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Message-ID: <c62f99d0-184b-4158-b609-d1e687ba4121@kernel.dk>
Date: Wed, 2 Apr 2025 07:09:17 -0600
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Subject: Re: [PATCH 0/4] io_uring: support vectored fixed kernel buffer
To: Pavel Begunkov <asml.silence@gmail.com>, Ming Lei <ming.lei@redhat.com>,
io-uring@vger.kernel.org
Cc: Caleb Sander Mateos <csander@purestorage.com>
References: <20250325135155.935398-1-ming.lei@redhat.com>
<Z-zt3YraxRSHVIWv@fedora> <c252ec4e-aa97-4831-8062-43fcd1065324@kernel.dk>
<26767f79-4ed3-487e-aba8-aa6ff124b2c3@gmail.com>
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From: Jens Axboe <axboe@kernel.dk>
In-Reply-To: <26767f79-4ed3-487e-aba8-aa6ff124b2c3@gmail.com>
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On 4/2/25 6:13 AM, Pavel Begunkov wrote:
> On 4/2/25 12:59, Jens Axboe wrote:
>> On 4/2/25 1:57 AM, Ming Lei wrote:
>>> On Tue, Mar 25, 2025 at 09:51:49PM +0800, Ming Lei wrote:
>>>> Hello Jens,
>>>>
>>>> This patchset supports vectored fixed buffer for kernel bvec buffer,
>>>> and use it on for ublk/stripe.
>>>>
>>>> Please review.
>>>>
>>>> Thanks,
>>>> Ming
>>>>
>>>>
>>>> Ming Lei (4):
>>>> io_uring: add validate_fixed_range() for validate fixed buffer
>>>> block: add for_each_mp_bvec()
>>>> io_uring: support vectored kernel fixed buffer
>>>> selftests: ublk: enable zero copy for stripe target
>>>
>>> Hello,
>>>
>>> Ping...
>>
>> Looks fine to me and pretty straight forward, but it was in the merge
>> window. Anything that makes this important for 6.15? We can still
>> include it if so. If not, let's take a look for 6.16 when the merge
>> window closes.
>
> fwiw, I looked through it, looks correct, but it'd be a good
> to test it aside from ublk. I guess I'll just extend a kernel
> hack I used before.
>
> No opinion on 6.15 vs 6.16, but the argument might be to have
> it in the same release with ublk zc, and have less probing
> for the user.
That's a good argument for 6.15 actually, rather than split the vectored
feature over two releases... I'll queue it up.
--
Jens Axboe