From: Kefeng Wang <wangkefeng.wang@huawei.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: <linux-mm@kvack.org>, Tony Luck <tony.luck@intel.com>,
Miaohe Lin <linmiaohe@huawei.com>, <nao.horiguchi@gmail.com>,
Matthew Wilcox <willy@infradead.org>,
David Hildenbrand <david@redhat.com>,
Muchun Song <muchun.song@linux.dev>,
Benjamin LaHaise <bcrl@kvack.org>, <jglisse@redhat.com>,
Jiaqi Yan <jiaqiyan@google.com>, Hugh Dickins <hughd@google.com>,
Vishal Moola <vishal.moola@gmail.com>,
Alistair Popple <apopple@nvidia.com>,
Jane Chu <jane.chu@oracle.com>,
Oscar Salvador <osalvador@suse.de>,
Lance Yang <ioworker0@gmail.com>
Subject: Re: [PATCH v5 0/6] mm: migrate: support poison recover from migrate folio
Date: Thu, 27 Jun 2024 09:06:31 +0800 [thread overview]
Message-ID: <99cb1bd4-65bd-4d2e-a51e-b61bdfd5d7ef@huawei.com> (raw)
In-Reply-To: <20240626130427.2124681ea725b306de4d103d@linux-foundation.org>
On 2024/6/27 4:04, Andrew Morton wrote:
> On Wed, 26 Jun 2024 16:53:22 +0800 Kefeng Wang <wangkefeng.wang@huawei.com> wrote:
>
>> The folio migration is widely used in kernel, memory compaction, memory
>> hotplug, soft offline page, numa balance, memory demote/promotion, etc,
>> but once access a poisoned source folio when migrating, the kernel will
>> panic.
>
> Is there some simple fixup which we can prepare for -stable kernels
> which will avoid this panic?
No simple fixup, and also I don't think this is suitable for the
-stable, it should be an enhancement about MC safe copy and as a new
feature, not a bugfix. See other poison recovery(CoW on normal/hugetlb
page, khugepaged/ksm copy), we don't backport them too.
prev parent reply other threads:[~2024-06-27 1:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-26 8:53 Kefeng Wang
2024-06-26 8:53 ` [PATCH v5 1/6] mm: move memory_failure_queue() into copy_mc_[user]_highpage() Kefeng Wang
2024-06-26 8:53 ` [PATCH v5 2/6] mm: add folio_mc_copy() Kefeng Wang
2024-06-26 8:53 ` [PATCH v5 3/6] mm: migrate: split folio_migrate_mapping() Kefeng Wang
2024-06-26 8:53 ` [PATCH v5 4/6] mm: migrate: support poisoned recover from migrate folio Kefeng Wang
2024-06-26 8:53 ` [PATCH v5 5/6] fs: hugetlbfs: support poisoned recover from hugetlbfs_migrate_folio() Kefeng Wang
2024-06-26 8:53 ` [PATCH v5 6/6] mm: migrate: remove folio_migrate_copy() Kefeng Wang
2024-06-26 20:04 ` [PATCH v5 0/6] mm: migrate: support poison recover from migrate folio Andrew Morton
2024-06-27 1:06 ` Kefeng Wang [this message]
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