On Fri, 18 Nov 2011 22:20:48 +0100, sandeep patil wrote:
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?
2011/11/18 Michal Nazarewicz <mina86@xxxxxxxxxx>:
No. Current CMA implementation will stick to the same range of pages also
on consequent allocations of the same size.
On Sat, 19 Nov 2011 00:30:49 +0100, sandeep patil <psandeep.s@xxxxxxxxx> wrote:
Doesn't that mean the drivers that fail to allocate from contiguous DMA region
will fail, if the migration fails?
Yes.
I have some ideas how that could be mitigated. The easiest would be to try
another region to allocate from on failure. More complicated could be to try
and wait for the I/O transfer to finish. I'll try to work on it during
upcoming week.
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