From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>,
device-mapper development <dm-devel@redhat.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: Re: [LSF/MM ATTEND] discuss blk-mq related to DM-multipath and status of XCOPY
Date: Thu, 08 Jan 2015 09:39:10 -0500 [thread overview]
Message-ID: <yq1vbkh2v75.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <54AE2436.2000004@suse.de> (Hannes Reinecke's message of "Thu, 08 Jan 2015 07:31:18 +0100")
>>>>> "Hannes" == Hannes Reinecke <hare@suse.de> writes:
Hannes> But the array might prioritize 'normal' I/O requests, and treat
Hannes> XCOPY with a lower priority. So given enough load XCOPY might
Hannes> actually be slower than a normal copy ...
Yes, but may have lower impact on concurrent I/O.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2015-01-08 14:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-04 17:16 [LSF/MM ATTEND] discuss blk-mq related to DM-multipath and status of XCOPY Mike Snitzer
2015-01-05 13:25 ` [dm-devel] " Hannes Reinecke
2015-01-06 23:55 ` Martin K. Petersen
2015-01-07 8:32 ` Hannes Reinecke
2015-01-07 23:39 ` Martin K. Petersen
2015-01-08 6:31 ` Hannes Reinecke
2015-01-08 14:39 ` Martin K. Petersen [this message]
2015-01-06 23:52 ` Martin K. Petersen
2015-01-07 17:00 ` Nicholas A. Bellinger
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=yq1vbkh2v75.fsf@sermon.lab.mkp.net \
--to=martin.petersen@oracle.com \
--cc=dm-devel@redhat.com \
--cc=hare@suse.de \
--cc=hch@infradead.org \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.