From: Daniel Jacobowitz <dan@debian.org>
To: "Davda, Bhavesh P (Bhavesh)" <bhavesh@avaya.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] New SA_NOPRNOTIF sigaction flag
Date: Wed, 28 Sep 2005 14:33:22 -0400 [thread overview]
Message-ID: <20050928183322.GA15021@nevyn.them.org> (raw)
In-Reply-To: <21FFE0795C0F654FAD783094A9AE1DFC086F02D1@cof110avexu4.global.avaya.com>
On Wed, Sep 28, 2005 at 12:06:21PM -0600, Davda, Bhavesh P (Bhavesh) wrote:
> > Yes, I entirely understand what you're saying. I feel like you're not
> > reading my responses. GDB _already has a list of signals it does not
> > care about_. If ptrace permitted, it could tell the kernel not to
> > context switch to deliver those signals. In advance! That's a
> > debugger-driven solution to your problem.
> >
> > I'm not arguing out of theory here. I've implemented this mechanism
> > before in other contexts, for instance to prevent the remote protocol
> > overhead for ignored signals when using gdb with gdbserver.
> >
>
>
> Okay, I'll come up with an alternative patch that enhances the ptrace
> interface so the debugger can guide the kernel to NOT context switch and
> bother it about signal x from task y.
>
> Would you be amenable to such a patch?
Yes, definitely. I just hadn't found a chance to think about what the
interface should look like.
[For the record, I'm pretty sure that the Solaris procfs debug
interface offers a similar feature.]
--
Daniel Jacobowitz
CodeSourcery, LLC
next prev parent reply other threads:[~2005-09-28 18:33 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-28 18:06 [RFC PATCH] New SA_NOPRNOTIF sigaction flag Davda, Bhavesh P (Bhavesh)
2005-09-28 18:33 ` Daniel Jacobowitz [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-10-03 15:21 Davda, Bhavesh P (Bhavesh)
2005-10-03 16:12 ` Daniel Jacobowitz
2005-09-28 19:11 Davda, Bhavesh P (Bhavesh)
2005-10-03 0:27 ` Daniel Jacobowitz
2005-09-27 21:55 Davda, Bhavesh P (Bhavesh)
2005-09-28 14:10 ` Daniel Jacobowitz
2005-09-27 16:24 Davda, Bhavesh P (Bhavesh)
2005-09-27 20:39 ` Daniel Jacobowitz
2005-09-27 14:45 Davda, Bhavesh P (Bhavesh)
2005-09-27 15:55 ` Daniel Jacobowitz
2005-09-27 23:26 ` Valdis.Kletnieks
2005-09-26 17:39 Bhavesh P. Davda
2005-09-27 13:06 ` Daniel Jacobowitz
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