Thanks David/Zi Yan,
On 2/27/2024 9:45 PM, Zi Yan wrote:
So likely we'd have to fix the stable kernels:
4.19 5.4 5.10 5.15 6.1
That's a lot of pre-folio code. A backport of my series likely won't really make any sense.
So, I assume this is a consensus to have stable-only fix for this issue.
For v6.1, the fix would like below?
diff --git a/mm/migrate.c b/mm/migrate.c index c93dd6a31c31..c5968021fde0 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -423,8 +423,12 @@ int folio_migrate_mapping(struct address_space *mapping, if (folio_test_swapbacked(folio)) { __folio_set_swapbacked(newfolio); if (folio_test_swapcache(folio)) {
int i;folio_set_swapcache(newfolio);
newfolio->private = folio_get_private(folio);
for (i = 0; i < nr; i++)set_page_private(folio_page(newfolio, i),page_private(folio_page(folio, i))); } entries = nr; } else {
Similar to this is what we had tested[1] internally and observed no issues.
Can this be taken to 6.1, please?
[1]https://lore.kernel.org/linux-mm/8620c1a0-e091-46e9-418a-db66e621b9c4@quicin...
Thanks, Charan