From: martin.petersen@oracle.com (Martin K. Petersen)
Subject: [PATCH] NVMe: Skip namespaces with interleaved meta-data
Date: Wed, 28 Jan 2015 17:08:41 -0500 [thread overview]
Message-ID: <yq1iofqimmu.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <54C958D1.3010209@ranbarg.com> (Paul Grabinar's message of "Wed, 28 Jan 2015 21:46:57 +0000")
>>>>> "Paul" == Paul Grabinar <paul.grabinar at ranbarg.com> writes:
Paul> What happens if you switch on and off meta-data dynamically with
Paul> /sys/block/<bdev>/integrity/write_generate and
Paul> /sys/block/<bdev>/integrity/read_verify?
I think the best way to go about dealing with all this is to set PRACT=1
if no bip is attached to a bio bound for a name space formatted with PI.
That's essentially how it works in SCSI (albeit for entirely different
reasons -- the DIF nexus is independent of the DIX ditto).
In retrospect I wish we had switched the polarity of PRACT so that you'd
have to explicitly request the PI to be passed to the OS.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2015-01-28 22:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-27 18:07 [PATCH] NVMe: Skip namespaces with interleaved meta-data Keith Busch
2015-01-27 21:57 ` David Darrington
2015-01-27 22:09 ` Keith Busch
2015-01-28 1:21 ` Keith Busch
2015-01-28 1:39 ` Martin K. Petersen
2015-01-28 15:11 ` Keith Busch
2015-01-28 20:50 ` Paul Grabinar
2015-01-28 21:16 ` Keith Busch
2015-01-28 21:46 ` Paul Grabinar
2015-01-28 22:08 ` Martin K. Petersen [this message]
2015-01-28 22:17 ` Keith Busch
2015-01-28 22:28 ` Martin K. Petersen
2015-01-29 0:09 ` Keith Busch
2015-01-29 0:57 ` Martin K. Petersen
2015-01-29 15:44 ` Keith Busch
2015-01-30 0:41 ` Martin K. Petersen
2015-01-30 0:57 ` Keith Busch
2015-01-28 22:17 ` Andrey Kuzmin
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