From: "Michal Nazarewicz" <mina86@mina86.com>
To: sandeep patil <psandeep.s@gmail.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
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 <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>, Dave Hansen <dave@linux.vnet.ibm.com>,
Jesse Barker <jesse.barker@linaro.org>,
Kyungmin Park <kyungmin.park@samsung.com>,
Ankita Garg <ankita@in.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [Linaro-mm-sig] [PATCHv17 0/11] Contiguous Memory Allocator
Date: Sat, 19 Nov 2011 19:09:23 +0100 [thread overview]
Message-ID: <op.v47gpxi03l0zgt@mpn-glaptop> (raw)
In-Reply-To: <CA+K6fF6iDivqmN9kfY34tWNg+g_rYBBmyS_Mxb6gvLuSgA2JyQ@mail.gmail.com>
>> On Fri, 18 Nov 2011 22:20:48 +0100, sandeep patil wrote:
>>> 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?
> 2011/11/18 Michal Nazarewicz <mina86@mina86.com>:
>> No. Current CMA implementation will stick to the same range of pages also
>> on consequent allocations of the same size.
On Sat, 19 Nov 2011 00:30:49 +0100, sandeep patil <psandeep.s@gmail.com> wrote:
> Doesn't that mean the drivers that fail to allocate from contiguous DMA region
> will fail, if the migration fails?
Yes.
I have some ideas how that could be mitigated. The easiest would be to try
another region to allocate from on failure. More complicated could be to try
and wait for the I/O transfer to finish. I'll try to work on it during
upcoming week.
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Best regards, _ _
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..o | Computer Science, Michał “mina86” Nazarewicz (o o)
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next prev parent reply other threads:[~2011-11-19 18:09 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 16:43 Marek Szyprowski
2011-11-18 16:43 ` [PATCH 01/11] mm: page_alloc: handle MIGRATE_ISOLATE in free_pcppages_bulk() Marek Szyprowski
2011-12-12 13:42 ` Mel Gorman
2011-12-12 14:23 ` Michal Nazarewicz
2011-12-12 14:42 ` Mel Gorman
2011-11-18 16:43 ` [PATCH 02/11] mm: compaction: introduce isolate_{free,migrate}pages_range() Marek Szyprowski
2011-12-12 14:07 ` Mel Gorman
2011-12-12 15:22 ` Michal Nazarewicz
2011-12-12 16:30 ` Mel Gorman
2011-12-12 16:46 ` Michal Nazarewicz
2011-12-12 17:20 ` Mel Gorman
2011-11-18 16:43 ` [PATCH 03/11] mm: mmzone: introduce zone_pfn_same_memmap() Marek Szyprowski
2011-12-12 14:19 ` Mel Gorman
2011-12-12 14:35 ` Michal Nazarewicz
2011-12-12 14:40 ` Mel Gorman
2011-12-12 14:51 ` Michal Nazarewicz
2011-12-12 15:51 ` Mel Gorman
2011-11-18 16:43 ` [PATCH 04/11] mm: compaction: export some of the functions Marek Szyprowski
2011-12-12 14:29 ` Mel Gorman
2011-12-12 14:41 ` Michal Nazarewicz
2011-12-12 15:40 ` Mel Gorman
2011-12-12 15:46 ` Michal Nazarewicz
2011-12-12 16:22 ` Arnd Bergmann
2011-11-18 16:43 ` [PATCH 05/11] mm: page_alloc: introduce alloc_contig_range() Marek Szyprowski
2011-11-18 16:43 ` [PATCH 06/11] mm: mmzone: MIGRATE_CMA migration type added Marek Szyprowski
2011-11-18 16:43 ` [PATCH 07/11] mm: page_isolation: MIGRATE_CMA isolation functions added Marek Szyprowski
2011-11-18 16:43 ` [PATCH 08/11] drivers: add Contiguous Memory Allocator Marek Szyprowski
2011-11-18 16:43 ` [PATCH 09/11] X86: integrate CMA with DMA-mapping subsystem Marek Szyprowski
2011-11-18 16:43 ` [PATCH 10/11] ARM: " Marek Szyprowski
2011-11-18 16:43 ` [PATCH 11/11] ARM: Samsung: use CMA for 2 memory banks for s5p-mfc device Marek Szyprowski
2011-11-18 21:20 ` [Linaro-mm-sig] [PATCHv17 0/11] Contiguous Memory Allocator sandeep patil
2011-11-18 21:26 ` Michal Nazarewicz
2011-11-18 23:30 ` sandeep patil
2011-11-19 18:09 ` Michal Nazarewicz [this message]
2011-11-25 16:43 ` [PATCH] mm: cma: hack/workaround for some allocation issues Marek Szyprowski
2011-11-25 21:08 ` Michal Nazarewicz
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