Re: [PATCH v3 3/7 UPDATE] perf tools: Add option for the path of buildid dsos under symfs

[David Ahern]

On 5/17/16 8:48 PM, Hekuang wrote:
> > I don't understand why dso-prefix option is needed? Why make me type
> > yet more options to the analysis command? Why can't the directory be
> > located under the symfs tree in a known location and populated the
> > same way it is without symfs?
> Because the default buidid folder path is $HOME/.debug/.buildid,
> and this $HOME is on the target machine, not the same as $HOME
> on the host. Without that option, we need to copy $HOME/.debug/.buildid
> to the 'known location in symfs', that's also an extra work.

My argument for symfs is that $HOME is not relevant or if it is the path 
is symfs/$HOME. The use case is dealing with countless images -- some 
development, some production. I should be able to nuke the symfs when 
the analysis is done and everything related to it is gone. With the 
$HOME/.debug path it just grows on and on with no real means of pruning it.

If the vdsos are for a particular symfs then why aren't the vdso's under 
it in a known location?