On Wed, Jun 22, 2016 at 4:29 PM, Sagi Grimberg <sagi@xxxxxxxxxxx> wrote:
>
>>> Ensure the MR's PBL array never occupies the last 8 bytes of a page.
>>> This eliminates random "Local Protection Error" flushes when SLUB
>>> debugging is enabled.
>>>
>>> Fixes: 1b2cd0fc673c ('IB/mlx4: Support the new memory registration API')
>>
>>
>> Can't the driver advertize smaller quantity for what's occupies later
>> those last eight bytes (255 or 511 of
>> attr XX instead of 256 or 512)?
> Not sure I understand your question. Are you suggesting that the driver
> would expose that it's capable of 256 pages per MR?
I am asking if we can advertize something else what would cause not to
fall into the last
eight bytes on a page, e.g if we fall there since we advertize for
some attr N, lets advertize N-1
just asking
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