From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 370443D54C; Mon, 18 Dec 2023 14:13:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="viR6Qb4Z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B0C32C433C7; Mon, 18 Dec 2023 14:13:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1702908831; bh=Eyr0GeekwiFoCA5d7JyhAQOSuvAm/qhyED0WVbpMdQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=viR6Qb4ZbtZ2pnoI9XO83FpcGtYXK2j+IjEmvB0dudkAqYJ77njHzHhNFVVocSWK7 K51jQj8VrST+4SwGu9ZU5wCiPz7g654a8guY7DXUaSo4aWBu1Dh9/bDlWRHzexQZ5j X6iZxBAeZ2yrRaJurXBnLvMsr+0+9ZuoeTo3wcFI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ming Lei , Jens Axboe , Sasha Levin Subject: [PATCH 5.15 49/83] blk-cgroup: bypass blkcg_deactivate_policy after destroying Date: Mon, 18 Dec 2023 14:52:10 +0100 Message-ID: <20231218135051.898915592@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231218135049.738602288@linuxfoundation.org> References: <20231218135049.738602288@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ming Lei [ Upstream commit e63a57303599b17290cd8bc48e6f20b24289a8bc ] blkcg_deactivate_policy() can be called after blkg_destroy_all() returns, and it isn't necessary since blkg_destroy_all has covered policy deactivation. Signed-off-by: Ming Lei Link: https://lore.kernel.org/r/20231117023527.3188627-4-ming.lei@redhat.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- block/blk-cgroup.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 3ee4c1217b636..fd81a73708645 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -425,6 +425,7 @@ static void blkg_destroy_all(struct request_queue *q) { struct blkcg_gq *blkg, *n; int count = BLKG_DESTROY_BATCH_SIZE; + int i; restart: spin_lock_irq(&q->queue_lock); @@ -447,6 +448,18 @@ static void blkg_destroy_all(struct request_queue *q) } } + /* + * Mark policy deactivated since policy offline has been done, and + * the free is scheduled, so future blkcg_deactivate_policy() can + * be bypassed + */ + for (i = 0; i < BLKCG_MAX_POLS; i++) { + struct blkcg_policy *pol = blkcg_policy[i]; + + if (pol) + __clear_bit(pol->plid, q->blkcg_pols); + } + q->root_blkg = NULL; spin_unlock_irq(&q->queue_lock); } -- 2.43.0