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

[Américo Wang]

On Thu, Aug 26, 2010 at 06:01:56AM +0200, Michał Nazarewicz wrote:
>KAMEZAWA Hiroyuki <kamezawa.hiroyu at jp.fujitsu.com> wrote:
>>128MB...too big ? But it's depend on config.
>
>On embedded systems it may be like half of the RAM.  Or a quarter.  So bigger
>granularity could be desired on some platforms.
>
>>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.
>
>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.
>

Yeah, if we can do this, that will avoid rebooting for kdump to reserve
memory.

Thanks.