From: Jue Wang <juew@google.com>
To: tony.luck@intel.com
Cc: akpm@linux-foundation.org, bp@alien8.de, david@redhat.com,
hpa@zytor.com, linux-edac@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
mingo@redhat.com, naoya.horiguchi@nec.com, osalvador@suse.de,
tglx@linutronix.de, x86@kernel.org, yangfeng1@kingsoft.com,
yaoaili@kingsoft.com
Subject: Re: [PATCH v2] mm,hwpoison: return -EBUSY when page already poisoned
Date: Fri, 12 Mar 2021 17:55:31 -0800 [thread overview]
Message-ID: <20210313015531.1737679-1-juew@google.com> (raw)
In-Reply-To: <20210309200140.GA237657@agluck-desk2.amr.corp.intel.com>
I believe the mutex type patch has its own value in protecting
memory_failure from other inherent races, e.g., races around
split_huge_page where concurrent MCE happens to different 4k pages
under the same THP.[1] This realistically can happen given the physical
locality clustering effect of memory errors.
Thanks,
-Jue
[1] The split fails due to a page reference taken by other concurrent
calling into memory_failure on the same THP.
next prev parent reply other threads:[~2021-03-13 1:56 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210224151619.67c29731@alex-virtual-machine>
[not found] ` <20210224103105.GA16368@linux>
[not found] ` <20210225114329.4e1a41c6@alex-virtual-machine>
[not found] ` <20210225112818.GA10141@hori.linux.bs1.fc.nec.co.jp>
[not found] ` <20210225113930.GA7227@localhost.localdomain>
[not found] ` <20210225123806.GA15006@hori.linux.bs1.fc.nec.co.jp>
[not found] ` <20210225181542.GA178925@agluck-desk2.amr.corp.intel.com>
[not found] ` <20210226021907.GA27861@hori.linux.bs1.fc.nec.co.jp>
2021-02-26 2:59 ` [PATCH] mm,hwpoison: return -EBUSY when page already poisoned Aili Yao
2021-03-03 3:39 ` Luck, Tony
2021-03-03 3:57 ` Aili Yao
2021-03-03 8:39 ` Aili Yao
2021-03-03 15:41 ` Luck, Tony
2021-03-04 2:16 ` Aili Yao
2021-03-04 4:19 ` Aili Yao
2021-03-04 6:45 ` Aili Yao
2021-03-04 23:57 ` Luck, Tony
2021-03-05 1:30 ` Aili Yao
2021-03-05 1:36 ` Aili Yao
2021-03-05 22:11 ` Luck, Tony
2021-03-08 6:45 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-08 18:54 ` Luck, Tony
2021-03-08 22:38 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-08 22:55 ` [PATCH] mm/memory-failure: Use a mutex to avoid memory_failure() races Luck, Tony
2021-03-08 23:42 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-09 2:04 ` Aili Yao
2021-03-09 6:04 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-09 6:35 ` [PATCH v2] mm,hwpoison: return -EBUSY when page already poisoned Aili Yao
2021-03-09 8:28 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-09 20:01 ` Luck, Tony
2021-03-10 8:05 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-13 1:55 ` Jue Wang [this message]
2021-03-10 8:01 ` Aili Yao
2021-03-09 6:38 ` [PATCH] mm/memory-failure: Use a mutex to avoid memory_failure() races Aili Yao
2021-03-05 15:55 ` [PATCH] mm,hwpoison: return -EBUSY when page already poisoned Luck, Tony
2021-03-10 6:10 ` Aili Yao
2021-03-11 8:55 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-11 11:23 ` Aili Yao
2021-03-11 17:05 ` Luck, Tony
2021-03-12 5:55 ` Aili Yao
2021-03-12 16:29 ` Luck, Tony
2021-03-12 23:48 ` Luck, Tony
2021-03-16 6:42 ` HORIGUCHI NAOYA(堀口 直也)
2021-03-16 7:54 ` Aili Yao
2021-03-17 0:29 ` Luck, Tony
2021-03-17 9:07 ` Aili Yao
2021-03-17 7:48 ` Aili Yao
2021-03-17 8:23 ` Aili Yao
[not found] ` <20210226105250.3a15e35c@alex-virtual-machine>
2021-02-26 17:58 ` Luck, Tony
2021-03-02 4:32 ` Aili Yao
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