From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Jes Sorensen <Jes.Sorensen@redhat.com>
Cc: Roman Mamedov <rm@romanrm.net>,
neilb@suse.de, linux-raid@vger.kernel.org
Subject: Re: [PATCH 0/1] RFC: Unreliable discard performance can cripple RAID1
Date: Wed, 24 Jun 2015 21:03:52 -0400 [thread overview]
Message-ID: <yq1oak438g7.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <wrfj1th1tlis.fsf@redhat.com> (Jes Sorensen's message of "Wed, 24 Jun 2015 07:04:43 -0400")
>>>>> "Jes" == Jes Sorensen <Jes.Sorensen@redhat.com> writes:
Jes> We already disable discard per default on raid456 in a similar
Jes> manner because some of them unreliably reports discard_zeroes_data
Jes> when they in reality don't.
Jes> If there was a way to reliably detect these things it would be
Jes> fine, unfortunately there isn't.
We whitelist drives that do the right thing now.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2015-06-25 1:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-24 0:26 [PATCH 0/1] RFC: Unreliable discard performance can cripple RAID1 Jes.Sorensen
2015-06-24 0:26 ` [PATCH 1/1] raid0: Disable discard per default due to performance uncertainty Jes.Sorensen
2015-06-24 5:00 ` [PATCH 0/1] RFC: Unreliable discard performance can cripple RAID1 Roman Mamedov
2015-06-24 11:04 ` Jes Sorensen
2015-06-25 1:03 ` Martin K. Petersen [this message]
2015-06-24 7:55 ` NeilBrown
2015-06-24 11:02 ` Jes Sorensen
2015-06-25 1:05 ` Martin K. Petersen
2015-07-07 4:42 ` Mike Snitzer
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