From: "Luck, Tony" <tony.luck@intel.com>
To: Miaohe Lin <linmiaohe@huawei.com>,
Alexander Potapenko <glider@google.com>
Cc: Matthew Wilcox <willy@infradead.org>,
Shuai Xue <xueshuai@linux.alibaba.com>,
"Williams, Dan J" <dan.j.williams@intel.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
Naoya Horiguchi <naoya.horiguchi@nec.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: RE: [PATCH v3 1/2] mm, hwpoison: Try to recover from copy-on write faults
Date: Fri, 28 Oct 2022 16:09:08 +0000 [thread overview]
Message-ID: <SJ1PR11MB6083F63D86CDF7810F5ACDA3FC329@SJ1PR11MB6083.namprd11.prod.outlook.com> (raw)
In-Reply-To: <a60484bf-2107-8bc4-acdc-5f582f9637af@huawei.com>
>> + vfrom = kmap_local_page(from);
>> + vto = kmap_local_page(to);
>> + ret = copy_mc_to_kernel(vto, vfrom, PAGE_SIZE);
>
> In copy_user_highpage(), kmsan_unpoison_memory(page_address(to), PAGE_SIZE) is done after the copy when
> __HAVE_ARCH_COPY_USER_HIGHPAGE isn't defined. Do we need to do something similar here? But I'm not familiar
> with kmsan, so I can easy be wrong.
It looks like that kmsan_unpoison_memory() call was added recently, after I copied
copy_user_highpage() to create copy_mc_user_highpage(). I'm not familiar with
kmsan either. Adding Alexander to this thread since they added that code.
> Anyway, this patch looks good to me. Thanks.
>
> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Thanks for the review.
-Tony
next prev parent reply other threads:[~2022-10-28 16:15 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-17 23:42 [RFC PATCH] mm, hwpoison: Recover from copy-on-write machine checks Tony Luck
2022-10-18 8:43 ` HORIGUCHI NAOYA(堀口 直也)
2022-10-18 17:52 ` Luck, Tony
2022-10-19 17:08 ` [PATCH v2] mm, hwpoison: Try to recover from copy-on write faults Tony Luck
2022-10-19 17:45 ` Dan Williams
2022-10-19 20:30 ` Luck, Tony
2022-10-20 1:57 ` Shuai Xue
2022-10-20 20:05 ` Tony Luck
2022-10-21 1:38 ` Miaohe Lin
2022-10-21 3:57 ` Luck, Tony
2022-10-21 1:52 ` Shuai Xue
2022-10-21 4:08 ` Tony Luck
2022-10-21 4:11 ` David Laight
2022-10-21 4:41 ` Luck, Tony
2022-10-21 9:29 ` Shuai Xue
2022-10-21 16:30 ` Luck, Tony
2022-10-23 15:04 ` Shuai Xue
2022-10-21 6:57 ` Shuai Xue
2022-10-21 20:01 ` [PATCH v3 0/2] Copy-on-write poison recovery Tony Luck
2022-10-21 20:01 ` [PATCH v3 1/2] mm, hwpoison: Try to recover from copy-on write faults Tony Luck
2022-10-25 5:46 ` HORIGUCHI NAOYA(堀口 直也)
2022-10-28 2:11 ` Miaohe Lin
2022-10-28 16:09 ` Luck, Tony [this message]
2022-11-02 14:27 ` Alexander Potapenko
2022-11-02 14:30 ` Alexander Potapenko
2022-10-21 20:01 ` [PATCH v3 2/2] mm, hwpoison: When copy-on-write hits poison, take page offline Tony Luck
2022-10-28 2:28 ` Miaohe Lin
2022-10-28 16:13 ` Luck, Tony
2022-10-29 1:55 ` Miaohe Lin
2022-10-23 15:52 ` [PATCH v3 0/2] Copy-on-write poison recovery Shuai Xue
2022-10-26 5:19 ` Shuai Xue
2022-10-31 20:10 ` [PATCH v4 " Tony Luck
2022-10-31 20:10 ` [PATCH v4 1/2] mm, hwpoison: Try to recover from copy-on write faults Tony Luck
2022-10-31 20:10 ` [PATCH v4 2/2] mm, hwpoison: When copy-on-write hits poison, take page offline Tony Luck
2023-05-18 21:49 ` Jane Chu
2023-05-18 22:10 ` Luck, Tony
2023-05-19 7:28 ` Greg Kroah-Hartman
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