From: Vlastimil Babka <vbabka@suse.cz>
To: Walter Wu <walter-zh.wu@mediatek.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Will Deacon <will@kernel.org>,
Andrey Konovalov <andreyknvl@google.com>,
Arnd Bergmann <arnd@arndb.de>,
Thomas Gleixner <tglx@linutronix.de>,
Michal Hocko <mhocko@kernel.org>, Qian Cai <cai@lca.pw>
Cc: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com
Subject: Re: [PATCH v2 1/2] mm/page_ext: support to record the last stack of page
Date: Mon, 9 Sep 2019 14:59:12 +0200 [thread overview]
Message-ID: <0fd84c7b-a23b-0b09-519f-a006fade1b4f@suse.cz> (raw)
In-Reply-To: <20190909085339.25350-1-walter-zh.wu@mediatek.com>
On 9/9/19 10:53 AM, Walter Wu wrote:
> KASAN will record last stack of page in order to help programmer
> to see memory corruption caused by page.
>
> What is difference between page_owner and our patch?
> page_owner records alloc stack of page, but our patch is to record
> last stack(it may be alloc or free stack of page).
>
> Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com>
There's no point in separating this from patch 2 (and as David pointed
out, doesn't compile).
> ---
> mm/page_ext.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/mm/page_ext.c b/mm/page_ext.c
> index 5f5769c7db3b..7ca33dcd9ffa 100644
> --- a/mm/page_ext.c
> +++ b/mm/page_ext.c
> @@ -65,6 +65,9 @@ static struct page_ext_operations *page_ext_ops[] = {
> #if defined(CONFIG_IDLE_PAGE_TRACKING) && !defined(CONFIG_64BIT)
> &page_idle_ops,
> #endif
> +#ifdef CONFIG_KASAN
> + &page_stack_ops,
> +#endif
> };
>
> static unsigned long total_usage;
>
prev parent reply other threads:[~2019-09-09 12:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-09 8:53 [PATCH v2 1/2] mm/page_ext: support to record the last stack of page Walter Wu
2019-09-09 10:57 ` David Hildenbrand
2019-09-10 1:07 ` Walter Wu
2019-09-10 9:31 ` Kirill A. Shutemov
2019-09-10 9:43 ` Walter Wu
2019-09-09 12:59 ` Vlastimil Babka [this message]
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