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Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework

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From: Michał Nazarewicz
Subject: Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework
Date: Wednesday, August 25, 2010 - 9:01 pm

KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

On embedded systems it may be like half of the RAM.  Or a quarter.  So bigger
granularity could be desired on some platforms.


That's how CMA works at the moment.  But if I understand you correctly, what
you are proposing would allow to reserve memory *at* *runtime* long after system
has booted.  This would be a nice feature as well though.



I'll try to look at it then.


Hibernation was not considered as of yet but I think it's device driver's
responsibility more then CMA's especially since it may make little sense to save
some of the buffers -- ie. no need to keep a frame from camera since it'll be
overwritten just after system wakes up from hibernation.  It may also be better
to stop playback and resume it later on rather than trying to save decoder's
state.  Again though, I haven't thought about hibernation as of yet.

-- 
Best regards,                                        _     _
| Humble Liege of Serenely Enlightened Majesty of  o' \,=./ `o
| Computer Science,  Michał "mina86" Nazarewicz       (o o)
+----[mina86*mina86.com]---[mina86*jabber.org]----ooO--(_)--Ooo--

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Messages in current thread:
[PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework, Michal Nazarewicz, (Fri Aug 20, 2:50 am)
[PATCH/RFCv4 1/6] lib: rbtree: rb_root_init() function added, Michal Nazarewicz, (Fri Aug 20, 2:50 am)
[PATCH/RFCv4 2/6] mm: cma: Contiguous Memory Allocator added, Michal Nazarewicz, (Fri Aug 20, 2:50 am)
[PATCH/RFCv4 3/6] mm: cma: Added SysFS support, Michal Nazarewicz, (Fri Aug 20, 2:50 am)
[PATCH/RFCv4 4/6] mm: cma: Added command line parameters s ..., Michal Nazarewicz, (Fri Aug 20, 2:50 am)
[PATCH/RFCv4 5/6] mm: cma: Test device and application added, Michal Nazarewicz, (Fri Aug 20, 2:50 am)
[PATCH/RFCv4 6/6] arm: Added CMA to Aquila and Goni, Michal Nazarewicz, (Fri Aug 20, 2:50 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Fri Aug 20, 6:15 am)
Re: [PATCH/RFCv4 2/6] mm: cma: Contiguous Memory Allocator ..., Konrad Rzeszutek Wilk, (Wed Aug 25, 1:32 pm)
Re: [PATCH/RFCv4 3/6] mm: cma: Added SysFS support, Konrad Rzeszutek Wilk, (Wed Aug 25, 1:37 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Andrew Morton, (Wed Aug 25, 3:58 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Daniel Walker, (Wed Aug 25, 4:26 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Jonathan Corbet, (Wed Aug 25, 4:31 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Wed Aug 25, 5:58 pm)
Re: [PATCH/RFCv4 3/6] mm: cma: Added SysFS support, Michał Nazarewicz, (Wed Aug 25, 6:20 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Pawel Osciak, (Wed Aug 25, 6:22 pm)
Re: [PATCH/RFCv4 2/6] mm: cma: Contiguous Memory Allocator ..., Michał Nazarewicz, (Wed Aug 25, 6:22 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Michał Nazarewicz, (Wed Aug 25, 6:28 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Michał Nazarewicz, (Wed Aug 25, 6:38 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Pawel Osciak, (Wed Aug 25, 6:38 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Michał Nazarewicz, (Wed Aug 25, 6:49 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Michał Nazarewicz, (Wed Aug 25, 7:12 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Michał Nazarewicz, (Wed Aug 25, 7:40 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Wed Aug 25, 7:49 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Wed Aug 25, 7:50 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Wed Aug 25, 8:04 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Wed Aug 25, 8:44 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Michał Nazarewicz, (Wed Aug 25, 9:01 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Wed Aug 25, 9:06 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Wed Aug 25, 9:14 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Wed Aug 25, 9:30 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Wed Aug 25, 9:39 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Américo Wang, (Wed Aug 25, 10:54 pm)
[PATCH/RFCv4.1 2/6] mm: cma: Contiguous Memory Allocator added, Michal Nazarewicz, (Wed Aug 25, 11:25 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Thu Aug 26, 1:17 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Thu Aug 26, 1:18 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Thu Aug 26, 1:20 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Thu Aug 26, 2:29 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Thu Aug 26, 2:36 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Thu Aug 26, 3:06 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Mel Gorman, (Thu Aug 26, 3:12 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Mel Gorman, (Thu Aug 26, 3:18 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Thu Aug 26, 3:21 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Thu Aug 26, 4:05 am)
Re: [PATCH/RFCv4 2/6] mm: cma: Contiguous Memory Allocator ..., Mel Gorman, (Thu Aug 26, 6:47 am)
Re: [PATCH/RFCv4 2/6] mm: cma: Contiguous Memory Allocator ..., Michał Nazarewicz, (Thu Aug 26, 7:09 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Michał Nazarewicz, (Thu Aug 26, 7:41 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Fri Aug 27, 1:16 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Fri Aug 27, 1:37 am)
Re: [PATCH/RFCv4 2/6] mm: cma: Contiguous Memory Allocator ..., Hans Verkuil, (Sat Aug 28, 5:37 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Hans Verkuil, (Sat Aug 28, 6:08 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Sat Aug 28, 6:34 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Hans Verkuil, (Sat Aug 28, 6:58 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Peter Zijlstra, (Sat Aug 28, 7:16 am)
Re: [PATCH/RFCv4 2/6] mm: cma: Contiguous Memory Allocator ..., Michał Nazarewicz, (Sat Aug 28, 6:48 pm)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Clemens Ladisch, (Mon Aug 30, 1:27 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Thu Sep 2, 1:54 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Fri Sep 3, 3:29 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., Minchan Kim, (Sun Sep 5, 8:57 am)
Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator fram ..., KAMEZAWA Hiroyuki, (Sun Sep 5, 5:08 pm)