From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6D20BEB64D9 for ; Tue, 27 Jun 2023 14:38:32 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B714810E2F5; Tue, 27 Jun 2023 14:38:31 +0000 (UTC) X-Greylist: delayed 561 seconds by postgrey-1.36 at gabe; Thu, 22 Jun 2023 08:35:20 UTC Received: from out-48.mta0.migadu.com (out-48.mta0.migadu.com [91.218.175.48]) by gabe.freedesktop.org (Postfix) with ESMTPS id 21E1310E4FA for ; Thu, 22 Jun 2023 08:35:20 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1687422388; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oQpOCkSVz0jjdFm4oEP2NJJ+zKFOVCxqbVN/b6qKeiM=; b=Vou+QBcBsFfrycM2PkKySs/6vc7t4z2y+ESRPtdGGBu1nh2ELX2n3XwLyStu2J7FwIsey0 GRSdEt3Uk6O3X+qjfRuw6k2zIEyamPbwTm+TOHkS5CEaR6KvBgQJdhpJF9uZHGex1bKqla yWmLNi3h067slmAnbRZ3GfDMps2hTHE= From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu Date: Thu, 22 Jun 2023 08:24:27 +0000 Message-Id: <20230622082454.4090236-3-qi.zheng@linux.dev> In-Reply-To: <20230622082454.4090236-1-qi.zheng@linux.dev> References: <20230622082454.4090236-1-qi.zheng@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Mailman-Approved-At: Tue, 27 Jun 2023 14:38:30 +0000 Subject: [Intel-gfx] [PATCH 02/29] mm: vmscan: introduce some helpers for dynamically allocating shrinker X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mst@redhat.com, neilb@suse.de, jasowang@redhat.com, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-mm@kvack.org, song@kernel.org, dm-devel@redhat.com, ray.huang@amd.com, namit@vmware.com, marijn.suijten@somainline.org, airlied@gmail.com, agk@redhat.com, robh@kernel.org, senozhatsky@chromium.org, david@redhat.com, clm@fb.com, steven.price@arm.com, alyssa.rosenzweig@collabora.com, Qi Zheng , josef@toxicpanda.com, linux-ext4@vger.kernel.org, kent.overstreet@gmail.com, xuanzhuo@linux.alibaba.com, linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org, snitzer@kernel.org, quic_abhinavk@quicinc.com, colyli@suse.de, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-bcache@vger.kernel.org, viro@zeniv.linux.org.uk, dsterba@suse.com, linux-nfs@vger.kernel.org, tomeu.vizoso@collabora.com, kolga@netapp.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, minchan@kernel.org, chuck.lever@oracle.com, daniel@ffwll.ch, jack@suse.com, dmitry.baryshkov@linaro.org, adilger.kernel@dilger.ca, freedreno@lists.freedesktop.org, christian.koenig@amd.com, linux-btrfs@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Qi Zheng Introduce some helpers for dynamically allocating shrinker instance, and their uses are as follows: 1. shrinker_alloc_and_init() Used to allocate and initialize a shrinker instance, the priv_data parameter is used to pass the pointer of the previously embedded structure of the shrinker instance. 2. shrinker_free() Used to free the shrinker instance when the registration of shrinker fails. 3. unregister_and_free_shrinker() Used to unregister and free the shrinker instance, and the kfree() will be changed to kfree_rcu() later. Signed-off-by: Qi Zheng --- include/linux/shrinker.h | 12 ++++++++++++ mm/vmscan.c | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 43e6fcabbf51..8e9ba6fa3fcc 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -107,6 +107,18 @@ extern void unregister_shrinker(struct shrinker *shrinker); extern void free_prealloced_shrinker(struct shrinker *shrinker); extern void synchronize_shrinkers(void); +typedef unsigned long (*count_objects_cb)(struct shrinker *s, + struct shrink_control *sc); +typedef unsigned long (*scan_objects_cb)(struct shrinker *s, + struct shrink_control *sc); + +struct shrinker *shrinker_alloc_and_init(count_objects_cb count, + scan_objects_cb scan, long batch, + int seeks, unsigned flags, + void *priv_data); +void shrinker_free(struct shrinker *shrinker); +void unregister_and_free_shrinker(struct shrinker *shrinker); + #ifdef CONFIG_SHRINKER_DEBUG extern int shrinker_debugfs_add(struct shrinker *shrinker); extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, diff --git a/mm/vmscan.c b/mm/vmscan.c index 45d17c7cc555..64ff598fbad9 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -809,6 +809,41 @@ void unregister_shrinker(struct shrinker *shrinker) } EXPORT_SYMBOL(unregister_shrinker); +struct shrinker *shrinker_alloc_and_init(count_objects_cb count, + scan_objects_cb scan, long batch, + int seeks, unsigned flags, + void *priv_data) +{ + struct shrinker *shrinker; + + shrinker = kzalloc(sizeof(struct shrinker), GFP_KERNEL); + if (!shrinker) + return NULL; + + shrinker->count_objects = count; + shrinker->scan_objects = scan; + shrinker->batch = batch; + shrinker->seeks = seeks; + shrinker->flags = flags; + shrinker->private_data = priv_data; + + return shrinker; +} +EXPORT_SYMBOL(shrinker_alloc_and_init); + +void shrinker_free(struct shrinker *shrinker) +{ + kfree(shrinker); +} +EXPORT_SYMBOL(shrinker_free); + +void unregister_and_free_shrinker(struct shrinker *shrinker) +{ + unregister_shrinker(shrinker); + kfree(shrinker); +} +EXPORT_SYMBOL(unregister_and_free_shrinker); + /** * synchronize_shrinkers - Wait for all running shrinkers to complete. * -- 2.30.2