From: Jens Axboe <axboe@kernel.dk>
To: redacherkaoui <redacherkaoui67@gmail.com>, io-uring@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] io_uring: document advise SQE field reuse for 64-bit lengths
Date: Mon, 16 Feb 2026 08:17:31 -0700 [thread overview]
Message-ID: <7f1f9575-b9a7-4c67-832a-d8ae45d5dcd1@kernel.dk> (raw)
In-Reply-To: <20260216113701.4650-1-redacherkaoui67@gmail.com>
On 2/16/26 4:37 AM, redacherkaoui wrote:
> IORING_OP_FADVISE and IORING_OP_MADVISE reuse SQE fields to
> support 64-bit lengths without extending struct io_uring_sqe.
>
> For IORING_OP_FADVISE, the length is carried in sqe->addr when
> non-zero, with sqe->len providing legacy fallback.
>
> For IORING_OP_MADVISE, the length is carried in sqe->off when
> non-zero, with sqe->len providing legacy fallback.
>
> This differs from the more common addr/off/len interpretation
> used by many other opcodes and can be confusing when constructing
> SQEs manually.
>
> Document the field mapping in the UAPI header to clarify the
> intended behavior and reduce the risk of misuse.
What is this patch against? Not the upstream kernel...
--
Jens Axboe
next prev parent reply other threads:[~2026-02-16 15:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-16 11:37 [PATCH] io_uring: document advise SQE field reuse for 64-bit lengths redacherkaoui
2026-02-16 15:17 ` Jens Axboe [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-02-16 16:14 redacherkaoui
2026-02-16 16:23 ` Jens Axboe
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