| To: | Georg Sch?nberger <g.schoenberger@xxxxxxxxxx> |
|---|---|
| Subject: | Re: XFS and nobarrier with SSDs |
| From: | Christoph Hellwig <hch@xxxxxxxxxxxxx> |
| Date: | Mon, 14 Dec 2015 02:27:50 -0800 |
| Cc: | Christoph Hellwig <hch@xxxxxxxxxxxxx>, Martin Steigerwald <martin@xxxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Linux FS-Devel <linux-fsdevel@xxxxxxxxxxxxxxx>, Jeff Moyer <jmoyer@xxxxxxxxxx>, Linux Block mailing list <linux-block@xxxxxxxxxxxxxxx>, XFS mailing list <xfs@xxxxxxxxxxx> |
| Delivered-to: | xfs@xxxxxxxxxxx |
| In-reply-to: | <566E978E.2070502@xxxxxxxxxx> |
| References: | <E127700EFE58FD45BD6298EAC813FA42020D8173@xxxxxxxxxxxxxxxxxxxxxx> <3496214.YTSKClH6pV@merkaba> <566E6524.6070401@xxxxxxxxxx> <3911767.qVqsL1TcMv@merkaba> <20151214095823.GA30662@xxxxxxxxxxxxx> <566E978E.2070502@xxxxxxxxxx> |
| User-agent: | Mutt/1.5.23 (2014-03-12) |
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. |
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