Em Mon, Jun 23, 2014 at 03:41:39PM +0400, Stanislav Fomichev escreveu:
> > > But we then need to predefine many probes for decoding to work in the
> > > form of
> > > func:offset, and then play catch-up with all the kernel changes.
> > > Or I miss something important here?
> > No you don't.
> >
Hi Arnaldo and Stanislav,
On Fri, 20 Jun 2014 10:21:05 -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Jun 20, 2014 at 02:49:42PM +0400, Stanislav Fomichev escreveu:
>> This patch series adds support for pagefaults tracing to 'perf trace'
>> command.
>> It seems this feature was planned by Namhy
On 6/20/14, 9:24 AM, Arnaldo Carvalho de Melo wrote:
Right now it is too simple, but I was starting to work (when you jumped
right in with your work making me stop and go on testing/reviewing :) )
on making it more generic so that we could defer pretty printing the
arguments from sys_enter to sys
> > But we then need to predefine many probes for decoding to work in the form
> > of
> > func:offset, and then play catch-up with all the kernel changes.
> > Or I miss something important here?
>
> No you don't.
>
> If we want to disturb the system in the least way possible, we need to
> tag al
Em Fri, Jun 20, 2014 at 08:18:59PM +0400, Stanislav Fomichev escreveu:
> > Hey, haven't you seen the vfs_getname probe? Idea is to hook on where
> > the relevant copy_from_user is done and insert that into the ring
> > buffer, as we already do for mapping fd -> pathname.
> I saw it but didn't actu
> Hey, haven't you seen the vfs_getname probe? Idea is to hook on where
> the relevant copy_from_user is done and insert that into the ring
> buffer, as we already do for mapping fd -> pathname.
I saw it but didn't actually try because it needs all the debugging
stuff enabled and in place.
> I.e.
Em Fri, Jun 20, 2014 at 07:03:18PM +0400, Stanislav Fomichev escreveu:
> > Just to clarify here, those slides came from slides I made and in turn
> > the whole idea about pagefaults tracing I got from the trace prototype
> > that Thomas Gleixner implemented in his 'trace' utility, described
> > he
> Just to clarify here, those slides came from slides I made and in turn
> the whole idea about pagefaults tracing I got from the trace prototype
> that Thomas Gleixner implemented in his 'trace' utility, described
> here:
>
> Announcing a new utility: 'trace'
> http://lwn.net/Articles/415728
Em Fri, Jun 20, 2014 at 02:49:42PM +0400, Stanislav Fomichev escreveu:
> This patch series adds support for pagefaults tracing to 'perf trace' command.
> It seems this feature was planned by Namhyung Kim
> (http://events.linuxfoundation.org/images/stories/pdf/klf2012_n_kim.pdf page
> 17/28)
> but
This patch series adds support for pagefaults tracing to 'perf trace' command.
It seems this feature was planned by Namhyung Kim
(http://events.linuxfoundation.org/images/stories/pdf/klf2012_n_kim.pdf page
17/28)
but I couldn't find any prior patches/discussion and started from scratch.
First th
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