyuki' , 'Daniel Walker' , 'Mel Gorman' , 'Jesse Barker' , 'Jonathan Corbet' , 'Shariq Hasnain' , 'Chunsang Jeong' , 'Dave Hansen' , 'Benjamin Gaignard' Hello, On Thursday, January 26, 2012 4:32 PM Arnd Bergmann wrote: > On Thursday 26 January 2012, Marek Szyprowski wrote: > > Welcome everyone! > > > > Yes, that's true. This is yet another release of the Contiguous Memory > > Allocator patches. This version mainly includes code cleanups requested > > by Mel Gorman and a few minor bug fixes. > > Hi Marek, > > Thanks for keeping up this work! I really hope it works out for the > next merge window. > > > TODO (optional): > > - implement support for contiguous memory areas placed in HIGHMEM zone > > - resolve issue with movable pages with pending io operations > > Can you clarify these? I believe the contiguous memory areas in highmem > is something that should really be after the existing code is merged > into the upstream kernel and should better not be listed as TODO here. Ok, I will remove it from the TODO list. Core memory management is very little dependence on HIGHMEM, it is more about DMA-mapping framework to be aware that there might be no lowmem mappings for the allocated pages. This can be easily added once the initial version got merged. > I haven't followed the last two releases so closely. It seems that > in v17 the movable pages with pending i/o was still a major problem > but in v18 you added a solution. Is that right? What is still left > to be done here then? Since v18 the failed allocation is retried in a bit different place in the contiguous memory area what heavily increased overall reliability. This can be improved by making cma a bit more aware about pending io operations, but I want to leave this after the initial merge. I think that there are no major issues left to be resolved now. Best regards -- Marek Szyprowski Samsung Poland R&D Center -- 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