linux-kernel - Re: [PATCH] fat: Add nobarrier to workaround the strange behavior of device

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Message-ID: <20190628160230.GA24232@infradead.org>
Date:   Fri, 28 Jun 2019 09:02:30 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] fat: Add nobarrier to workaround the strange behavior of
 device

On Sat, Jun 29, 2019 at 12:03:46AM +0900, OGAWA Hirofumi wrote:
> I see, sounds like good though. Does it work for all stable versions?
> Can it disable only flush command without other effect? And it would be
> better to be normal user controllable easily.

The option was added in 2.6.17, so it's been around forever.  But
no, it obviously is not user exposed as using it on a normal drive
can lead to data loss.