From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 455F61FBEA6; Thu, 9 Jan 2025 05:58:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736402302; cv=none; b=bZY/jeXtHndvN+dAQkmqecLZyrfGp/Tb/V7kjbLjHtaaFwd2RelXpolYYTSwJsctifjnmAgxhnpmCuO033J08jLr/bnB2MpjKVR4zT252PaPZD+IWYkU7Tw6+QWzjjp3r6J3GIFWXy35mVAi2JigdQr34GInP7X8Q7+oqHmeOxc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736402302; c=relaxed/simple; bh=H3PtEdPDxoNtq8/aHhM4+vA6XXgdiAd5Q96eNGxhGgA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=agMKEt9Ozcy+ep14xzq1eDLw2gTKCWfGj8ZGZz3aPNfuAEwcyyDsPpkRtvQf6gw8onpFW896E6+K7BxMfot+nBzYLnWBYeQHYo1OHIOKrV6PURuFPTuRFpfgQKA4NmqdSIpedDaNytNGQoYx55v5mcoW712EQG0QOEPL7Akut2Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=EBTBa7P6; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="EBTBa7P6" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=RV6MVgH2DNJxl8EQ0KHNCuUkupBWVrL6lb2FtLgyOeM=; b=EBTBa7P6nyJwJDoZ3F2Q0jIXRC c0+L6d31WFC244bP66+Bc1YzYa992JLRfVV6l3gmQS8qf1mtzXNbwPsRjQJXzC97B7H52o6pIzyet 5jtcMoizqARANnzDI7fVf9dDTGRGu7pFK29C6qvExc6UBUCBGC3ttbjdlQ1J8HogJmyEJqfbr2pet 4Eop1tzhVc8ikFKB5xBVRg4Nmdn+i6Alo53XwHt6jG0xtvrZQ0xOCaLgT1HKd/dAmk3d5tYzGNxta rtaapb+fWF0AQCoqSpFGFd/iTQo7CSyLMb0SV1qX8wA//Rk62CLmErLJ3q1+KrJvzZLDAHJbKfrkh cdf6ThGA==; Received: from 2a02-8389-2341-5b80-ddeb-cdec-70b9-e2f0.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:ddeb:cdec:70b9:e2f0] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1tVlYc-0000000ArC0-2oRo; Thu, 09 Jan 2025 05:58:15 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Damien Le Moal , Ming Lei , Nilay Shroff , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, nbd@other.debian.org, linux-scsi@vger.kernel.org, usb-storage@lists.one-eyed-alien.net Subject: fix queue freeze and limit locking order v3 Date: Thu, 9 Jan 2025 06:57:21 +0100 Message-ID: <20250109055810.1402918-1-hch@lst.de> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Hi all, this is my version of Damien's "Fix queue freeze and limit locking order". A lot looks very similar, but it was done independently based on the previous discussion. Changes since v2: - check for polling support under q_usage_counter - improve a commit log Changes since v1: - more comment typo fixing - fix loop as well - make the poll sysfs attr show method more accurate Changes since RFC: - fix a bizzare virtio_blk bisection snafu - set BLK_FEAT_POLL a little less eagerly for blk-mq - drop the loop patch just adding a comment - improve various commit logs and coments Diffstat: block/blk-core.c | 17 ++++- block/blk-integrity.c | 4 - block/blk-mq.c | 17 ----- block/blk-settings.c | 27 +++++++- block/blk-sysfs.c | 134 ++++++++++++++++++++--------------------- block/blk-zoned.c | 7 -- block/blk.h | 1 drivers/block/loop.c | 52 ++++++++++----- drivers/block/nbd.c | 17 ----- drivers/block/virtio_blk.c | 4 - drivers/nvme/host/core.c | 9 +- drivers/scsi/sd.c | 17 +---- drivers/scsi/sr.c | 5 - drivers/usb/storage/scsiglue.c | 5 - include/linux/blkdev.h | 5 - 15 files changed, 164 insertions(+), 157 deletions(-)