linux-kernel - Re: [patch 12/12] mm: correctly synchronize rss-counters at exit/exec

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Message-ID: <CA+55aFw7y5FBJm6pxiHHsoiPaVQG3A+4u6J9=4DGd8kVPjmzGQ@mail.gmail.com>
Date:	Thu, 7 Jun 2012 18:19:57 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	akpm@...ux-foundation.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, khlebnikov@...nvz.org,
	kamezawa.hiroyu@...fujitsu.com, markus@...ppelsdorf.de,
	oleg@...hat.com, stable@...r.kernel.org
Subject: Re: [patch 12/12] mm: correctly synchronize rss-counters at exit/exec

No, this is apparently that same "almost there" patch from Oleg. I
guarantee that it's wrong.

                Linus

---

[ This part, to be exact: ]

On Thu, Jun 7, 2012 at 6:16 PM, Hugh Dickins <hughd@...gle.com> wrote:
> --- a/kernel/tsacct.c
> +++ b/kernel/tsacct.c
> @@ -91,6 +91,7 @@ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
>        stats->virtmem = p->acct_vm_mem1 * PAGE_SIZE / MB;
>        mm = get_task_mm(p);
>        if (mm) {
> +               sync_mm_rss(mm);
>                /* adjust to KB unit */
>                stats->hiwater_rss   = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
>                stats->hiwater_vm    = get_mm_hiwater_vm(mm)  * PAGE_SIZE / KB;
> --
> 1.5.5.1
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