From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Tomasz Fujak <t.fujak@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
'Daniel Walker' <dwalker@codeaurora.org>,
'Kyungmin Park' <kmpark@infradead.org>,
'Mel Gorman' <mel@csn.ul.ie>,
'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@jp.fujitsu.com>,
Michal Nazarewicz <mina86@mina86.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-arm-kernel@lists.infradead.org,
'Andrew Morton' <akpm@linux-foundation.org>,
linux-media@vger.kernel.org,
'Johan MOSSBERG' <johan.xx.mossberg@stericsson.com>,
'Ankita Garg' <ankita@in.ibm.com>
Subject: Re: [PATCHv8 00/12] Contiguous Memory Allocator
Date: Thu, 23 Dec 2010 13:48:38 +0000 [thread overview]
Message-ID: <20101223134838.GK3636@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <4D135004.3070904@samsung.com>
On Thu, Dec 23, 2010 at 02:35:00PM +0100, Tomasz Fujak wrote:
> Dear Mr. King,
>
> AFAIK the CMA is the fourth attempt since 2008 taken to solve the
> multimedia memory allocation issue on some embedded devices. Most
> notably on ARM, that happens to be present in the SoCs we care about
> along the IOMMU-incapable multimedia IPs.
>
> I understand that you have your guidelines taken from the ARM
> specification, but this approach is not helping us.
I'm sorry you feel like that, but I'm living in reality. If we didn't
have these architecture restrictions then we wouldn't have this problem
in the first place.
What I'm trying to do here is to ensure that we remain _legal_ to the
architecture specification - which for this issue means that we avoid
corrupting people's data.
Maybe you like having a system which randomly corrupts people's data?
I most certainly don't. But that's the way CMA is heading at the moment
on ARM.
It is not up to me to solve these problems - that's for the proposer of
the new API to do so. So, please, don't try to lump this problem on
my shoulders. It's not my problem to sort out.
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next prev parent reply other threads:[~2010-12-23 13:49 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
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 [this message]
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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