The totalreserve_pages could be higher than the free because of watermark high or watermark boost. Handle this situation and fix it to 0 free size. Signed-off-by: Jaewon Kim <jaewon31.kim@xxxxxxxxxxx> --- mm/page_alloc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 218b28ee49ed..e510ae83d5f3 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5948,6 +5948,8 @@ long si_mem_available(void) * without causing swapping or OOM. */ available = global_zone_page_state(NR_FREE_PAGES) - totalreserve_pages; + if (available < 0) + available = 0; /* * Not all the page cache can be freed, otherwise the system will -- 2.17.1
