On 2024/6/27 4:04, Andrew Morton wrote:
On Wed, 26 Jun 2024 16:53:22 +0800 Kefeng Wang <wangkefeng.wang@xxxxxxxxxx> 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.
