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

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From: KAMEZAWA Hiroyuki
Subject: Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework
Date: Wednesday, August 25, 2010 - 7:50 pm

On Thu, 26 Aug 2010 04:12:10 +0200
Michał Nazarewicz <m.nazarewicz@samsung.com> wrote:


Now, x86's section size is 
==
#ifdef CONFIG_X86_32
# ifdef CONFIG_X86_PAE
#  define SECTION_SIZE_BITS     29
#  define MAX_PHYSADDR_BITS     36
#  define MAX_PHYSMEM_BITS      36
# else
#  define SECTION_SIZE_BITS     26
#  define MAX_PHYSADDR_BITS     32
#  define MAX_PHYSMEM_BITS      32
# endif
#else /* CONFIG_X86_32 */
# define SECTION_SIZE_BITS      27 /* matt - 128 is convenient right now */
# define MAX_PHYSADDR_BITS      44
# define MAX_PHYSMEM_BITS       46
#endif
==

128MB...too big ? But it's depend on config.

IBM's ppc guys used 16MB section, and recently, a new interface to shrink
the number of /sys files are added, maybe usable.

Something good with this approach will be you can create "cma" memory
before installing driver.

But yes, complicated and need some works.

Bye,
-Kame

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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)