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    SubjectRe: [GIT PULL] tracing: Syscalls trace events + perf support
    On Wed, Aug 12, 2009 at 04:29:17PM +0200, Ingo Molnar wrote:
    > * Jason Baron <jbaron@redhat.com> wrote:
    >
    > > On Wed, Aug 12, 2009 at 01:14:36PM +0200, Ingo Molnar wrote:
    >
    > > > another thing: could we please also have a generic, highlevel
    > > > tracepoint (in addition to the specific tracepoints) that
    > > > enumerates the raw syscall Nr and the parameters it gets - in a
    > > > single tracepoint?
    > >
    > > The specific tracepoints, are all layered on 2 (entry, exit)
    > > generic tracepoints already. So this shouldn't be too hard...The
    > > parameters it gets might be tricky, since there are a variable
    > > number b/w different syscalls?
    >
    > We should just list all ~6 of them. It's up to the sampling entity
    > to decide which ones (if any) is relevant.
    >
    > At least on x86 the syscall arguments will always have a value when
    > the syscall entry code is called. (they are in GP registers)
    >
    > Ingo

    ok, makes sense. I'll add to the todo list.

    -Jason




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