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From: Ming Lei <ming.lei@redhat.com>
To: Caleb Sander Mateos <csander@purestorage.com>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ublk: update UBLK_F_SUPPORT_ZERO_COPY comment in UAPI header
Date: Mon, 23 Jun 2025 09:41:53 +0800	[thread overview]
Message-ID: <aFiw4eaajxKEOVa7@fedora> (raw)
In-Reply-To: <20250621171015.354932-1-csander@purestorage.com>

On Sat, Jun 21, 2025 at 11:10:14AM -0600, Caleb Sander Mateos wrote:
> UBLK_F_SUPPORT_ZERO_COPY has a very old comment describing the initial
> idea for how zero-copy would be implemented. The actual implementation
> added in commit 1f6540e2aabb ("ublk: zc register/unregister bvec") uses
> io_uring registered buffers rather than shared memory mapping.
> Remove the inaccurate remarks about mapping ublk request memory into the
> ublk server's address space and requiring 4K block size. Replace them
> with a description of the current zero-copy mechanism.
> 
> Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>

Reviewed-by: Ming Lei <ming.lei@redhat.com>

thanks,
Ming


  reply	other threads:[~2025-06-23  1:42 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-06-21 17:10 [PATCH] ublk: update UBLK_F_SUPPORT_ZERO_COPY comment in UAPI header Caleb Sander Mateos
2025-06-23  1:41 ` Ming Lei [this message]
2025-06-24 14:51 ` Jens Axboe

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