From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f69.google.com (mail-pg0-f69.google.com [74.125.83.69]) by kanga.kvack.org (Postfix) with ESMTP id 287C56B0069 for ; Tue, 26 Sep 2017 04:47:41 -0400 (EDT) Received: by mail-pg0-f69.google.com with SMTP id 11so20753149pge.4 for ; Tue, 26 Sep 2017 01:47:41 -0700 (PDT) Received: from xiaomi.com (outboundhk.mxmail.xiaomi.com. [207.226.244.125]) by mx.google.com with ESMTPS id 60si1418902ple.818.2017.09.26.01.47.39 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 26 Sep 2017 01:47:40 -0700 (PDT) From: Hui Zhu Subject: [RFC 1/2] Try to use HighAtomic if try to alloc umovable page that order is not 0 Date: Tue, 26 Sep 2017 16:46:43 +0800 Message-ID: <1506415604-4310-2-git-send-email-zhuhui@xiaomi.com> In-Reply-To: <1506415604-4310-1-git-send-email-zhuhui@xiaomi.com> References: <1506415604-4310-1-git-send-email-zhuhui@xiaomi.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, mhocko@suse.com, vbabka@suse.cz, mgorman@techsingularity.net, hillf.zj@alibaba-inc.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: teawater@gmail.com, Hui Zhu The page add a new condition to let gfp_to_alloc_flags return alloc_flags with ALLOC_HARDER if the order is not 0 and migratetype is MIGRATE_UNMOVABLE. Then alloc umovable page that order is not 0 will try to use HighAtomic. Signed-off-by: Hui Zhu --- mm/page_alloc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c841af8..b54e94a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3642,7 +3642,7 @@ static void wake_all_kswapds(unsigned int order, const struct alloc_context *ac) } static inline unsigned int -gfp_to_alloc_flags(gfp_t gfp_mask) +gfp_to_alloc_flags(gfp_t gfp_mask, int order, int migratetype) { unsigned int alloc_flags = ALLOC_WMARK_MIN | ALLOC_CPUSET; @@ -3671,6 +3671,8 @@ static void wake_all_kswapds(unsigned int order, const struct alloc_context *ac) alloc_flags &= ~ALLOC_CPUSET; } else if (unlikely(rt_task(current)) && !in_interrupt()) alloc_flags |= ALLOC_HARDER; + else if (order > 0 && migratetype == MIGRATE_UNMOVABLE) + alloc_flags |= ALLOC_HARDER; #ifdef CONFIG_CMA if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE) @@ -3903,7 +3905,7 @@ bool gfp_pfmemalloc_allowed(gfp_t gfp_mask) * kswapd needs to be woken up, and to avoid the cost of setting up * alloc_flags precisely. So we do that now. */ - alloc_flags = gfp_to_alloc_flags(gfp_mask); + alloc_flags = gfp_to_alloc_flags(gfp_mask, order, ac->migratetype); /* * We need to recalculate the starting point for the zonelist iterator -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org