From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mel Gorman , Johannes Weiner , Rik van Riel , Andrew Morton , Linus Torvalds Subject: [PATCH 3.14 47/77] mm: page_alloc: do not treat a zone that cannot be used for dirty pages as "full" Date: Tue, 27 Jan 2015 17:27:25 -0800 Message-Id: <20150128012747.375831920@linuxfoundation.org> In-Reply-To: <20150128012745.971137091@linuxfoundation.org> References: <20150128012745.971137091@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mel Gorman commit 800a1e750c7b04c2aa2459afca77e936e01c0029 upstream. If a zone cannot be used for a dirty page then it gets marked "full" which is cached in the zlc and later potentially skipped by allocation requests that have nothing to do with dirty zones. Signed-off-by: Mel Gorman Acked-by: Johannes Weiner Reviewed-by: Rik van Riel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Mel Gorman Signed-off-by: Greg Kroah-Hartman --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1991,7 +1991,7 @@ zonelist_scan: */ if ((alloc_flags & ALLOC_WMARK_LOW) && (gfp_mask & __GFP_WRITE) && !zone_dirty_ok(zone)) - goto this_zone_full; + continue; mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK]; if (!zone_watermark_ok(zone, order, mark,