From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f71.google.com (mail-pg0-f71.google.com [74.125.83.71]) by kanga.kvack.org (Postfix) with ESMTP id 5E4A56B0279 for ; Tue, 6 Jun 2017 23:22:05 -0400 (EDT) Received: by mail-pg0-f71.google.com with SMTP id t126so489905pgc.9 for ; Tue, 06 Jun 2017 20:22:05 -0700 (PDT) Received: from szxga01-in.huawei.com (szxga01-in.huawei.com. [45.249.212.187]) by mx.google.com with ESMTPS id d28si448877plj.363.2017.06.06.20.22.02 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 06 Jun 2017 20:22:04 -0700 (PDT) From: zhongjiang Subject: [PATCH] Revert "mm: vmpressure: fix sending wrong events on underflow" Date: Wed, 7 Jun 2017 11:08:37 +0800 Message-ID: <1496804917-7628-1-git-send-email-zhongjiang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org Cc: minchan@kernel.org, vinayakm.list@gmail.com, mhocko@suse.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org This reverts commit e1587a4945408faa58d0485002c110eb2454740c. THP lru page is reclaimed , THP is split to normal page and loop again. reclaimed pages should not be bigger than nr_scan. because of each loop will increase nr_scan counter. Signed-off-by: zhongjiang --- mm/vmpressure.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/mm/vmpressure.c b/mm/vmpressure.c index 6063581..149fdf6 100644 --- a/mm/vmpressure.c +++ b/mm/vmpressure.c @@ -112,16 +112,9 @@ static enum vmpressure_levels vmpressure_calc_level(unsigned long scanned, unsigned long reclaimed) { unsigned long scale = scanned + reclaimed; - unsigned long pressure = 0; + unsigned long pressure; /* - * reclaimed can be greater than scanned in cases - * like THP, where the scanned is 1 and reclaimed - * could be 512 - */ - if (reclaimed >= scanned) - goto out; - /* * We calculate the ratio (in percents) of how many pages were * scanned vs. reclaimed in a given time frame (window). Note that * time is in VM reclaimer's "ticks", i.e. number of pages @@ -131,7 +124,6 @@ static enum vmpressure_levels vmpressure_calc_level(unsigned long scanned, pressure = scale - (reclaimed * scale / scanned); pressure = pressure * 100 / scale; -out: pr_debug("%s: %3lu (s: %lu r: %lu)\n", __func__, pressure, scanned, reclaimed); -- 1.7.12.4 -- 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