From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Kyungmin Park <kmpark@infradead.org>
Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>,
linux-arm-kernel@lists.infradead.org,
Daniel Walker <dwalker@codeaurora.org>,
Johan MOSSBERG <johan.xx.mossberg@stericsson.com>,
Mel Gorman <mel@csn.ul.ie>,
linux-kernel@vger.kernel.org,
Michal Nazarewicz <mina86@mina86.com>,
linux-mm@kvack.org, Ankita Garg <ankita@in.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-media@vger.kernel.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: [PATCHv8 00/12] Contiguous Memory Allocator
Date: Thu, 23 Dec 2010 10:06:42 +0000 [thread overview]
Message-ID: <20101223100642.GD3636@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <AANLkTim8_=0+-zM5z4j0gBaw3PF3zgpXQNetEn-CfUGb@mail.gmail.com>
On Thu, Dec 23, 2010 at 06:30:57PM +0900, Kyungmin Park wrote:
> Hi Andrew,
>
> any comments? what's the next step to merge it for 2.6.38 kernel. we
> want to use this feature at mainline kernel.
Has anyone addressed my issue with it that this is wide-open for
abuse by allocating large chunks of memory, and then remapping
them in some way with different attributes, thereby violating the
ARM architecture specification?
In other words, do we _actually_ have a use for this which doesn't
involve doing something like allocating 32MB of memory from it,
remapping it so that it's DMA coherent, and then performing DMA
on the resulting buffer?
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next prev parent reply other threads:[~2010-12-23 10:07 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-15 20:34 [PATCHv8 00/12] Contiguous Memory Allocator Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 01/12] mm: migrate.c: fix compilation error Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 02/12] lib: bitmap: Added alignment offset for bitmap_find_next_zero_area() Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 03/12] lib: genalloc: Generic allocator improvements Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 04/12] mm: move some functions from memory_hotplug.c to page_isolation.c Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 05/12] mm: alloc_contig_freed_pages() added Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 06/12] mm: alloc_contig_range() added Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 07/12] mm: cma: Contiguous Memory Allocator added Michal Nazarewicz
2011-02-02 12:43 ` Ankita Garg
2011-02-02 14:58 ` Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 08/12] mm: MIGRATE_CMA migration type added Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 09/12] mm: MIGRATE_CMA isolation functions added Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 10/12] mm: MIGRATE_CMA support added to CMA Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 11/12] mm: cma: Test device and application added Michal Nazarewicz
2010-12-15 20:34 ` [PATCHv8 12/12] ARM: cma: Added CMA to Aquila, Goni and c210 universal boards Michal Nazarewicz
2010-12-23 9:30 ` [PATCHv8 00/12] Contiguous Memory Allocator Kyungmin Park
2010-12-23 10:06 ` Russell King - ARM Linux [this message]
2010-12-23 10:58 ` Marek Szyprowski
2010-12-23 12:19 ` Russell King - ARM Linux
2010-12-23 13:09 ` Marek Szyprowski
2010-12-23 13:44 ` Russell King - ARM Linux
2011-01-12 18:49 ` Marek Szyprowski
2011-01-12 19:04 ` Nicolas Pitre
2011-01-13 7:01 ` Marek Szyprowski
2010-12-23 13:35 ` Tomasz Fujak
2010-12-23 13:48 ` Russell King - ARM Linux
2010-12-23 14:04 ` Tomasz Fujak
2010-12-23 14:16 ` Russell King - ARM Linux
2010-12-23 14:42 ` Felipe Contreras
2010-12-23 15:02 ` Michal Nazarewicz
2010-12-23 18:04 ` David Brown
2010-12-23 13:41 ` Michal Nazarewicz
2010-12-23 13:51 ` Russell King - ARM Linux
2010-12-23 14:08 ` Tomasz Fujak
2010-12-23 14:20 ` Russell King - ARM Linux
2010-12-23 15:35 ` Tomasz Fujak
2011-01-04 23:12 ` Jamie Lokier
2011-01-04 16:23 ` Johan MOSSBERG
2011-01-04 16:59 ` Michał Nazarewicz
2011-01-04 17:19 ` Russell King - ARM Linux
2011-01-04 17:31 ` Santosh Shilimkar
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