linux-kernel - Re: [PATCH 2.6.20-rc1 00/10] Kernel memory leak detector 0.13

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Date:	Wed, 27 Dec 2006 17:02:52 +0000
From:	"Catalin Marinas" <catalin.marinas@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.20-rc1 00/10] Kernel memory leak detector 0.13

On 27/12/06, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Catalin Marinas <catalin.marinas@...il.com> wrote:
>
> > On 17/12/06, Ingo Molnar <mingo@...e.hu> wrote:
> > >it would be nice to record 1) the jiffies value at the time of
> > >allocation, 2) the PID and the comm of the task that did the allocation.
> > >The jiffies timestamp would be useful to see the age of the allocation,
> > >and the PID/comm is useful for context.
> >
> > Trying to copy the comm with get_task_comm, I get the lockdep report
> > below, caused by acquiring the task's alloc_lock. Any idea how to go
> > around this?
>
> just memcpy p->comm without any locking. It's for the current task,
> right? That does not need any locking.

Yes, it is for the current task. I also added an in_interrupt() test
since the current->comm is not relevant in this case as Arjan pointed
out.

-- 
Catalin
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