+ mm-thp-fix-call-to-mmu_notifier-in-set_pmd_migration_entry-v2.patch added to -mm tree

The patch titled
     Subject: mm/thp: fix call to mmu_notifier in set_pmd_migration_entry() v2
has been added to the -mm tree.  Its filename is
     mm-thp-fix-call-to-mmu_notifier-in-set_pmd_migration_entry-v2.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-thp-fix-call-to-mmu_notifier-in-set_pmd_migration_entry-v2.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-thp-fix-call-to-mmu_notifier-in-set_pmd_migration_entry-v2.patch

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------------------------------------------------------
From: Jérôme Glisse <redacted>
Subject: mm/thp: fix call to mmu_notifier in set_pmd_migration_entry() v2

Inside set_pmd_migration_entry() we are holding page table locks and thus
we can not sleep so we can not call invalidate_range_start/end()

So remove call to mmu_notifier_invalidate_range_start/end() because they
are call inside the function calling set_pmd_migration_entry() (see
try_to_unmap_one()).

Link: http://lkml.kernel.org/r/20181012181056.7864-1-jglisse@redhat.com
Signed-off-by: Jérôme Glisse <redacted>
Reported-by: Andrea Arcangeli <redacted>
Reviewed-by: Zi Yan <redacted>
Acked-by: Michal Hocko <mhocko@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Kirill A. Shutemov <redacted>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Anshuman Khandual <redacted>
Cc: Dave Hansen <redacted>
Cc: David Nellans <redacted>
Cc: Ingo Molnar <redacted>
Cc: Mel Gorman <redacted>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Naoya Horiguchi <redacted>
Cc: Thomas Gleixner <redacted>
Cc: Vlastimil Babka <redacted>
Cc: <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

--- a/mm/huge_memory.c~mm-thp-fix-call-to-mmu_notifier-in-set_pmd_migration_entry-v2
+++ a/mm/huge_memory.c

@@ -2885,9 +2885,6 @@ void set_pmd_migration_entry(struct page
 	if (!(pvmw->pmd && !pvmw->pte))
 		return;
 
-	mmu_notifier_invalidate_range_start(mm, address,
-			address + HPAGE_PMD_SIZE);
-
 	flush_cache_range(vma, address, address + HPAGE_PMD_SIZE);
 	pmdval = *pvmw->pmd;
 	pmdp_invalidate(vma, address, pvmw->pmd);

@@ -2900,9 +2897,6 @@ void set_pmd_migration_entry(struct page
 	set_pmd_at(mm, address, pvmw->pmd, pmdswp);
 	page_remove_rmap(page, true);
 	put_page(page);
-
-	mmu_notifier_invalidate_range_end(mm, address,
-			address + HPAGE_PMD_SIZE);
 }
 
 void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)

_

Patches currently in -mm which might be from jglisse@redhat.com are

mm-thp-fix-call-to-mmu_notifier-in-set_pmd_migration_entry-v2.patch