4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Jérôme Glisse <jgli...@redhat.com> 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/20181012181056.7864-1-jgli...@redhat.com Signed-off-by: Jérôme Glisse <jgli...@redhat.com> Reported-by: Andrea Arcangeli <aarca...@redhat.com> Reviewed-by: Zi Yan <zi....@cs.rutgers.edu> Acked-by: Michal Hocko <mho...@kernel.org> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> Cc: Kirill A. Shutemov <kirill.shute...@linux.intel.com> Cc: "H. Peter Anvin" <h...@zytor.com> Cc: Anshuman Khandual <khand...@linux.vnet.ibm.com> Cc: Dave Hansen <dave.han...@intel.com> Cc: David Nellans <dnell...@nvidia.com> Cc: Ingo Molnar <mi...@elte.hu> Cc: Mel Gorman <mgor...@techsingularity.net> Cc: Minchan Kim <minc...@kernel.org> Cc: Naoya Horiguchi <n-horigu...@ah.jp.nec.com> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Vlastimil Babka <vba...@suse.cz> Cc: <sta...@vger.kernel.org> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- mm/huge_memory.c | 6 ------ 1 file changed, 6 deletions(-) --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2843,9 +2843,6 @@ 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); @@ -2858,9 +2855,6 @@ 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)
