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Date: Fri, 26 Mar 2010 14:47:09 +0100
From: Oleg Nesterov <oleg@redhat.com>
To: Grzegorz Nosek <root@localdomain.pl>
Cc: Matt Helsley <matthltc@us.ibm.com>, Roland McGrath <roland@redhat.com>,
       Sukadev Bhattiprolu <sukadev@us.ibm.com>,
       containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: Testing lxc 0.6.5 in Fedora 13
Message-ID: <20100326134709.GB15790@redhat.com>
References: <20100321195044.GA23757@megiteam.pl> <20100323212834.GH20796@count0.beaverton.ibm.com> <20100325213356.GB20541@megiteam.pl> <20100326111131.GA8604@redhat.com> <20100326115357.GA3345@count0.beaverton.ibm.com> <20100326124522.GD17113@megiteam.pl>
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On 03/26, Grzegorz Nosek wrote:
>
> Hmm, is there a good reason why strace does not use the data explicitly
> provided by the kernel but instead second-guesses it from syscall return
> values? I don't know anything about ptrace, really,

I know almost nothing too. But _iirc_, this all is even worse, strace
doesn't necessary gets the notification from do_fork(), at least
another quick grep shows it doesn't use PTRACE_O_TRACEFORK.

This is another reason why the change in do_fork() can't really help
right now.

Oleg.