Re: [Lsf-pc] [LSF/MM ATTEND] block: multipage bvecs

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On Thu, Mar 3, 2016 at 4:58 PM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Sat, Feb 27, 2016 at 12:33:00AM +0800, Ming Lei wrote:
>> Hi,
>>
>> I'd like to participate in LSF/MM and discuss multipage bvecs.
>>
>> Kent posted the idea[1] before, but never pushed out.
>> I have studied multipage bvecs for a while, and think
>> it is a good idea to improve block subsystem.
>>
>> Multipage bvecs means that one 'struct bio_bvec' can hold
>> multiple pages which are physically contiguous instead
>> of one single page used in current kernel.
>
> Btw, do you have a current version of the multipage biovec patches
> somewhere?

The helpers change are basically ready, and one new parameter is added
to bio_for_each_segment_all(), so its all callers need this kind of change,

Also bio_clone() & bvec updating isn't started, but this kind of work
should not be very difficult to complete.

So the work is in progressing, but I can setup a tree and make it public
if anyone is intereseted in.


Thanks,
Ming Lei
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