4.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Jérôme Glisse <[email protected]> commit bfba8e5cf28f413aa05571af493871d74438979f upstream. 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/[email protected] Signed-off-by: Jérôme Glisse <[email protected]> Reported-by: Andrea Arcangeli <[email protected]> Reviewed-by: Zi Yan <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Anshuman Khandual <[email protected]> Cc: Dave Hansen <[email protected]> Cc: David Nellans <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Naoya Horiguchi <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- mm/huge_memory.c | 6 ------ 1 file changed, 6 deletions(-) --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2883,9 +2883,6 @@ 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); @@ -2898,9 +2895,6 @@ 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)
