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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F03C2EB64D7 for ; Mon, 26 Jun 2023 18:34:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232339AbjFZSeV (ORCPT ); Mon, 26 Jun 2023 14:34:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232355AbjFZSeR (ORCPT ); Mon, 26 Jun 2023 14:34:17 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4170102 for ; Mon, 26 Jun 2023 11:34:14 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3B27660F3E for ; Mon, 26 Jun 2023 18:34:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F7B2C433C8; Mon, 26 Jun 2023 18:34:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687804453; bh=dl9c9airJ9gRrweXyC7jRYfXSh1NGAcASrPhlq6/GFk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bsZhNDW4D5q5I+VzgoKH421QDiNwGp7EWBV4rYJAqcVIoN2GlZ1veKpS3XHctShQm PNyfzz2F6YlcngYMM6mCsrVX4W1G2w8WHbF59BT0ac0x5JBN7c5dd3kXnmP/6BQtFv JPiKitNxq3VdfMPSyw8EjTb9KNIW9sWefco8S6yg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Anuj Gupta , Nitesh Shetty , Jens Axboe , Sasha Levin Subject: [PATCH 6.1 161/170] null_blk: Fix: memory release when memory_backed=1 Date: Mon, 26 Jun 2023 20:12:10 +0200 Message-ID: <20230626180807.689208168@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180800.476539630@linuxfoundation.org> References: <20230626180800.476539630@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Nitesh Shetty [ Upstream commit 8cfb98196cceec35416041c6b91212d2b99392e4 ] Memory/pages are not freed, when unloading nullblk driver. Steps to reproduce issue 1.free -h total used free shared buff/cache available Mem: 7.8Gi 260Mi 7.1Gi 3.0Mi 395Mi 7.3Gi Swap: 0B 0B 0B 2.modprobe null_blk memory_backed=1 3.dd if=/dev/urandom of=/dev/nullb0 oflag=direct bs=1M count=1000 4.modprobe -r null_blk 5.free -h total used free shared buff/cache available Mem: 7.8Gi 1.2Gi 6.1Gi 3.0Mi 398Mi 6.3Gi Swap: 0B 0B 0B Signed-off-by: Anuj Gupta Signed-off-by: Nitesh Shetty Link: https://lore.kernel.org/r/20230605062354.24785-1-nj.shetty@samsung.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/block/null_blk/main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index c45d09a9a9421..e8cb914223cdf 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -2194,6 +2194,7 @@ static void null_destroy_dev(struct nullb *nullb) struct nullb_device *dev = nullb->dev; null_del_dev(nullb); + null_free_device_storage(dev, false); null_free_dev(dev); } -- 2.39.2