Add page_is_file_cache() for __GFP_FS check, otherwise, a Pageswapcache() && PageDirty() page can always be write back if the gfp flag is __GFP_FS, this is not the expected behavior. Signed-off-by: yalin wang <yalin.wang2010@xxxxxxxxx> --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index bd2918e..f8fc8c1 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -930,7 +930,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, if (page_mapped(page) || PageSwapCache(page)) sc->nr_scanned++; - may_enter_fs = (sc->gfp_mask & __GFP_FS) || + may_enter_fs = (page_is_file_cache(page) && (sc->gfp_mask & __GFP_FS)) || (PageSwapCache(page) && (sc->gfp_mask & __GFP_IO)); /* -- 1.9.1 -- 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>