On Tue, Oct 03, 2017 at 07:47:20PM +0300, Andrey Ryabinin wrote: > Commit 3a321d2a3dde separated NUMA counters from zone counters, but > the NUMA_INTERLEAVE_HIT call site wasn't updated to use the new interface. > So alloc_page_interleave() actually increments NR_ZONE_INACTIVE_FILE > instead of NUMA_INTERLEAVE_HIT. > > Fix this by using __inc_numa_state() interface to increment > NUMA_INTERLEAVE_HIT. > > Fixes: 3a321d2a3dde ("mm: change the call sites of numa statistics items") > Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> > --- > mm/mempolicy.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/mm/mempolicy.c b/mm/mempolicy.c > index 006ba625c0b8..3a18f0a091c4 100644 > --- a/mm/mempolicy.c > +++ b/mm/mempolicy.c > @@ -1920,8 +1920,13 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, > struct page *page; > > page = __alloc_pages(gfp, order, nid); > - if (page && page_to_nid(page) == nid) > - inc_zone_page_state(page, NUMA_INTERLEAVE_HIT); > + if (page && page_to_nid(page) == nid) { > + unsigned long flags; > + > + local_irq_save(flags); > + __inc_numa_state(page_zone(page), NUMA_INTERLEAVE_HIT); > + local_irq_restore(flags); > + } > return page; > } alloc_page_interleave is only called from !irq contexts and the requirements for __inc_numa_state should only require interrupt disabling if that particular counter can be updated from interrupt context. Disabling preemption should be sufficient for NUMA_INTERLEAVE_HIT and would be cheaper. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>