The patch titled
Subject: mm-thp-fix-madv_dontneed-vs-migrate_misplaced_transhuge_page-race-condition-fix
has been removed from the -mm tree. Its filename was
mm-thp-fix-madv_dontneed-vs-migrate_misplaced_transhuge_page-race-condition-fix.patch
This patch was dropped because it was folded into mm-thp-fix-madv_dontneed-vs-migrate_misplaced_transhuge_page-race-condition.patch
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-thp-fix-madv_dontneed-vs-migrate_misplaced_transhuge_page-race-condition-fix
reflow comment to 80 cols, fix grammar and typo (beacuse)
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/migrate.c~mm-thp-fix-madv_dontneed-vs-migrate_misplaced_transhuge_page-race-condition-fix
+++ a/mm/migrate.c
@@ -2041,16 +2041,15 @@ int migrate_misplaced_transhuge_page(str
flush_cache_range(vma, mmun_start, mmun_end);
page_add_anon_rmap(new_page, vma, mmun_start, true);
/*
- * At this point the pmd is numa/protnone (i.e. non present)
- * and the TLB has already been flushed globally. So no TLB
- * can be currently caching this non present pmd mapping.
- * There's no need of clearing the pmd before doing
- * set_pmd_at(), nor to flush the TLB after
- * set_pmd_at(). Clearing the pmd here would introduce a race
- * condition against MADV_DONTNEED, beacuse MADV_DONTNEED only
- * holds the mmap_sem for reading. If the pmd is set to NULL
- * at any given time, MADV_DONTNEED won't wait on the pmd lock
- * and it'll skip clearing this pmd.
+ * At this point the pmd is numa/protnone (i.e. non present) and the TLB
+ * has already been flushed globally. So no TLB can be currently
+ * caching this non present pmd mapping. There's no need to clear the
+ * pmd before doing set_pmd_at(), nor to flush the TLB after
+ * set_pmd_at(). Clearing the pmd here would introduce a race
+ * condition against MADV_DONTNEED, because MADV_DONTNEED only holds the
+ * mmap_sem for reading. If the pmd is set to NULL at any given time,
+ * MADV_DONTNEED won't wait on the pmd lock and it'll skip clearing this
+ * pmd.
*/
set_pmd_at(mm, mmun_start, pmd, entry);
update_mmu_cache_pmd(vma, address, &entry);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mm-thp-fix-madv_dontneed-vs-migrate_misplaced_transhuge_page-race-condition.patch
