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From:   Aaron Lu <aaron.lu@intel.com>
To:     linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Michal Hocko <mhocko@suse.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        Mel Gorman <mgorman@techsingularity.net>,
        Matthew Wilcox <willy@infradead.org>,
        Daniel Jordan <daniel.m.jordan@oracle.com>,
        Tariq Toukan <tariqt@mellanox.com>,
        Yosef Lev <levyossi@icloud.com>,
        Jesper Dangaard Brouer <brouer@redhat.com>
Subject: [RFC PATCH 1/9] mm: do not add anon pages to LRU
Date:   Tue, 11 Sep 2018 13:36:08 +0800
Message-Id: <20180911053616.6894-2-aaron.lu@intel.com>
In-Reply-To: <20180911053616.6894-1-aaron.lu@intel.com>
References: <20180911053616.6894-1-aaron.lu@intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

For the sake of testing purpose, do not add anon pages to LRU to
avoid LRU lock so we can test zone lock exclusively.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index c467102a5cbc..080641255b8b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3208,7 +3208,7 @@ static vm_fault_t do_anonymous_page(struct vm_fault *vmf)
 	inc_mm_counter_fast(vma->vm_mm, MM_ANONPAGES);
 	page_add_new_anon_rmap(page, vma, vmf->address, false);
 	mem_cgroup_commit_charge(page, memcg, false, false);
-	lru_cache_add_active_or_unevictable(page, vma);
+	//lru_cache_add_active_or_unevictable(page, vma);
 setpte:
 	set_pte_at(vma->vm_mm, vmf->address, vmf->pte, entry);
 
-- 
2.17.1