From: Mark Lord <lkml@rtr.ca>
To: Tejun Heo <htejun@gmail.com>
Cc: Jens Axboe <jens.axboe@oracle.com>,
Rene Herman <rene.herman@gmail.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-kernel@vger.kernel.org, Linus Torvalds <torvalds@osdl.org>
Subject: Re: 2.6.20-rc2+: CFQ halving disk throughput.
Date: Tue, 02 Jan 2007 12:35:40 -0500 [thread overview]
Message-ID: <459A97EC.8090903@rtr.ca> (raw)
In-Reply-To: <459A8E17.80601@gmail.com>
Tejun Heo wrote:
>
> OT but care to make -i and -I work equivalently? Such that -i reports
> more detailed info and user can dump stored id block.
hdparm -I works just fine now.
hdparm -i requires the HDIO_GET_IDENTITY ioctl() from drivers/ide,
to retrieve the "boot time" copy of the identify block, before any
mods are made by the driver. But in recent years, drivers/ide has
broken it, in that it tries to maintain the "boot time" copy in sync
with the on-drive copy. Kinda makes -i pointless.
Is there a way to retrieve the libata cached copy of the ID block?
How?
>Support for IDENTIFY PACKET DEVICE would be nice too.
It already does that, using HDIO_DRIVE_CMD to retrieve it
in the same way as for regular IDENTIFY DEVICE commands.
In hdparm-7.0, I'll have it use ATA passthrough when possible
for most/all commands.
Cheers
next prev parent reply other threads:[~2007-01-02 17:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-20 13:37 PATA -- pata_amd on 2.6.19 fails to IDENTIFY my DVD-ROM Rene Herman
2006-12-27 7:19 ` Tejun Heo
2006-12-27 17:50 ` Rene Herman
2006-12-28 2:24 ` Tejun Heo
2007-01-01 22:46 ` 2.6.20-rc2+: CFQ halving disk throughput Rene Herman
2007-01-01 22:56 ` Rene Herman
2007-01-01 23:30 ` Linus Torvalds
2007-01-01 23:28 ` Mark Lord
2007-01-02 8:34 ` Jens Axboe
2007-01-02 15:01 ` Mark Lord
2007-01-02 16:53 ` Tejun Heo
2007-01-02 17:35 ` Mark Lord [this message]
2007-01-02 17:53 ` Tejun Heo
2007-01-02 18:10 ` Mark Lord
2007-01-02 17:09 ` Jan Engelhardt
2007-01-02 5:36 ` Andrew Morton
2007-01-02 8:44 ` Jens Axboe
2007-01-02 10:24 ` Rene Herman
2007-01-02 11:57 ` Jens Axboe
2007-01-02 12:10 ` Jens Axboe
2007-01-02 15:12 ` Mark Lord
2007-01-02 15:14 ` Jens Axboe
2007-01-02 15:40 ` Mark Lord
2007-01-02 15:45 ` Jens Axboe
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=459A97EC.8090903@rtr.ca \
--to=lkml@rtr.ca \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=htejun@gmail.com \
--cc=jens.axboe@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rene.herman@gmail.com \
--cc=torvalds@osdl.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox