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Date: Fri, 22 Jul 2011 16:59:34 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: Tejun Heo <tj@kernel.org>
Cc: Denys Vlasenko <vda.linux@googlemail.com>,
        Jan Kratochvil <jan.kratochvil@redhat.com>,
        lkml <linux-kernel@vger.kernel.org>
Subject: Re: Merging ptrace branch into mainline
Message-ID: <20110722145934.GB7408@redhat.com>
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On 07/22, Tejun Heo wrote:
>
> Single step and breakpoints use SIGTRAP and there are some variances
> on the information being reported depending on archs and IIRC it isn't
> always possible to discern those debug traps from kill(SIGTRAP)'s from
> userland.

Yes, we should audit the arch/ code.

On x86 the tracer can discern step/breakpoints traps afaics, still probably
it makes sense to change do_int3() to use fill_sigtrap_info(). Currently we
report si_code = SI_KERNEL.

Oleg.