From: "Michal Nazarewicz" <mina86@mina86.com>
To: "Marek Szyprowski" <m.szyprowski@samsung.com>,
"Hillf Danton" <dhillf@gmail.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,
"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>
Subject: Re: [PATCH 12/15] drivers: add Contiguous Memory Allocator
Date: Sun, 05 Feb 2012 15:33:08 +0100 [thread overview]
Message-ID: <op.v87mpive3l0zgt@mpn-glaptop> (raw)
In-Reply-To: <CAJd=RBBPOwftZJUfe3xc6y24=T8un5hPk0wEOT_5v6WMCbDSag@mail.gmail.com>
On Sun, 05 Feb 2012 05:25:40 +0100, Hillf Danton <dhillf@gmail.com> wrote:
> Without boot mem reservation, what is the successful rate of CMA to
> serve requests of 1MiB, 2MiB, 4MiB and 8MiB chunks?
CMA will work as long as you manage to get some pageblocks marked as
MIGRATE_CMA and move all non-movable pages away. You might try and get it
done after system has booted but we have not tried nor tested it.
Reservation at boot time lets us make sure that the portion of memory we
are grabbing has no unmovable pages.
You might still and use alloc_contig_pages() on its own (even without
MIGRATE_CMA) but that would require additional code which would look for
a region of memory that could be used (ie. that does not have unmovable
pages in it). That in fact was what Kamezawa's code was doing.
--
Best regards, _ _
.o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o
..o | Computer Science, Michał “mina86” Nazarewicz (o o)
ooo +----<email/xmpp: mpn@google.com>--------------ooO--(_)--Ooo--
next prev parent reply other threads:[~2012-02-05 14:33 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-03 12:18 [PATCHv20 00/15] Contiguous Memory Allocator Marek Szyprowski
2012-02-03 12:18 ` [PATCH 01/15] mm: page_alloc: remove trailing whitespace Marek Szyprowski
2012-02-03 12:18 ` [PATCH 02/15] mm: compaction: introduce isolate_migratepages_range() Marek Szyprowski
2012-02-03 12:18 ` [PATCH 03/15] mm: compaction: introduce map_pages() Marek Szyprowski
2012-02-03 13:30 ` Mel Gorman
2012-02-03 12:18 ` [PATCH 04/15] mm: compaction: introduce isolate_freepages_range() Marek Szyprowski
2012-02-03 12:18 ` [PATCH 05/15] mm: compaction: export some of the functions Marek Szyprowski
2012-02-05 7:40 ` Hillf Danton
2012-02-05 14:34 ` Michal Nazarewicz
2012-02-06 12:46 ` Hillf Danton
2012-02-03 12:18 ` [PATCH 06/15] mm: page_alloc: introduce alloc_contig_range() Marek Szyprowski
2012-02-03 12:18 ` [PATCH 07/15] mm: page_alloc: change fallbacks array handling Marek Szyprowski
2012-02-03 12:18 ` [PATCH 08/15] mm: mmzone: MIGRATE_CMA migration type added Marek Szyprowski
2012-02-03 13:53 ` Mel Gorman
2012-02-03 14:19 ` Hillf Danton
2012-02-03 15:50 ` Michal Nazarewicz
2012-02-04 9:09 ` Hillf Danton
2012-02-05 14:37 ` Michal Nazarewicz
2012-02-03 12:18 ` [PATCH 09/15] mm: page_isolation: MIGRATE_CMA isolation functions added Marek Szyprowski
2012-02-03 12:18 ` [PATCH 10/15] mm: extract reclaim code from __alloc_pages_direct_reclaim() Marek Szyprowski
2012-02-03 12:18 ` [PATCH 11/15] mm: trigger page reclaim in alloc_contig_range() to stabilize watermarks Marek Szyprowski
2012-02-03 14:04 ` Mel Gorman
2012-02-08 2:04 ` [Linaro-mm-sig] " sandeep patil
2012-02-08 9:21 ` Michal Nazarewicz
2012-02-08 19:26 ` sandeep patil
2012-02-08 15:14 ` Marek Szyprowski
2012-02-10 11:19 ` Mel Gorman
2012-02-10 15:36 ` Marek Szyprowski
2012-02-03 12:18 ` [PATCH 12/15] drivers: add Contiguous Memory Allocator Marek Szyprowski
2012-02-05 4:25 ` Hillf Danton
2012-02-05 14:33 ` Michal Nazarewicz [this message]
2012-02-06 12:51 ` Hillf Danton
2012-02-03 12:18 ` [PATCH 13/15] X86: integrate CMA with DMA-mapping subsystem Marek Szyprowski
2012-02-03 12:18 ` [PATCH 14/15] ARM: " Marek Szyprowski
2012-02-03 12:18 ` [PATCH 15/15] ARM: Samsung: use CMA for 2 memory banks for s5p-mfc device Marek Szyprowski
2012-02-03 14:09 ` [PATCHv20 00/15] Contiguous Memory Allocator Mel Gorman
2012-02-07 9:06 ` Contiguous Memory Allocator on HIGHMEM cp.zou
2012-02-07 9:48 ` Marek Szyprowski
-- strict thread matches above, loose matches on Subject: below --
2012-01-26 9:00 [PATCHv19 00/15] Contiguous Memory Allocator Marek Szyprowski
2012-01-26 9:00 ` [PATCH 12/15] drivers: add " Marek Szyprowski
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