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    SubjectRe: [PATCHSET ptrace] ptrace: implement PTRACE_SEIZE/INTERRUPT and group stop notification, take#2
    On Thursday 19 May 2011 17:04, Linus Torvalds wrote:
    > On Mon, May 16, 2011 at 11:17 AM, Tejun Heo <> wrote:
    > >
    > > This is the second try at implementing PTRACE_SEIZE/INTERRUPT and
    > > group stop notification.  Notable changes from the first take[1] are,
    > >
    > > * Prep patches moved to a separate patchset[2].
    > So having followed the discussion so far, quite frankly I'm not
    > convinced this series is 2.6.40 material.
    > I think that conceptually the split-up of PTRACE_ATTACH into
    > SEIZE/INTERRUPT might be fine, but I don't think the interface is
    > necessarily cooked, and perhaps more importantly I'm not at all sure
    > that the (few) current users of ptrace() would even switch over.

    I will push strace to at least use what we already have (TRACESYSGOOD etc).

    > So I think Oleg's branch with cleanups is probably ready, and maybe a
    > few of the preparatory patches from this branch can be merged, but I
    > would _strongly_ suggest that the plan for 2.6.40 should be to not
    > actually mess with interfaces to the kernel, but just cleaning up the
    > actual internal implementation. I would like to keep 2.6.40 small and
    > simple.

    strace wasn't handling ^Z correctly for many years. It definitely can wait
    for another kernel release cycle.

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