From: Matthew Wilcox <matthew@wil.cx>
To: Andrew Morton <akpm@osdl.org>
Cc: Martin Peschke <mp3@de.ibm.com>,
linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [Patch] SCSI I/O statistics
Date: Tue, 26 Sep 2006 12:23:47 -0600 [thread overview]
Message-ID: <20060926182347.GH5017@parisc-linux.org> (raw)
In-Reply-To: <20060926103930.471b75a5.akpm@osdl.org>
On Tue, Sep 26, 2006 at 10:39:30AM -0700, Andrew Morton wrote:
> - Should it have been done at the block layer rather than at the scsi layer?
This was already mentioned when he sent it to linux-scsi a few days ago.
There are scsi commands which bypass the block layer, such as SG_IO, and
block layer stats can make an extremely busy disc look not busy.
next prev parent reply other threads:[~2006-09-26 18:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-26 15:56 [Patch] SCSI I/O statistics Martin Peschke
2006-09-26 17:39 ` Andrew Morton
2006-09-26 18:23 ` Matthew Wilcox [this message]
2006-09-26 21:45 ` Mike Christie
2006-09-27 14:35 ` Martin Peschke
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