linux-kernel - Re: [PATCH v4 16/19] selftests: ublk: support non-O

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Message-ID: <aV-kgiZlP7DBz0bx@fedora>
Date: Thu, 8 Jan 2026 20:35:14 +0800
From: Ming Lei <ming.lei@...hat.com>
To: Caleb Sander Mateos <csander@...estorage.com>
Cc: Jens Axboe <axboe@...nel.dk>, Shuah Khan <shuah@...nel.org>,
	linux-block@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Stanley Zhang <stazhang@...estorage.com>,
	Uday Shankar <ushankar@...estorage.com>,
	"Martin K . Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH v4 16/19] selftests: ublk: support non-O_DIRECT backing
 files

On Thu, Jan 08, 2026 at 02:19:44AM -0700, Caleb Sander Mateos wrote:
> A subsequent commit will add support for using a backing file to store
> integrity data. Since integrity data is accessed in intervals of
> metadata_size, which may be much smaller than a logical block on the
> backing device, direct I/O cannot be used. Add an argument to
> backing_file_tgt_init() to specify the number of files to open for
> direct I/O. The remaining files will use buffered I/O. For now, continue
> to request direct I/O for all the files.
> 
> Signed-off-by: Caleb Sander Mateos <csander@...estorage.com>

Reviewed-by: Ming Lei <ming.lei@...hat.com>
 
Thanks,
Ming