From: Christoph Hellwig <hch@infradead.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org,
Dave Jiang <dave.jiang@intel.com>,
Luben Tuikov <ltuikov@yahoo.com>,
jgarzik@pobox.com, JBottomley@parallels.com,
Jack Wang <jack_wang@usish.com>,
Xiangliang Yu <yuxiangl@marvell.com>,
Mark Salyzyn <msalyzyn@us.xyratex.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [RFC PATCH 3/5] libsas: dynamic queue depth
Date: Tue, 20 Sep 2011 18:18:08 -0400 [thread overview]
Message-ID: <20110920221808.GC2530@infradead.org> (raw)
In-Reply-To: <20110920221038.1094.7832.stgit@localhost6.localdomain6>
On Tue, Sep 20, 2011 at 03:10:46PM -0700, Dan Williams wrote:
> The queue-depth for libsas-attached devices initializes to 32 and can
> only be increased manually via sysfs to a max of 64, while mpt2sas
> attached devices initialize to 254 and dynamically float via the
> midlayer ->change_queue_depth interface.
>
> No performance regression was observed with this change on the isci
> driver.
Looks reasonable to me.
next prev parent reply other threads:[~2011-09-20 22:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-20 22:10 [PATCH 0/5] libsas fixes discovered via isci-atapi enabling effort Dan Williams
2011-09-20 22:10 ` [PATCH 1/5] libsas: disable scanning lun > 0 on ata devices Dan Williams
2011-09-20 22:15 ` Christoph Hellwig
2011-09-21 12:28 ` Mark Salyzyn
2011-09-22 2:29 ` Jeff Garzik
2011-09-20 22:10 ` [PATCH 2/5] libsas: fix ->change_queue_{depth|type} for sata devices Dan Williams
2011-09-20 22:16 ` Christoph Hellwig
2011-09-21 12:27 ` Mark Salyzyn
2011-09-22 2:30 ` Jeff Garzik
2011-09-20 22:10 ` [RFC PATCH 3/5] libsas: dynamic queue depth Dan Williams
2011-09-20 22:18 ` Christoph Hellwig [this message]
2011-09-21 1:17 ` Jack Wang
2011-09-21 12:37 ` Mark Salyzyn
2011-09-22 1:38 ` Jack Wang
2011-09-20 22:10 ` [PATCH 4/5] mvsas: remove mvs_slave_{alloc|configure} Dan Williams
2011-09-22 2:26 ` Xiangliang Yu
2011-09-22 2:31 ` Jeff Garzik
2011-09-22 3:17 ` Williams, Dan J
2011-09-22 3:19 ` Xiangliang Yu
2011-09-20 22:11 ` [PATCH 5/5] pm8001: remove pm8001_slave_{alloc|configure} Dan Williams
2011-09-21 1:13 ` [PATCH 0/5] libsas fixes discovered via isci-atapi enabling effort Jack Wang
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=20110920221808.GC2530@infradead.org \
--to=hch@infradead.org \
--cc=JBottomley@parallels.com \
--cc=dan.j.williams@intel.com \
--cc=dave.jiang@intel.com \
--cc=hch@lst.de \
--cc=jack_wang@usish.com \
--cc=jgarzik@pobox.com \
--cc=linux-ide@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=ltuikov@yahoo.com \
--cc=msalyzyn@us.xyratex.com \
--cc=yuxiangl@marvell.com \
/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.