Re: [PATCH V4 1/3] block: Allow mapping of vmalloc-ed buffers

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On 2019/06/27 17:25, Christoph Hellwig wrote:
> On Thu, Jun 27, 2019 at 08:17:08AM +0000, Damien Le Moal wrote:
>>> Are your sure that invalidate[|flush]_kernel_vmap_range is needed for
>>> bio_copy_kernel? The vmalloc buffer isn't involved in IO, and only
>>> accessed by CPU.
>>
>> Not sure at all. I am a little out of my league here.
>> Christoph mentioned that this is necessary.
>>
>> Christoph, can you confirm ?
> 
> Ming is right.  Sorry for misleading you.

No problem. Sending a V5 with cleanups.

Thanks !


-- 
Damien Le Moal
Western Digital Research




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