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Message-ID: <c423c281f6739b7d847e2375c65ec2a4cf839d01.camel@mediatek.com>
Date: Wed, 8 Jun 2022 10:46:07 +0800
From: Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>
To: Patrick Wang <patrick.wang.shcn@...il.com>,
"catalin.marinas@....com" <catalin.marinas@....com>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
CC: "linux-mm@...ck.org" <linux-mm@...ck.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Yee Lee (李建誼)
<Yee.Lee@...iatek.com>, <kuan-ying.lee@...iatek.com>
Subject: Re: [PATCH v2 0/4] mm: kmemleak: store objects allocated with
physical address separately and check when scan
On Fri, 2022-06-03 at 11:54 +0800, Patrick Wang wrote:
> The kmemleak_*_phys() interface uses "min_low_pfn" and
> "max_low_pfn" to check address. But on some architectures,
> kmemleak_*_phys() is called before those two variables
> initialized. The following steps will be taken:
>
> 1) Add OBJECT_PHYS flag and rbtree for the objects allocated
> with physical address
> 2) Store physical address in objects if allocated with OBJECT_PHYS
> 3) Check the boundary when scan instead of in kmemleak_*_phys()
>
> This patch set will solve:
> https://lore.kernel.org/r/20220527032504.30341-1-yee.lee@mediatek.com
>
https://lore.kernel.org/r/9dd08bb5-f39e-53d8-f88d-bec598a08c93@gmail.com
Hi Patrick,
If this patchset fix the above issue, I think we need to add
the below fixes tag.
Fixes: 23c2d497de21 ("mm: kmemleak: take a full lowmem check in
kmemleak_*_phys()")
Thanks.
>
> v1:
> https://lore.kernel.org/r/20220531150823.1004101-1-patrick.wang.shcn@gmail.com
>
> v1->v2:
> - add rbtree for the objects allocated with physical address
> - store physical address in objects if allocated with OBJECT_PHYS
> - check the upper object boundary as well and avoid duplicate check
>
> Patrick Wang (4):
> mm: kmemleak: add OBJECT_PHYS flag for objects allocated with
> physical
> address
> mm: kmemleak: add rbtree for objects allocated with physical
> address
> mm: kmemleak: handle address stored in object based on its type
> mm: kmemleak: kmemleak_*_phys() set address type and check PA when
> scan
>
> mm/kmemleak.c | 193 ++++++++++++++++++++++++++++++++--------------
> ----
> 1 file changed, 123 insertions(+), 70 deletions(-)
>
> --
> 2.25.1
>
>
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