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Re: XFS doesn't correctly account for IO-Wait for directory reading

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: XFS doesn't correctly account for IO-Wait for directory reading
From: Matthias Schniedermeyer <ms@xxxxxxx>
Date: Wed, 23 Jan 2008 15:24:42 +0100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20080123121741.GA24405@xxxxxxxxxxxxx>
References: <20080123110027.GA10366@xxxxxxx> <20080123121741.GA24405@xxxxxxxxxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
User-agent: Mutt/1.5.17+20080114 (2008-01-14)
On 23.01.2008 12:17, Christoph Hellwig wrote:
> 
> Try this one-liner patch which should give you much better I/O wait
> reporting.  There's some more I/O waits hidden in the log code, but to
> fix this we'd need to dig into the sv_t abstraction.  Given that it only
> has four users left I'm probably going to simply remove it and fix the
> I/O wait accounting while I'm at it.

Either with 2.6.23.12 & 2.6.24-git-HEAD, and the shown line changed, the 
%wa reported by top is still at 0.0





Bis denn

-- 
Real Programmers consider "what you see is what you get" to be just as 
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wants a "you asked for it, you got it" text editor -- complicated, 
cryptic, powerful, unforgiving, dangerous.


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