From: Rick Lindsley <ricklind@us.ibm.com>
To: Michael Buesch <fsdeveloper@yahoo.de>
Cc: linux kernel mailing list <linux-kernel@vger.kernel.org>,
linux-ide@vger.kernel.org
Subject: Re: [2.5.70] possible problem with /dev/diskstats
Date: Sun, 01 Jun 2003 21:23:11 -0700 [thread overview]
Message-ID: <200306020423.h524NBd02594@owlet.beaverton.ibm.com> (raw)
In-Reply-To: Your message of "Sun, 01 Jun 2003 21:31:31 +0200." <200306012131.32006.fsdeveloper@yahoo.de>
I've done some disk-io (compiled some software) and the values
now are even lower:
Interesting, yes, you now have 60 fewer "I/O's in flight."
Where exactly is the code in the kernel, that produces the diskstats file,
so I can try grepping through it?
The I/O's in flight are incremented in drive_stat_acct() (see ll_rw_blk.c)
and decremented in attempt_merge() and end_that_request_last(). My gut feel
is that end_that_request_last() is getting called more often than expected
via some interesting path, but I've nothing right now to back that up.
Rick
prev parent reply other threads:[~2003-06-02 4:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200306011905.h51J57Q03929@owlet.beaverton.ibm.com>
2003-06-01 19:31 ` [2.5.70] possible problem with /dev/diskstats Michael Buesch
2003-06-02 4:23 ` Rick Lindsley [this message]
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=200306020423.h524NBd02594@owlet.beaverton.ibm.com \
--to=ricklind@us.ibm.com \
--cc=fsdeveloper@yahoo.de \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox