From patchwork Tue Feb 20 08:49:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13563629 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 3BD4A5DF2B for ; Tue, 20 Feb 2024 08:49:40 +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=1708418981; cv=none; b=iZAeg7LCyUnNCbRQYaGnxmhoRd4i1DFToyhvvQ2pLPlFE8ZMn/gI0wyhWfv7S0ji3AdEoNjYSypQJ0x17IB3sekIlqCLNVhbT8XeLdEUsLKOZgsPT1qlIgH9FOyk1+Weh0iV7PC6VAqJBrVe8gGCjEY7nipQkbFcqP42YCIAilk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708418981; c=relaxed/simple; bh=OsAFS7njEVGlC+CAlb/I9tE7EFje1TFeh//d1gj2KqI=; h=From:To:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PJPPN/ynmKQI/rHHWaVqvsXAabH8MigP5oVsJN6xUvQnY6FLkOU0J9HfBn1lbvqysIBU1WgjF8a7uwH2NRDo7kph2D6meIt76WnVBcjxX7OFJkBZPKsGZJSeonT9yawE5uE47v+uPBAg+rDRFtV+Wzo/1voB5l9VbLuzfIdc84w= 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=q+Xuv9UD; 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="q+Xuv9UD" 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:References:In-Reply-To:Message-Id:Date:Subject:To:From:Sender: Reply-To:Cc:Content-Type:Content-ID:Content-Description; bh=qK76sLiKHDaIugADThNdCeAdCITdHp3R7WCpvZ/50Ys=; b=q+Xuv9UDwXHK+tkLGsYolzNTXG R4i+Mt0BZDHHWj0bFjoTaTV4Uf+ZLRjvOqwQnQ1QjdrjASB6LM+HWRzK56SCswy2aYtxd+lwQfOUz M1bu2VrcT7cgwkCOsvMNYemtsmevCZLF7gegxUDWG7sE9LYMV7Jb7xt7TyJ/9iUSdR4RG5IIK1ajt m5YEP4N9yEmyRAdoE62Vt5brNcei+BJohjnoWUwfYatrm4fKoPJDech8QrTVHR7nWoGlpFKJoBK6e /0W1zm/+qrYqHmXJDwLThtVyh3O1D/IfYEdgsCSgxxBHtaCdU8NUXUWYRwFAljvbygirx8S5992Sk E75cYLdg==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1rcLoo-0000000DnUj-02wS; Tue, 20 Feb 2024 08:49:38 +0000 From: Christoph Hellwig To: Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , =?utf-8?q?Roger_Pau_M?= =?utf-8?q?onn=C3=A9?= , Jens Axboe , xen-devel@lists.xenproject.org, linux-block@vger.kernel.org Subject: [PATCH 3/4] xen-blkfront: don't redundantly set max_sements in blkif_recover Date: Tue, 20 Feb 2024 09:49:34 +0100 Message-Id: <20240220084935.3282351-4-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240220084935.3282351-1-hch@lst.de> References: <20240220084935.3282351-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html blkif_set_queue_limits already sets the max_sements limits, so don't do it a second time. Also remove a comment about a long fixe bug in blk_mq_update_nr_hw_queues. Signed-off-by: Christoph Hellwig Acked-by: Roger Pau Monné --- drivers/block/xen-blkfront.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 1258f24b285500..7664638a0abbfa 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -2008,14 +2008,10 @@ static int blkif_recover(struct blkfront_info *info) struct request *req, *n; int rc; struct bio *bio; - unsigned int segs; struct blkfront_ring_info *rinfo; blkfront_gather_backend_features(info); - /* Reset limits changed by blk_mq_update_nr_hw_queues(). */ blkif_set_queue_limits(info); - segs = info->max_indirect_segments ? : BLKIF_MAX_SEGMENTS_PER_REQUEST; - blk_queue_max_segments(info->rq, segs / GRANTS_PER_PSEG); for_each_rinfo(info, rinfo, r_index) { rc = blkfront_setup_indirect(rinfo); @@ -2035,7 +2031,9 @@ static int blkif_recover(struct blkfront_info *info) list_for_each_entry_safe(req, n, &info->requests, queuelist) { /* Requeue pending requests (flush or discard) */ list_del_init(&req->queuelist); - BUG_ON(req->nr_phys_segments > segs); + BUG_ON(req->nr_phys_segments > + (info->max_indirect_segments ? : + BLKIF_MAX_SEGMENTS_PER_REQUEST)); blk_mq_requeue_request(req, false); } blk_mq_start_stopped_hw_queues(info->rq, true);