From nobody Wed Dec 4 19:19:01 2024 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6243516F8E5; Wed, 20 Nov 2024 06:48:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732085306; cv=none; b=M5zD54bPM8G/jAijl3XfoTyQYzx2krR0Pz86hNhZRAB/BM5mC4P24Xc3CEYAQdeOgK2WScnGNcM/ieprTX2hsDg4pwbzA97k9j138UARrYYnvIkUqi0XqiRFunGmiyZ98QdhEvuZipmqGyzKt+kQZ9TKKbUGfcGtZejTSZZtpmU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732085306; c=relaxed/simple; bh=gF13eQVa0Ocaq1UGdDe667AyqYd4x7jSGMSKC4l9o1c=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=K01y6B00IA50FlSjJX31YQnLh9QE/1cJo+YQWvg1o3lQfrGSgpi1SIFcmWfOsancBpPu3eVvqhpfSmE7gh8cm2ThQtlcUS3UzCLpOudUT8IbbMdl8GqcFWZbIAVwtBRHJBsslEDADBqSPsskoDWQWqgWbGdvyZSTvhiS+0a9fh4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=nsoYeUbK; arc=none smtp.client-ip=220.197.31.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="nsoYeUbK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=6ho3G nqgGCt9fsxOHh+xodC+HlFBZfqO/I/iBHnLVCg=; b=nsoYeUbKFSvmbSvLA/Q68 lK8AQuvwO95fHEoj+QhFjv6DpRUBO6APzClm9J1nlFWnyGY2fAnqcouRAZfLE8v5 NUE6OEKlGBtiRep6ui6X11Wpd9p57xnQG0ukhOXDVFJxazJSPm4bgc7UaQigBtok 39+ru3S1RRuuz5Rn0ppXYs= Received: from localhost.localdomain (unknown [193.203.214.57]) by gzga-smtp-mtada-g1-2 (Coremail) with SMTP id _____wDnD1j4hT1nTO3OIQ--.22522S6; Wed, 20 Nov 2024 14:47:26 +0800 (CST) From: Ran Xiaokai To: juri.lelli@redhat.com, vincent.guittot@linaro.org, mingo@redhat.com, peterz@infradead.org, pshelar@ovn.org, davem@davemloft.net Cc: linux-kernel@vger.kernel.org, ran.xiaokai@zte.com.cn, linux-perf-users@vger.kernel.org, netdev@vger.kernel.org, dev@openvswitch.org Subject: [PATCH 2/4] perf/core: convert call_rcu(free_ctx) to kfree_rcu() Date: Wed, 20 Nov 2024 06:47:14 +0000 Message-Id: <20241120064716.3361211-3-ranxiaokai627@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241120064716.3361211-1-ranxiaokai627@163.com> References: <20241120064716.3361211-1-ranxiaokai627@163.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wDnD1j4hT1nTO3OIQ--.22522S6 X-Coremail-Antispam: 1Uf129KBjvdXoWrtF1fXw17AF1rKF17Gw18uFg_yoWkuwb_Xw 47JF9Fgw4jya9xZryDua13tr10qa9rta1Fyrs7tFZrJFy5Jws0yr1SyrZrZr95XanrZa43 KwsxXFn0qw48AjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IU1p6zUUUUUU== X-CM-SenderInfo: xudq5x5drntxqwsxqiywtou0bp/1tbiqRudTGc9e4T0vgABsN Content-Type: text/plain; charset="utf-8" From: Ran Xiaokai The rcu callback free_ctx() simply calls kfree(). It's better to directly call kfree_rcu(). Signed-off-by: Ran Xiaokai --- kernel/events/core.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 065f9188b44a..7f4cc9c41bbe 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -1210,14 +1210,6 @@ static void free_task_ctx_data(struct pmu *pmu, void= *task_ctx_data) kmem_cache_free(pmu->task_ctx_cache, task_ctx_data); } =20 -static void free_ctx(struct rcu_head *head) -{ - struct perf_event_context *ctx; - - ctx =3D container_of(head, struct perf_event_context, rcu_head); - kfree(ctx); -} - static void put_ctx(struct perf_event_context *ctx) { if (refcount_dec_and_test(&ctx->refcount)) { @@ -1225,7 +1217,7 @@ static void put_ctx(struct perf_event_context *ctx) put_ctx(ctx->parent_ctx); if (ctx->task && ctx->task !=3D TASK_TOMBSTONE) put_task_struct(ctx->task); - call_rcu(&ctx->rcu_head, free_ctx); + kfree_rcu(ctx, rcu_head); } } =20 --=20 2.17.1