linux-kernel - Re: [RFC, PATCH 0/2] utrace/ptrace: simplify/cleanup ptrace attach

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Message-Id: <20090504194348.BC0EBFC32F@magilla.sf.frob.com>
Date:	Mon,  4 May 2009 12:43:48 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Jeff Dike <jdike@...toit.com>, utrace-devel@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC, PATCH 0/2] utrace/ptrace: simplify/cleanup ptrace attach

> The second patch "ptrace: do not use task_lock() for attach" has nothing
> to do with utrace, and it is really pure ptrace cleanup.

Indeed.

> But it can't be applied to -mm tree, because it (textually) conficts with
> utrace changes in ptrace_attach().

Oh, -mm.  I had not thought about the -mm patch merge order.  I just look
at the whole ptrace-related series from you as an independent series on top
of Linus -current, preceding anything else related.

> > When those are on their way,
> > we'll update the utrace patches not to conflict.  I don't think it makes
> > sense to include utrace.patch's little ptrace.c change in the baseline tree
> > for your ptrace cleanup patches.
> 
> Yes, but in this case, how can we push it before utrace-core.patch ?
> 
> The first patch is only for -mm, to avoid the painful dependencies.

I guess we should take Andrew's advice on this.  To me, it makes most sense
just to order the -mm patches so utrace comes later, and replace the utrace
patch as necessary with a compatible version.  Perhaps things would be
simpler if we made a separate standalone series or git tree (tip/ptrace?)
for ptrace cleanups.


Thanks,
Roland
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