linux-kernel - [PATCH v8 06/17] mm: Refactoring in workingset

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Date:   Tue, 03 Jul 2018 18:09:36 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     vdavydov.dev@...il.com, shakeelb@...gle.com,
        viro@...iv.linux.org.uk, hannes@...xchg.org, mhocko@...nel.org,
        tglx@...utronix.de, pombredanne@...b.com, stummala@...eaurora.org,
        gregkh@...uxfoundation.org, sfr@...b.auug.org.au, guro@...com,
        mka@...omium.org, penguin-kernel@...ove.SAKURA.ne.jp,
        chris@...is-wilson.co.uk, longman@...hat.com, minchan@...nel.org,
        ying.huang@...el.com, mgorman@...hsingularity.net, jbacik@...com,
        linux@...ck-us.net, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, willy@...radead.org, lirongqing@...du.com,
        aryabinin@...tuozzo.com, akpm@...ux-foundation.org,
        ktkhai@...tuozzo.com
Subject: [PATCH v8 06/17] mm: Refactoring in workingset_init()

Use prealloc_shrinker()/register_shrinker_prepared()
instead of register_shrinker(). This will be used
in next patch.

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
Acked-by: Vladimir Davydov <vdavydov.dev@...il.com>
Tested-by: Shakeel Butt <shakeelb@...gle.com>
---
 mm/workingset.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/mm/workingset.c b/mm/workingset.c
index a466e731231d..b16489c60471 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -507,16 +507,17 @@ static int __init workingset_init(void)
 	pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n",
 	       timestamp_bits, max_order, bucket_order);
 
-	/* list_lru lock nests inside the IRQ-safe i_pages lock */
-	ret = __list_lru_init(&shadow_nodes, true, true, &shadow_nodes_key);
+	ret = prealloc_shrinker(&workingset_shadow_shrinker);
 	if (ret)
 		goto err;
-	ret = register_shrinker(&workingset_shadow_shrinker);
+	/* list_lru lock nests inside the IRQ-safe i_pages lock */
+	ret = __list_lru_init(&shadow_nodes, true, true, &shadow_nodes_key);
 	if (ret)
 		goto err_list_lru;
+	register_shrinker_prepared(&workingset_shadow_shrinker);
 	return 0;
 err_list_lru:
-	list_lru_destroy(&shadow_nodes);
+	free_prealloced_shrinker(&workingset_shadow_shrinker);
 err:
 	return ret;
 }