Re: [2.5.70] possible problem with /dev/diskstats

[Maneesh Soni <maneesh@in.ibm.com>]

On Sat, May 31, 2003 at 10:40:21PM +0000, Michael Buesch wrote:
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> 
> Hi.
> 
> I've just played around with my server (that has actualy no load)
> and I recognized something strange in /dev/diskstats.
> 
> Documentation/iostats.txt says about diskstats:
> [SNIP]
> Field  9 -- # of I/Os currently in progress
>     The only field that should go to zero. Incremented as requests are
>     given to appropriate request_queue_t and decremented as they finish.
> [SNIP]
> 
> But here is a cat /proc/diskstats:
>    1    0 ram0 0 0 0 0 0 0 0 0 0 0 0
>    1    1 ram1 0 0 0 0 0 0 0 0 0 0 0
>    1    2 ram2 0 0 0 0 0 0 0 0 0 0 0
>    1    3 ram3 0 0 0 0 0 0 0 0 0 0 0
>    1    4 ram4 0 0 0 0 0 0 0 0 0 0 0
>    1    5 ram5 0 0 0 0 0 0 0 0 0 0 0
>    1    6 ram6 0 0 0 0 0 0 0 0 0 0 0
>    1    7 ram7 0 0 0 0 0 0 0 0 0 0 0
>    1    8 ram8 0 0 0 0 0 0 0 0 0 0 0
>    1    9 ram9 0 0 0 0 0 0 0 0 0 0 0
>    1   10 ram10 0 0 0 0 0 0 0 0 0 0 0
>    1   11 ram11 0 0 0 0 0 0 0 0 0 0 0
>    1   12 ram12 0 0 0 0 0 0 0 0 0 0 0
>    1   13 ram13 0 0 0 0 0 0 0 0 0 0 0
>    1   14 ram14 0 0 0 0 0 0 0 0 0 0 0
>    1   15 ram15 0 0 0 0 0 0 0 0 0 0 0

Rick,

ramdisk stats are also always zero whether you do any IO or not. Any idea
where this can be corrected.

Thanks
Maneesh


-- 
Maneesh Soni
IBM Linux Technology Center, 
IBM India Software Lab, Bangalore.
Phone: +91-80-5044999 email: maneesh@in.ibm.com
http://lse.sourceforge.net/