Re: mountstats

["Steve French (smfltc)" <smfltc@us.ibm.com>]

Trond Myklebust wrote:

>On Tue, 2006-08-08 at 17:21 -0500, Steve French wrote:
>  
>
>>Why are mountstats per process (e.g. "cat /proc/1/mountstats")?
>>    
>>
>
>Namespaces are per-process, hence so are the per-mountpoint mountstats.
>
>Cheers,
>  Trond
>
>  
>
Namespaces are per process but superblocks are not.  It could be 
confusing to some users. Locating
these stats [only] in the perprocess information (alongside some truly 
per-process stats) creates
the impression that the stats are those I/Os for that per-process for 
that mount while
the stats displayed are the stats for the superblock (across all 
processes that have the superblock
in the namespace).  I realize that it would not really be possible to 
show per-process/per-mount stats
but it seems odd that the per-superblock mountstats show up only here, 
rather in a more intuitive
location(s) such as /proc/mountstats [as well].