From: Arnd Bergmann <arnd@arndb.de>
To: Larry Bassel <lbassel@codeaurora.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
"'Zach Pfeffer'" <zach.pfeffer@linaro.org>,
"'Daniel Walker'" <dwalker@codeaurora.org>,
"'Daniel Stone'" <daniels@collabora.com>,
"'Jesse Barker'" <jesse.barker@linaro.org>,
"'Mel Gorman'" <mel@csn.ul.ie>,
"'KAMEZAWA Hiroyuki'" <kamezawa.hiroyu@jp.fujitsu.com>,
linux-kernel@vger.kernel.org,
"'Michal Nazarewicz'" <mina86@mina86.com>,
linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org,
"'Kyungmin Park'" <kyungmin.park@samsung.com>,
"'Ankita Garg'" <ankita@in.ibm.com>,
"'Andrew Morton'" <akpm@linux-foundation.org>,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: Re: [Linaro-mm-sig] [PATCH 08/10] mm: cma: Contiguous Memory Allocator added
Date: Fri, 17 Jun 2011 14:45:09 +0200 [thread overview]
Message-ID: <201106171445.09567.arnd@arndb.de> (raw)
In-Reply-To: <20110616170133.GC28032@labbmf-linux.qualcomm.com>
On Thursday 16 June 2011 19:01:33 Larry Bassel wrote:
> > Can you describe how the memory areas differ specifically?
> > Is there one that is always faster but very small, or are there
> > just specific circumstances under which some memory is faster than
> > another?
>
> One is always faster, but very small (generally 2-10% the size
> of "normal" memory).
>
Ok, that sounds like the "SRAM" regions that we are handling on some
ARM platforms using the various interfaces. It should probably
remain outside of the regular allocator, but we can try to generalize
the SRAM support further. There are many possible uses for it.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Larry Bassel <lbassel@codeaurora.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
'Zach Pfeffer' <zach.pfeffer@linaro.org>,
'Daniel Walker' <dwalker@codeaurora.org>,
'Daniel Stone' <daniels@collabora.com>,
'Jesse Barker' <jesse.barker@linaro.org>,
'Mel Gorman' <mel@csn.ul.ie>,
'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@jp.fujitsu.com>,
linux-kernel@vger.kernel.org,
'Michal Nazarewicz' <mina86@mina86.com>,
linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org,
'Kyungmin Park' <kyungmin.park@samsung.com>,
'Ankita Garg' <ankita@in.ibm.com>,
'Andrew Morton' <akpm@linux-foundation.org>,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: Re: [Linaro-mm-sig] [PATCH 08/10] mm: cma: Contiguous Memory Allocator added
Date: Fri, 17 Jun 2011 14:45:09 +0200 [thread overview]
Message-ID: <201106171445.09567.arnd@arndb.de> (raw)
In-Reply-To: <20110616170133.GC28032@labbmf-linux.qualcomm.com>
On Thursday 16 June 2011 19:01:33 Larry Bassel wrote:
> > Can you describe how the memory areas differ specifically?
> > Is there one that is always faster but very small, or are there
> > just specific circumstances under which some memory is faster than
> > another?
>
> One is always faster, but very small (generally 2-10% the size
> of "normal" memory).
>
Ok, that sounds like the "SRAM" regions that we are handling on some
ARM platforms using the various interfaces. It should probably
remain outside of the regular allocator, but we can try to generalize
the SRAM support further. There are many possible uses for it.
Arnd
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WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [Linaro-mm-sig] [PATCH 08/10] mm: cma: Contiguous Memory Allocator added
Date: Fri, 17 Jun 2011 14:45:09 +0200 [thread overview]
Message-ID: <201106171445.09567.arnd@arndb.de> (raw)
In-Reply-To: <20110616170133.GC28032@labbmf-linux.qualcomm.com>
On Thursday 16 June 2011 19:01:33 Larry Bassel wrote:
> > Can you describe how the memory areas differ specifically?
> > Is there one that is always faster but very small, or are there
> > just specific circumstances under which some memory is faster than
> > another?
>
> One is always faster, but very small (generally 2-10% the size
> of "normal" memory).
>
Ok, that sounds like the "SRAM" regions that we are handling on some
ARM platforms using the various interfaces. It should probably
remain outside of the regular allocator, but we can try to generalize
the SRAM support further. There are many possible uses for it.
Arnd
next prev parent reply other threads:[~2011-06-17 12:47 UTC|newest]
Thread overview: 178+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-10 9:54 [PATCHv10 0/10] Contiguous Memory Allocator Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 01/10] lib: bitmap: Added alignment offset for bitmap_find_next_zero_area() Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 02/10] lib: genalloc: Generic allocator improvements Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 11:24 ` Alan Cox
2011-06-10 11:24 ` Alan Cox
2011-06-10 11:24 ` Alan Cox
2011-06-10 12:22 ` Marek Szyprowski
2011-06-10 12:22 ` Marek Szyprowski
2011-06-10 12:22 ` Marek Szyprowski
2011-06-10 12:52 ` Alan Cox
2011-06-10 12:52 ` Alan Cox
2011-06-10 12:52 ` Alan Cox
2011-06-10 17:16 ` Michal Nazarewicz
2011-06-10 17:16 ` Michal Nazarewicz
2011-06-10 17:16 ` Michal Nazarewicz
2011-06-14 15:49 ` [Linaro-mm-sig] " Jordan Crouse
2011-06-14 15:49 ` Jordan Crouse
2011-06-14 15:49 ` Jordan Crouse
2011-06-10 9:54 ` [PATCH 03/10] mm: move some functions from memory_hotplug.c to page_isolation.c Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 04/10] mm: alloc_contig_freed_pages() added Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 05/10] mm: alloc_contig_range() added Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 06/10] mm: MIGRATE_CMA migration type added Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 07/10] mm: MIGRATE_CMA isolation functions added Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 08/10] mm: cma: Contiguous Memory Allocator added Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 16:21 ` Arnd Bergmann
2011-06-10 16:21 ` Arnd Bergmann
2011-06-10 16:21 ` Arnd Bergmann
2011-06-13 9:05 ` Marek Szyprowski
2011-06-13 9:05 ` Marek Szyprowski
2011-06-13 9:05 ` Marek Szyprowski
2011-06-14 13:49 ` Arnd Bergmann
2011-06-14 13:49 ` Arnd Bergmann
2011-06-14 13:49 ` Arnd Bergmann
2011-06-14 13:55 ` Michal Nazarewicz
2011-06-14 13:55 ` Michal Nazarewicz
2011-06-14 13:55 ` Michal Nazarewicz
2011-06-14 16:03 ` Arnd Bergmann
2011-06-14 16:03 ` Arnd Bergmann
2011-06-14 16:03 ` Arnd Bergmann
2011-06-14 16:58 ` Michal Nazarewicz
2011-06-14 16:58 ` Michal Nazarewicz
2011-06-14 16:58 ` Michal Nazarewicz
2011-06-14 18:30 ` Arnd Bergmann
2011-06-14 18:30 ` Arnd Bergmann
2011-06-14 18:30 ` Arnd Bergmann
2011-06-14 18:40 ` Michal Nazarewicz
2011-06-14 18:40 ` Michal Nazarewicz
2011-06-14 18:40 ` Michal Nazarewicz
2011-06-15 7:11 ` Marek Szyprowski
2011-06-15 7:11 ` Marek Szyprowski
2011-06-15 7:11 ` Marek Szyprowski
2011-06-15 7:37 ` Arnd Bergmann
2011-06-15 7:37 ` Arnd Bergmann
2011-06-15 7:37 ` Arnd Bergmann
2011-06-15 8:14 ` Marek Szyprowski
2011-06-15 8:14 ` Marek Szyprowski
2011-06-15 8:14 ` Marek Szyprowski
2011-06-16 0:48 ` [Linaro-mm-sig] " Philip Balister
2011-06-16 0:48 ` Philip Balister
2011-06-16 0:48 ` Philip Balister
2011-06-16 7:03 ` Arnd Bergmann
2011-06-16 7:03 ` Arnd Bergmann
2011-06-16 7:03 ` Arnd Bergmann
2011-06-16 7:03 ` Arnd Bergmann
2011-06-22 7:03 ` Hans Verkuil
2011-06-22 7:03 ` Hans Verkuil
2011-06-22 7:03 ` Hans Verkuil
2011-06-22 7:32 ` Michal Nazarewicz
2011-06-22 7:32 ` Michal Nazarewicz
2011-06-22 7:32 ` Michal Nazarewicz
2011-06-22 12:42 ` Arnd Bergmann
2011-06-22 12:42 ` Arnd Bergmann
2011-06-22 12:42 ` Arnd Bergmann
2011-06-22 13:15 ` Marek Szyprowski
2011-06-22 13:15 ` Marek Szyprowski
2011-06-22 13:15 ` Marek Szyprowski
2011-06-22 13:39 ` Arnd Bergmann
2011-06-22 13:39 ` Arnd Bergmann
2011-06-22 13:39 ` Arnd Bergmann
2011-06-22 13:39 ` Arnd Bergmann
2011-06-22 16:04 ` Michal Nazarewicz
2011-06-22 16:04 ` Michal Nazarewicz
2011-06-22 16:04 ` Michal Nazarewicz
2011-06-22 15:54 ` Michal Nazarewicz
2011-06-22 15:54 ` Michal Nazarewicz
2011-06-22 15:54 ` Michal Nazarewicz
2011-06-15 11:53 ` Daniel Vetter
2011-06-15 11:53 ` Daniel Vetter
2011-06-15 11:53 ` Daniel Vetter
2011-06-15 13:12 ` Thomas Hellstrom
2011-06-15 13:12 ` Thomas Hellstrom
2011-06-15 13:12 ` Thomas Hellstrom
2011-06-17 16:08 ` Arnd Bergmann
2011-06-17 16:08 ` Arnd Bergmann
2011-06-17 16:08 ` Arnd Bergmann
2011-06-14 17:01 ` Daniel Stone
2011-06-14 17:01 ` Daniel Stone
2011-06-14 17:01 ` Daniel Stone
2011-06-14 18:58 ` Zach Pfeffer
2011-06-14 18:58 ` Zach Pfeffer
2011-06-14 18:58 ` Zach Pfeffer
2011-06-14 20:42 ` Arnd Bergmann
2011-06-14 20:42 ` Arnd Bergmann
2011-06-14 20:42 ` Arnd Bergmann
2011-06-14 21:01 ` Jordan Crouse
2011-06-14 21:01 ` Jordan Crouse
2011-06-14 21:01 ` Jordan Crouse
2011-06-15 11:27 ` Arnd Bergmann
2011-06-15 11:27 ` Arnd Bergmann
2011-06-15 11:27 ` Arnd Bergmann
2011-06-15 11:27 ` Arnd Bergmann
2011-06-15 6:29 ` Subash Patel
2011-06-15 8:36 ` Marek Szyprowski
2011-06-15 8:36 ` Marek Szyprowski
2011-06-15 8:36 ` Marek Szyprowski
2011-06-15 21:39 ` Larry Bassel
2011-06-15 21:39 ` Larry Bassel
2011-06-15 21:39 ` Larry Bassel
2011-06-15 22:06 ` Arnd Bergmann
2011-06-15 22:06 ` Arnd Bergmann
2011-06-15 22:06 ` Arnd Bergmann
2011-06-16 17:01 ` Larry Bassel
2011-06-16 17:01 ` Larry Bassel
2011-06-16 17:01 ` Larry Bassel
2011-06-17 12:45 ` Arnd Bergmann [this message]
2011-06-17 12:45 ` Arnd Bergmann
2011-06-17 12:45 ` Arnd Bergmann
2011-07-04 5:25 ` Ankita Garg
2011-07-04 5:25 ` Ankita Garg
2011-07-04 5:25 ` Ankita Garg
2011-07-04 14:45 ` Arnd Bergmann
2011-07-04 14:45 ` Arnd Bergmann
2011-07-04 14:45 ` Arnd Bergmann
2011-06-16 3:20 ` Zach Pfeffer
2011-06-16 3:20 ` Zach Pfeffer
2011-06-16 3:20 ` Zach Pfeffer
2011-06-15 9:26 ` Michal Nazarewicz
2011-06-15 9:26 ` Michal Nazarewicz
2011-06-15 9:26 ` Michal Nazarewicz
2011-06-15 11:20 ` Arnd Bergmann
2011-06-15 11:20 ` Arnd Bergmann
2011-06-15 11:20 ` Arnd Bergmann
2011-06-15 11:30 ` Michal Nazarewicz
2011-06-15 11:30 ` Michal Nazarewicz
2011-06-15 11:30 ` Michal Nazarewicz
2011-06-15 6:01 ` Subash Patel
2011-06-15 6:01 ` Subash Patel
2011-06-15 6:01 ` Subash Patel
2011-06-15 8:02 ` Marek Szyprowski
2011-06-15 8:02 ` Marek Szyprowski
2011-06-15 8:02 ` Marek Szyprowski
2011-06-15 11:14 ` Arnd Bergmann
2011-06-15 11:14 ` Arnd Bergmann
2011-06-15 11:14 ` Arnd Bergmann
2011-06-10 9:54 ` [PATCH 09/10] ARM: integrate CMA with dma-mapping subsystem Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` [PATCH 10/10] ARM: S5PV210: add CMA support for FIMC devices on Aquila board Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
2011-06-10 9:54 ` Marek Szyprowski
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