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From: =?Windows-1252?Q?Georg_Sch=F6nberger?= <g.schoenberger@xortex.com>
Subject: Re: XFS and nobarrier with SSDs
Date: Mon, 14 Dec 2015 10:34:30 +0000
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To: Christoph Hellwig <hch@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>, XFS mailing list <xfs@oss.sgi.com>, Linux Block mailing list <linux-block@vger.kernel.org>, Jeff Moyer <jmoyer@redhat.com>, Linux FS-Devel <linux-fsdevel@vger.kernel.org>

On 2015-12-14 11:27, Christoph Hellwig wrote:
> On Mon, Dec 14, 2015 at 10:18:54AM +0000, Georg Sch?nberger wrote:
>>> Or to phrase it
>>> differently:  If nobarrier makes a difference skipping it is not safe.
>> I do not fully understand that sentence, what do you mean by "makes a
>> difference" and "skipping is not safe"?
> The rule of thumb is: if nobarrier makes your workload run faster you
> should not be using it, aka: don't use it.
OK, thanks for clarification.
Should the XFS FAQ be updated?
*http://xfs.org/index.php/XFS_FAQ#Q._Should_barriers_be_enabled_with_storage_which_has_a_persistent_write_cache.3F
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