From: Marek Szyprowski <m.szyprowski@samsung.com>
To: 'Arnd Bergmann' <arnd@arndb.de>
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' <mina86@mina86.com>,
'Kyungmin Park' <kyungmin.park@samsung.com>,
'Russell King' <linux@arm.linux.org.uk>,
'Andrew Morton' <akpm@linux-foundation.org>,
'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@jp.fujitsu.com>,
'Daniel Walker' <dwalker@codeaurora.org>,
'Mel Gorman' <mel@csn.ul.ie>,
'Jesse Barker' <jesse.barker@linaro.org>,
'Jonathan Corbet' <corbet@lwn.net>,
'Shariq Hasnain' <shariq.hasnain@linaro.org>,
'Chunsang Jeong' <chunsang.jeong@linaro.org>,
'Dave Hansen' <dave@linux.vnet.ibm.com>,
'Benjamin Gaignard' <benjamin.gaignard@linaro.org>
Subject: RE: [PATCHv19 00/15] Contiguous Memory Allocator
Date: Thu, 26 Jan 2012 16:48:29 +0100 [thread overview]
Message-ID: <009f01ccdc41$f30a5f70$d91f1e50$%szyprowski@samsung.com> (raw)
In-Reply-To: <201201261531.40551.arnd@arndb.de>
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
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next prev parent reply other threads:[~2012-01-26 15:48 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-26 9:00 [PATCHv19 00/15] Contiguous Memory Allocator Marek Szyprowski
2012-01-26 9:00 ` [PATCH 01/15] mm: page_alloc: remove trailing whitespace Marek Szyprowski
2012-01-30 10:59 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 02/15] mm: page_alloc: update migrate type of pages on pcp when isolating Marek Szyprowski
2012-01-30 11:15 ` Mel Gorman
2012-01-30 15:41 ` Michal Nazarewicz
2012-01-30 16:14 ` Mel Gorman
2012-01-31 16:23 ` Marek Szyprowski
2012-02-02 12:47 ` Mel Gorman
2012-02-02 19:53 ` Michal Nazarewicz
2012-02-03 9:31 ` Marek Szyprowski
2012-02-03 11:27 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 03/15] mm: compaction: introduce isolate_migratepages_range() Marek Szyprowski
2012-01-30 11:24 ` Mel Gorman
2012-01-30 12:42 ` Michal Nazarewicz
2012-01-30 13:25 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 04/15] mm: compaction: introduce isolate_freepages_range() Marek Szyprowski
2012-01-30 11:48 ` Mel Gorman
2012-01-30 11:55 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 05/15] mm: compaction: export some of the functions Marek Szyprowski
2012-01-30 11:57 ` Mel Gorman
2012-01-30 12:33 ` Michal Nazarewicz
2012-01-26 9:00 ` [PATCH 06/15] mm: page_alloc: introduce alloc_contig_range() Marek Szyprowski
2012-01-30 12:11 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 07/15] mm: page_alloc: change fallbacks array handling Marek Szyprowski
2012-01-30 12:12 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 08/15] mm: mmzone: MIGRATE_CMA migration type added Marek Szyprowski
2012-01-30 12:35 ` Mel Gorman
2012-01-30 13:06 ` Michal Nazarewicz
2012-01-30 14:52 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 09/15] mm: page_isolation: MIGRATE_CMA isolation functions added Marek Szyprowski
2012-01-26 9:00 ` [PATCH 10/15] mm: extract reclaim code from __alloc_pages_direct_reclaim() Marek Szyprowski
2012-01-30 12:42 ` Mel Gorman
2012-01-26 9:00 ` [PATCH 11/15] mm: trigger page reclaim in alloc_contig_range() to stabilize watermarks Marek Szyprowski
2012-01-30 13:05 ` Mel Gorman
2012-01-31 17:15 ` Marek Szyprowski
2012-01-26 9:00 ` [PATCH 12/15] drivers: add Contiguous Memory Allocator Marek Szyprowski
2012-01-27 9:44 ` [Linaro-mm-sig] " Ohad Ben-Cohen
2012-01-27 10:53 ` Marek Szyprowski
2012-01-27 14:27 ` Clark, Rob
2012-01-27 14:51 ` Marek Szyprowski
2012-01-27 14:59 ` Ohad Ben-Cohen
2012-01-27 15:17 ` Marek Szyprowski
2012-01-28 18:57 ` Ohad Ben-Cohen
2012-01-30 7:43 ` Marek Szyprowski
2012-01-30 9:16 ` Ohad Ben-Cohen
2012-01-27 14:56 ` Ohad Ben-Cohen
2012-01-26 9:00 ` [PATCH 13/15] X86: integrate CMA with DMA-mapping subsystem Marek Szyprowski
2012-01-26 9:00 ` [PATCH 14/15] ARM: " Marek Szyprowski
2012-01-26 9:00 ` [PATCH 15/15] ARM: Samsung: use CMA for 2 memory banks for s5p-mfc device Marek Szyprowski
2012-01-26 15:31 ` [PATCHv19 00/15] Contiguous Memory Allocator Arnd Bergmann
2012-01-26 15:38 ` Michal Nazarewicz
2012-01-26 15:48 ` Marek Szyprowski [this message]
2012-01-28 0:26 ` Andrew Morton
2012-01-29 18:09 ` Rob Clark
2012-01-29 20:32 ` Anca Emanuel
2012-01-29 20:51 ` Arnd Bergmann
2012-01-30 13:25 ` Mel Gorman
2012-01-30 15:43 ` Michal Nazarewicz
2012-01-31 17:17 ` Benjamin Gaignard
2012-02-01 8:47 ` Marek Szyprowski
2012-02-10 18:10 ` Marek Szyprowski
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