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Re: [PATCH v2 2.6.38-rc8-tip 11/20] 11: uprobes: slot allocation for uprobes
- From: Stephen Wilson <wilsons at start dot ca>
- To: Srikar Dronamraju <srikar at linux dot vnet dot ibm dot com>
- Cc: Peter Zijlstra <peterz at infradead dot org>, Ingo Molnar <mingo at elte dot hu>, Steven Rostedt <rostedt at goodmis dot org>, Linux-mm <linux-mm at kvack dot org>, Arnaldo Carvalho de Melo <acme at infradead dot org>, Linus Torvalds <torvalds at linux-foundation dot org>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Christoph Hellwig <hch at infradead dot org>, Andi Kleen <andi at firstfloor dot org>, Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>, Oleg Nesterov <oleg at redhat dot com>, LKML <linux-kernel at vger dot kernel dot org>, Jim Keniston <jkenisto at linux dot vnet dot ibm dot com>, Roland McGrath <roland at hack dot frob dot com>, SystemTap <systemtap at sources dot redhat dot com>, Andrew Morton <akpm at linux-foundation dot org>, "Paul E. McKenney" <paulmck at linux dot vnet dot ibm dot com>
- Date: Tue, 15 Mar 2011 16:31:17 -0400
- Subject: Re: [PATCH v2 2.6.38-rc8-tip 11/20] 11: uprobes: slot allocation for uprobes
- References: <20110314133403.27435.7901.sendpatchset@localhost6.localdomain6> <20110314133610.27435.93666.sendpatchset@localhost6.localdomain6>
On Mon, Mar 14, 2011 at 07:06:10PM +0530, Srikar Dronamraju wrote:
> diff --git a/kernel/fork.c b/kernel/fork.c
> index de3d10a..0afa0cd 100644
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -551,6 +551,7 @@ void mmput(struct mm_struct *mm)
> might_sleep();
>
> if (atomic_dec_and_test(&mm->mm_users)) {
> + uprobes_free_xol_area(mm);
> exit_aio(mm);
> ksm_exit(mm);
> khugepaged_exit(mm); /* must run before exit_mmap */
> @@ -677,6 +678,9 @@ struct mm_struct *dup_mm(struct task_struct *tsk)
> memcpy(mm, oldmm, sizeof(*mm));
>
> /* Initializing for Swap token stuff */
> +#ifdef CONFIG_UPROBES
> + mm->uprobes_xol_area = NULL;
> +#endif
> mm->token_priority = 0;
> mm->last_interval = 0;
Perhaps move the uprobes_xol_area initialization away from that comment?
A few lines down beside the hugepage #ifdef would read a bit better.
--
steve