From: Eric Sandeen <sandeen@sandeen.net>
To: Richard Bade <hitrich@gmail.com>, xfs@oss.sgi.com
Subject: Re: XFS and nobarriers on Intel SSD
Date: Thu, 3 Sep 2015 08:43:16 -0500 [thread overview]
Message-ID: <55E84E74.9050404@sandeen.net> (raw)
In-Reply-To: <55E84C40.8020602@sandeen.net>
On 9/3/15 8:33 AM, Eric Sandeen wrote:
> On 9/2/15 9:24 PM, Richard Bade wrote:
...
>> The reason I am asking about this is that we are seeing some
>> significant I/O delays on the disks causing a “SCSI Task Abort” from
>> the OS. This seems to be triggered by the drive receiving a
>> “Synchronize cache command”. My current thinking is that setting no
>> barriers will stop the drive receiving a sync command and therefore
>> stop the I/O delay associated with it.
>
> Interesting, I thought that usually devices with battery-backed cache
> will just ignore synchronize cache commands.
Or more precisely, the device should advertise itself in such a way that
the commands wouldn't be sent, even if nobarrier wasn't specified...
-Eric
> But if not, then sure, maybe that's the issue.
>
> -Eric
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prev parent reply other threads:[~2015-09-03 13:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-03 2:24 XFS and nobarriers on Intel SSD Richard Bade
2015-09-03 13:33 ` Eric Sandeen
2015-09-03 13:43 ` Eric Sandeen [this message]
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