Re: [PATCH] perf tools: Add rootfs option for off-box analysis using specified tree

["David S. Ahern" <daahern@cisco.com>]

On 11/21/10 09:34, Arnaldo Carvalho de Melo wrote:
> Em Sun, Nov 21, 2010 at 09:17:55AM -0700, y@cisco.com escreveu:
>> From: David Ahern <daahern@cisco.com>
>>
>> The rootfs argument allows analysis of perf.data file using a locally
>> accessible filesystem tree with debug symbols - e.g.,  loop mounted
>> KVM disk images, NFS, USB keys, initrds, etc. Anything with an OS tree
>> can be analyzed from anywhere without the need to populate a local
>> data store with build-ids.
> 
> Patch looks sane after quick look, just in doubt if "rootfs" is a good
> name for this, will look if this can be somehow combined with the kvm
> parameters.

I do want to have the ability to analyze a KVM hosted VM using an
external tree as well. e.g., --guestmount points to an sshfs mount and
--rootfs points to a tree with symbols for the stripped image running in
the VM.

I think my followup patch for kallsyms should be able to leverage some
of the guestkallsyms code from KVM.

David

> 
> Anybody else with cycles to think about this?
> 
> - Arnaldo