Commit b7b04004 authored Mar 25, 2015 by Mel Gorman Committed by Linus Torvalds Mar 25, 2015

mm: numa: mark huge PTEs young when clearing NUMA hinting faults



Base PTEs are marked young when the NUMA hinting information is cleared
but the same does not happen for huge pages which this patch addresses.

Note that migrated pages are not marked young as the base page migration
code does not assume that migrated pages have been referenced.  This
could be addressed but beyond the scope of this series which is aimed at
Dave Chinners shrink workload that is unlikely to be affected by this
issue.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 074c2381

mm/huge_memory.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1358,6 +1358,7 @@ clear_pmdnuma:
		BUG_ON(!PageLocked(page));
		was_writable = pmd_write(pmd);
		pmd = pmd_modify(pmd, vma->vm_page_prot);
		pmd = pmd_mkyoung(pmd);
		if (was_writable)
		pmd = pmd_mkwrite(pmd);
		set_pmd_at(mm, haddr, pmdp, pmd);

Admin message