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Subject: Re: [RFC] [PATCH 2.6.37-rc5-tip 8/20]  8: uprobes: mmap and fork
 hooks.
From: Peter Zijlstra <peterz@infradead.org>
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Date: Wed, 26 Jan 2011 16:16:49 +0100
Message-ID: <1296055009.28776.1202.camel@laptop>
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Sender: owner-linux-mm@kvack.org
To: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>, Linux-mm <linux-mm@kvack.org>, Arnaldo Carvalho de Melo <acme@infradead.org>, Linus Torvalds <torvalds@linux-foundation.org>, Ananth N Mavinakayanahalli <ananth@in.ibm.com>, Christoph Hellwig <hch@infradead.org>, Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>, Oleg Nesterov <oleg@redhat.com>, LKML <linux-kernel@vger.kernel.org>, SystemTap <systemtap@sources.redhat.com>, Jim Keniston <jkenisto@linux.vnet.ibm.com>, Frederic Weisbecker <fweisbec@gmail.com>, Andi Kleen <andi@firstfloor.org>, Andrew Morton <akpm@linux-foundation.org>, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
List-ID: <linux-mm.kvack.org>

On Wed, 2011-01-26 at 20:29 +0530, Srikar Dronamraju wrote:
> list_for_each_entry_safe(mm, tmpmm, &tmp_list, uprobes_list) {
>                 down_read(&mm->map_sem);
>                 if (!install_uprobe(mm, uprobe))
>                         ret =3D 0;
>                 up_read(&mm->map_sem);
>                 list_del(&mm->uprobes_list);
>                 mmput(mm);
> }=20

and the tmp_list thing works because new mm's will hit the mmap callback
and you cannot loose mm's due to the refcount, right?


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