Re: [Fwd: Re: Patch for inconsistent recording of block device statistics]

[Jens Axboe]

On Tue, Oct 25 2005, Mark Seger wrote:
> yes, the patch worked.  The general discussion was that the byte counter 
> gets incremented when requests are queued, not when they're acted upon 
> as is the case with the count of I/Os.  As a result, the disk write 
> numbers don't make any sense reporting impossibly high numbers (>100MB 
> and as high as 450!) during some times and at other reporting zeros.  
> The entire time, the I/O counts are happily showing what appear to be 
> correct numbers.  Here's a snapshot taken during a portion of a 2GB file 
> file to /tmp.

I've applied my path to the for-linus git branch, I will push it for
2.6.15 as well. Thanks for reminding me!

-- 
Jens Axboe

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