[Linaro-mm-sig] [PATCHv17 0/11] Contiguous Memory Allocator

Michal Nazarewicz
2011-11-18T21:26:49Z

On Fri, 18 Nov 2011 22:20:48 +0100, sandeep patil <psandeep.s@gmail.com> wrote:
> I am running a simple test to allocate contiguous regions and write a log on
> in a file on sdcard simultaneously. I can reproduce this migration failure 100%
> times with it.
> when I tracked the pages that failed to migrate, I found them on the
> buffer head lru
> list with a reference held on the buffer_head in the page, which
> causes drop_buffers()
> to fail.
>
> So, i guess my question is, until all the migration failures are
> tracked down and fixed,
> is there a plan to retry the contiguous allocation from a new range in
> the CMA region?

No. Current CMA implementation will stick to the same range of pages also
on consequent allocations of the same size.

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