On Sun, 16 Feb 2014, Weijie Yang wrote: > In putback_inactive_pages() and move_active_pages_to_lru(), > lruvec is already an input parameter and pages are all from this lruvec, > therefore there is no need to call mem_cgroup_page_lruvec() in loop. > > Signed-off-by: Weijie Yang <weijie.y...@samsung.com>
Looks plausible but I believe it's incorrect. The lruvec passed in is the one we took the pages from, but there's a small but real chance that the page has become uncharged meanwhile, and should now be put back on the root_mem_cgroup's lruvec instead of the original memcg's lruvec. Hugh > --- > mm/vmscan.c | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/mm/vmscan.c b/mm/vmscan.c > index a9c74b4..4804fdb 100644 > --- a/mm/vmscan.c > +++ b/mm/vmscan.c > @@ -1393,8 +1393,6 @@ putback_inactive_pages(struct lruvec *lruvec, struct > list_head *page_list) > continue; > } > > - lruvec = mem_cgroup_page_lruvec(page, zone); > - > SetPageLRU(page); > lru = page_lru(page); > add_page_to_lru_list(page, lruvec, lru); > @@ -1602,7 +1600,6 @@ static void move_active_pages_to_lru(struct lruvec > *lruvec, > > while (!list_empty(list)) { > page = lru_to_page(list); > - lruvec = mem_cgroup_page_lruvec(page, zone); > > VM_BUG_ON_PAGE(PageLRU(page), page); > SetPageLRU(page); > -- > 1.7.10.4 > > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majord...@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"d...@kvack.org"> em...@kvack.org </a> > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/