From: Marek Szyprowski <m.szyprowski@samsung.com>
To: 'Sandeep Patil' <psandeep.s@gmail.com>,
'Aaro Koskinen' <aaro.koskinen@nokia.com>
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,
'Ohad Ben-Cohen' <ohad@wizery.com>,
'Daniel Walker' <dwalker@codeaurora.org>,
'Russell King' <linux@arm.linux.org.uk>,
'Arnd Bergmann' <arnd@arndb.de>,
'Jonathan Corbet' <corbet@lwn.net>, 'Mel Gorman' <mel@csn.ul.ie>,
'Chunsang Jeong' <chunsang.jeong@linaro.org>,
'Michal Nazarewicz' <mina86@mina86.com>,
'Dave Hansen' <dave@linux.vnet.ibm.com>,
'Jesse Barker' <jesse.barker@linaro.org>,
'Kyungmin Park' <kyungmin.park@samsung.com>,
'Benjamin Gaignard' <benjamin.gaignard@linaro.org>,
'Andrew Morton' <akpm@linux-foundation.org>,
'Rob Clark' <rob.clark@linaro.org>,
'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@jp.fujitsu.com>
Subject: RE: [PATCHv24 00/16] Contiguous Memory Allocator
Date: Wed, 11 Apr 2012 08:48:24 +0200 [thread overview]
Message-ID: <00c201cd17af$17a3aa50$46eafef0$%szyprowski@samsung.com> (raw)
In-Reply-To: <CA+K6fF5TbhYX_XYXL33h5s8cnSogSna4Cq2-vM4MfX4igSyozg@mail.gmail.com>
Hi,
On Tuesday, April 10, 2012 7:20 PM Sandeep Patil wrote:
> >> This is (yet another) update of CMA patches.
> >
> >
> > How well CMA is supposed to work if you have mlocked processes? I've
> > been testing these patches, and noticed that by creating a small mlocked
> > process you start to get plenty of test_pages_isolated() failure warnings,
> > and bigger allocations will always fail.
>
> CMIIW, I think mlocked pages are never migrated. The reason is because
> __isolate_lru_pages() does not isolate Unevictable pages right now.
>
> Minchan added support to allow this but the patch was dropped.
>
> See the discussion at : https://lkml.org/lkml/2011/8/29/295
Right, we are aware of this limitation. We are working on solving it but we didn't
consider it a blocker for the core CMA patches. Such issues can be easily fixed with
the incremental patches.
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
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next prev parent reply other threads:[~2012-04-11 6:48 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-03 14:10 [PATCHv24 00/16] Contiguous Memory Allocator Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 01/16] mm: page_alloc: remove trailing whitespace Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 02/16] mm: compaction: introduce isolate_migratepages_range() Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 03/16] mm: compaction: introduce map_pages() Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 04/16] mm: compaction: introduce isolate_freepages_range() Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 05/16] mm: compaction: export some of the functions Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 06/16] mm: page_alloc: introduce alloc_contig_range() Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 07/16] mm: page_alloc: change fallbacks array handling Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 08/16] mm: mmzone: MIGRATE_CMA migration type added Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 09/16] mm: page_isolation: MIGRATE_CMA isolation functions added Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 10/16] mm: Serialize access to min_free_kbytes Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 11/16] mm: extract reclaim code from __alloc_pages_direct_reclaim() Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 12/16] mm: trigger page reclaim in alloc_contig_range() to stabilise watermarks Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 13/16] drivers: add Contiguous Memory Allocator Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 14/16] X86: integrate CMA with DMA-mapping subsystem Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 15/16] ARM: " Marek Szyprowski
2012-04-03 14:10 ` [PATCHv24 16/16] ARM: Samsung: use CMA for 2 memory banks for s5p-mfc device Marek Szyprowski
2012-04-10 13:41 ` [PATCHv24 00/16] Contiguous Memory Allocator Aaro Koskinen
2012-04-10 17:19 ` Sandeep Patil
2012-04-11 6:48 ` Marek Szyprowski [this message]
2012-04-12 12:39 ` cary.zou
2012-04-19 19:40 ` Andrew Morton
2012-04-20 12:22 ` Marek Szyprowski
2012-04-20 18:30 ` Kumar Gala
2012-04-20 18:31 ` Kumar Gala
2012-04-30 3:38 ` [Linaro-mm-sig] " Barry Song
2012-05-10 13:19 ` [PATCH] drivers: cma: don't fail if migration returns -EAGAIN Marek Szyprowski
2012-05-10 15:14 ` Minchan Kim
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