linux-kernel - Re: [PATCH v2 5/8] docs: sysfs-block: document stable

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Message-ID: <7d9f9469-5347-780a-c560-77fca6e7008b@acm.org>
Date:   Wed, 8 Dec 2021 10:01:10 -0800
From:   Bart Van Assche <bvanassche@....org>
To:     Eric Biggers <ebiggers@...nel.org>, linux-block@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Cc:     linux-doc@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, Hannes Reinecke <hare@...e.de>
Subject: Re: [PATCH v2 5/8] docs: sysfs-block: document stable_writes

On 12/7/21 4:56 PM, Eric Biggers wrote:
> +What:		/sys/block/<disk>/queue/stable_writes
> +Date:		September 2020
> +Contact:	linux-block@...r.kernel.org
> +Description:
> +		[RW] If the device requires that memory must not be modified
> +		while it is being written out to disk, this file will contain
> +		'1'.  Otherwise it will contain '0'.  This file is writable for
> +		testing purposes.

Hmm ... doesn't this attribute apply to the process of transferring data from
host memory to the device instead of to writing to the disk? Whether data goes
to the storage device cache or to the storage medium itself depends on attributes
like FUA.

Thanks,

Bart.