From: Wei Yang richard.weiyang@gmail.com
[ Upstream commit 8b09549c2bfd9f3f8f4cdad74107ef4f4ff9cdd7 ]
Commit fa5e084e43eb ("vmscan: do not unconditionally treat zones that fail zone_reclaim() as full") changed the return value of node_reclaim(). The original return value 0 means NODE_RECLAIM_SOME after this commit.
While the return value of node_reclaim() when CONFIG_NUMA is n is not changed. This will leads to call zone_watermark_ok() again.
This patch fixes the return value by adjusting to NODE_RECLAIM_NOSCAN. Since node_reclaim() is only called in page_alloc.c, move it to mm/internal.h.
Link: http://lkml.kernel.org/r/20181113080436.22078-1-richard.weiyang@gmail.com Signed-off-by: Wei Yang richard.weiyang@gmail.com Acked-by: Michal Hocko mhocko@suse.com Reviewed-by: Matthew Wilcox willy@infradead.org Cc: Mel Gorman mgorman@techsingularity.net Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/swap.h | 6 ------ mm/internal.h | 10 ++++++++++ 2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/include/linux/swap.h b/include/linux/swap.h index 7bd0a6f2ac2b0..ee8f9f554a9e1 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -371,14 +371,8 @@ extern unsigned long vm_total_pages; extern int node_reclaim_mode; extern int sysctl_min_unmapped_ratio; extern int sysctl_min_slab_ratio; -extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int); #else #define node_reclaim_mode 0 -static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask, - unsigned int order) -{ - return 0; -} #endif
extern int page_evictable(struct page *page); diff --git a/mm/internal.h b/mm/internal.h index 87256ae1bef86..397183c8fe47b 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -444,6 +444,16 @@ static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, #define NODE_RECLAIM_SOME 0 #define NODE_RECLAIM_SUCCESS 1
+#ifdef CONFIG_NUMA +extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int); +#else +static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask, + unsigned int order) +{ + return NODE_RECLAIM_NOSCAN; +} +#endif + extern int hwpoison_filter(struct page *p);
extern u32 hwpoison_filter_dev_major;