From: Andi Kleen <andi@firstfloor.org>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "David Hildenbrand (Arm)" <david@kernel.org>,
linux-kernel@vger.kernel.org, Miaohe Lin <linmiaohe@huawei.com>,
Naoya Horiguchi <nao.horiguchi@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Oscar Salvador <osalvador@suse.de>,
Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>,
Rik van Riel <riel@redhat.com>,
Vlastimil Babka <vbabka@kernel.org>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>,
Brendan Jackman <jackmanb@google.com>,
Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Nico Pache <npache@redhat.com>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>,
Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Harry Yoo <harry@kernel.org>, Hao Li <hao.li@linux.dev>,
Kiryl Shutsemau <kas@kernel.org>,
Byungchul Park <byungchul@sk.com>,
linux-mm@kvack.org, linux-cxl@vger.kernel.org
Subject: Re: [PATCH 0/2] mm: memory-failure: fix HWPoison flag race with non-atomic page flag ops
Date: Mon, 29 Jun 2026 14:39:44 -0700 [thread overview]
Message-ID: <akLmILr-cbl8Eqq-@firstfloor.org> (raw)
In-Reply-To: <20260629171727-mutt-send-email-mst@kernel.org>
> We can maybe batch a bunch of these, and do stop machine once?
If you add a long delay you increase the risk that the machine or
the critical process dies because there is an unrecoverable or
process killing AR access before the page can be off lined.
(BTW that's a problem even with the RCU approach, the cure might be
worse than the disease)
If you don't add a long delay you would do a lot of stop machines
on a flood, likely bringing it to a halt, even though other sockets etc.
might still be fine.
-Andi
next prev parent reply other threads:[~2026-06-29 21:39 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-28 21:45 [PATCH 0/2] mm: memory-failure: fix HWPoison flag race with non-atomic page flag ops Michael S. Tsirkin
2026-06-28 21:45 ` [PATCH 1/2] mm: memory-failure: use RCU to fix HWPoison flag race Michael S. Tsirkin
2026-06-28 21:45 ` [PATCH 2/2] mm: wrap non-atomic page flag ops in RCU for HWPoison safety Michael S. Tsirkin
2026-06-29 2:11 ` [PATCH 0/2] mm: memory-failure: fix HWPoison flag race with non-atomic page flag ops Andi Kleen
2026-06-29 8:10 ` Michael S. Tsirkin
2026-06-29 8:21 ` David Hildenbrand (Arm)
2026-06-29 8:39 ` Michael S. Tsirkin
2026-06-29 16:54 ` Andi Kleen
2026-06-29 17:04 ` David Hildenbrand (Arm)
2026-06-29 20:43 ` Michael S. Tsirkin
2026-06-29 6:49 ` David Hildenbrand (Arm)
2026-06-29 7:34 ` Michael S. Tsirkin
2026-06-29 13:05 ` David Hildenbrand (Arm)
2026-06-29 20:08 ` Michael S. Tsirkin
2026-06-29 20:55 ` Andi Kleen
2026-06-29 21:17 ` Michael S. Tsirkin
2026-06-29 21:39 ` Andi Kleen [this message]
2026-06-29 21:59 ` Michael S. Tsirkin
2026-06-29 21:22 ` David Hildenbrand (Arm)
2026-06-29 21:43 ` David Hildenbrand (Arm)
2026-06-29 23:34 ` Michael S. Tsirkin
2026-06-29 21:50 ` Michael S. Tsirkin
2026-06-29 21:54 ` Michael S. Tsirkin
2026-06-29 23:29 ` Michael S. Tsirkin
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