The patch titled
Subject: revert "mm: align larger anonymous mappings on THP boundaries"
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
revert-mm-align-larger-anonymous-mappings-on-thp-boundaries.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/revert-mm-align-larger-anonymous-mappings-on-thp-boundaries.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: revert "mm: align larger anonymous mappings on THP boundaries"
Date: Thu Dec 1 01:22:56 PM PST 2022
Several testers are seeing large slowdowns from this commit. The reasons
for this are unclear. Revert it from 6.1-rcX so this can be better
examined.
Fixes: f35b5d7d676e ("mm: align larger anonymous mappings on THP boundaries")
Reported-by: kernel test robot <yujie.liu@xxxxxxxxx>
Reported-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Reported-by: Thorsten Leemhuis <regressions@xxxxxxxxxxxxx>
Cc: Feng Tang <feng.tang@xxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Xing Zhengjun <zhengjun.xing@xxxxxxxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Cc: "Yin, Fengwei" <fengwei.yin@xxxxxxxxx>
Cc: Yujie Liu <yujie.liu@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 3 ---
1 file changed, 3 deletions(-)
--- a/mm/mmap.c~revert-mm-align-larger-anonymous-mappings-on-thp-boundaries
+++ a/mm/mmap.c
@@ -1779,9 +1779,6 @@ get_unmapped_area(struct file *file, uns
*/
pgoff = 0;
get_area = shmem_get_unmapped_area;
- } else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) {
- /* Ensures that larger anonymous mappings are THP aligned. */
- get_area = thp_get_unmapped_area;
}
addr = get_area(file, addr, len, pgoff, flags);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
revert-mm-align-larger-anonymous-mappings-on-thp-boundaries.patch
mm-gup-remove-foll_migration-fix.patch
mm-memremap_pages-replace-zone_device_page_init-with-pgmap_request_folios-fix.patch
mm-memremap-introduce-pgmap_request_folio-using-pgmap-offsets-fix.patch
mm-memremap-introduce-pgmap_request_folio-using-pgmap-offsets-fix-2.patch
