From: Marek Szyprowski <m.szyprowski@samsung.com>
To: "'Alan Cox'" <alan@lxorguk.ukuu.org.uk>
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,
"'Michal Nazarewicz'" <mina86@mina86.com>,
"'Kyungmin Park'" <kyungmin.park@samsung.com>,
"'Andrew Morton'" <akpm@linux-foundation.org>,
"'KAMEZAWA Hiroyuki'" <kamezawa.hiroyu@jp.fujitsu.com>,
"'Ankita Garg'" <ankita@in.ibm.com>,
"'Daniel Walker'" <dwalker@codeaurora.org>,
"'Johan MOSSBERG'" <johan.xx.mossberg@stericsson.com>,
"'Mel Gorman'" <mel@csn.ul.ie>, "'Arnd Bergmann'" <arnd@arndb.de>,
"'Jesse Barker'" <jesse.barker@linaro.org>
Subject: RE: [PATCH 02/10] lib: genalloc: Generic allocator improvements
Date: Fri, 10 Jun 2011 14:22:05 +0200 [thread overview]
Message-ID: <000c01cc2769$02669b70$0733d250$%szyprowski@samsung.com> (raw)
In-Reply-To: <20110610122451.15af86d1@lxorguk.ukuu.org.uk>
Hello,
On Friday, June 10, 2011 1:25 PM Alan Cox wrote:
> I am curious about one thing
>
> Why do we need this allocator. Why not use allocate_resource and friends.
> The kernel generic resource handler already handles object alignment and
> subranges. It just seems to be a surplus allocator that could perhaps be
> mostly removed by using the kernel resource allocator we already have ?
genalloc was used mainly for historical reasons (in the earlier version we
were looking for direct replacement for first fit allocator).
I plan to replace it with lib/bitmap.c bitmap_* based allocator (similar like
it it is used by dma_declare_coherent_memory() and friends in
drivers/base/dma-coherent.c). We need something really simple for CMA area
management.
IMHO allocate_resource and friends a bit too heavy here, but good to know
that such allocator also exists.
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
WARNING: multiple messages have this Message-ID (diff)
From: Marek Szyprowski <m.szyprowski@samsung.com>
To: 'Alan Cox' <alan@lxorguk.ukuu.org.uk>
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,
'Michal Nazarewicz' <mina86@mina86.com>,
'Kyungmin Park' <kyungmin.park@samsung.com>,
'Andrew Morton' <akpm@linux-foundation.org>,
'KAMEZAWA Hiroyuki' <kamezawa.hiroyu@jp.fujitsu.com>,
'Ankita Garg' <ankita@in.ibm.com>,
'Daniel Walker' <dwalker@codeaurora.org>,
'Johan MOSSBERG' <johan.xx.mossberg@stericsson.com>,
'Mel Gorman' <mel@csn.ul.ie>, 'Arnd Bergmann' <arnd@arndb.de>,
'Jesse Barker' <jesse.barker@linaro.org>
Subject: RE: [PATCH 02/10] lib: genalloc: Generic allocator improvements
Date: Fri, 10 Jun 2011 14:22:05 +0200 [thread overview]
Message-ID: <000c01cc2769$02669b70$0733d250$%szyprowski@samsung.com> (raw)
In-Reply-To: <20110610122451.15af86d1@lxorguk.ukuu.org.uk>
Hello,
On Friday, June 10, 2011 1:25 PM Alan Cox wrote:
> I am curious about one thing
>
> Why do we need this allocator. Why not use allocate_resource and friends.
> The kernel generic resource handler already handles object alignment and
> subranges. It just seems to be a surplus allocator that could perhaps be
> mostly removed by using the kernel resource allocator we already have ?
genalloc was used mainly for historical reasons (in the earlier version we
were looking for direct replacement for first fit allocator).
I plan to replace it with lib/bitmap.c bitmap_* based allocator (similar like
it it is used by dma_declare_coherent_memory() and friends in
drivers/base/dma-coherent.c). We need something really simple for CMA area
management.
IMHO allocate_resource and friends a bit too heavy here, but good to know
that such allocator also exists.
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
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WARNING: multiple messages have this Message-ID (diff)
From: m.szyprowski@samsung.com (Marek Szyprowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 02/10] lib: genalloc: Generic allocator improvements
Date: Fri, 10 Jun 2011 14:22:05 +0200 [thread overview]
Message-ID: <000c01cc2769$02669b70$0733d250$%szyprowski@samsung.com> (raw)
In-Reply-To: <20110610122451.15af86d1@lxorguk.ukuu.org.uk>
Hello,
On Friday, June 10, 2011 1:25 PM Alan Cox wrote:
> I am curious about one thing
>
> Why do we need this allocator. Why not use allocate_resource and friends.
> The kernel generic resource handler already handles object alignment and
> subranges. It just seems to be a surplus allocator that could perhaps be
> mostly removed by using the kernel resource allocator we already have ?
genalloc was used mainly for historical reasons (in the earlier version we
were looking for direct replacement for first fit allocator).
I plan to replace it with lib/bitmap.c bitmap_* based allocator (similar like
it it is used by dma_declare_coherent_memory() and friends in
drivers/base/dma-coherent.c). We need something really simple for CMA area
management.
IMHO allocate_resource and friends a bit too heavy here, but good to know
that such allocator also exists.
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
next prev parent reply other threads:[~2011-06-10 12:22 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 [this message]
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
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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