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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5399BC432C0 for ; Mon, 2 Dec 2019 18:22:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 280412073F for ; Mon, 2 Dec 2019 18:22:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575310936; bh=GM9x5oFD315ThqJdwgNwc9/W5+o4jD2xqsnfXr3DkqQ=; h=From:To:Cc:Subject:Date:List-ID:From; b=zQwf6Pv8+9bE7s9fCFOcNX60pzfErg00z+D3mZgdC5UmoJvogHdVsB/rRakdLpYSF /6mJtxT0J1Qv2iXzNvQzd2jY+1JGuNmP4qqyB1t/SRbkW48jBfsMgIIYtCtRrMbPwo ua/vRYYaooRiX4vIpN+ehUGysD+3j0JfiLISfhco= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727873AbfLBSWP (ORCPT ); Mon, 2 Dec 2019 13:22:15 -0500 Received: from mail.kernel.org ([198.145.29.99]:57590 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727868AbfLBSWP (ORCPT ); Mon, 2 Dec 2019 13:22:15 -0500 Received: from ebiggers-linuxstation.mtv.corp.google.com (unknown [104.132.1.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9885A20718; Mon, 2 Dec 2019 18:22:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575310934; bh=GM9x5oFD315ThqJdwgNwc9/W5+o4jD2xqsnfXr3DkqQ=; h=From:To:Cc:Subject:Date:From; b=foXWy5F9W+QNZoHDNgM1wmWAh3R68egzgHWli6w18Jl/sUOZgg1G9kxDGGofc6+dt /T2p5oT+e68OcxnS0ofwuRwFJtnbfsMD7S9gfvQshay6nmmXQtjBwLu/9ZKTBf3RR4 hEn192YI20efDh7amMMBRr3QQKdhU2iFLIWueKbU= From: Eric Biggers To: linux-block@vger.kernel.org, Jens Axboe Cc: Christoph Hellwig , Jan Kara Subject: [PATCH] block: don't send uevent for empty disk when not invalidating Date: Mon, 2 Dec 2019 10:21:34 -0800 Message-Id: <20191202182134.4004-1-ebiggers@kernel.org> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Eric Biggers Commit 6917d0689993 ("block: merge invalidate_partitions into rescan_partitions") caused a regression where systemd-udevd spins forever using max CPU starting at boot time. It's caused by a behavior change where a KOBJ_CHANGE uevent is now sent in a case where previously it wasn't. Restore the old behavior. Fixes: 6917d0689993 ("block: merge invalidate_partitions into rescan_partitions") Signed-off-by: Eric Biggers --- fs/block_dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index ee63c2732fa295..69bf2fb6f7cda0 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1531,7 +1531,7 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate) ret = blk_add_partitions(disk, bdev); if (ret == -EAGAIN) goto rescan; - } else { + } else if (invalidate) { /* * Tell userspace that the media / partition table may have * changed. -- 2.24.0.393.g34dc348eaf-goog