From patchwork Wed May 27 12:45:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Kagan X-Patchwork-Id: 11572943 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CC135159A for ; Wed, 27 May 2020 12:54:05 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A86712053B for ; Wed, 27 May 2020 12:54:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=yandex-team.ru header.i=@yandex-team.ru header.b="M8ZuAGhM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A86712053B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=yandex-team.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jdvXj-0001T5-Jf; Wed, 27 May 2020 12:52:23 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jdvRL-0000gl-Nl for xen-devel@lists.xenproject.org; Wed, 27 May 2020 12:45:47 +0000 X-Inumbo-ID: f91d9b40-a017-11ea-8993-bc764e2007e4 Received: from forwardcorp1p.mail.yandex.net (unknown [2a02:6b8:0:1472:2741:0:8b6:217]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id f91d9b40-a017-11ea-8993-bc764e2007e4; Wed, 27 May 2020 12:45:42 +0000 (UTC) Received: from mxbackcorp2j.mail.yandex.net (mxbackcorp2j.mail.yandex.net [IPv6:2a02:6b8:0:1619::119]) by forwardcorp1p.mail.yandex.net (Yandex) with ESMTP id 05C1E2E15A3; Wed, 27 May 2020 15:45:41 +0300 (MSK) Received: from iva4-7c3d9abce76c.qloud-c.yandex.net (iva4-7c3d9abce76c.qloud-c.yandex.net [2a02:6b8:c0c:4e8e:0:640:7c3d:9abc]) by mxbackcorp2j.mail.yandex.net (mxbackcorp/Yandex) with ESMTP id nqQj86Bk57-jbfq4Pkl; Wed, 27 May 2020 15:45:40 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1590583540; bh=5vTc+cYwJ0Yp/qYZkQZ2K2YBz+RbUpeML72x3NJFPMc=; h=In-Reply-To:Message-Id:References:Date:Subject:To:From:Cc; b=M8ZuAGhMsx+thLLDbKB6QLd0xI3uJHv/67y4TKRY/bZ+ez9EboHcOgdO7FSZX/7gx xj/pb4AGN2vS4pgcLBcJJgBd6ZYem3Hkwx03tMjUZRDlse10PYNpKpubdCsW5rUtkS Y0DVCZz3xDn0rgPyU2RF91ofdnmEY3eHdmqMoygs= Authentication-Results: mxbackcorp2j.mail.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from dynamic-vpn.dhcp.yndx.net (dynamic-vpn.dhcp.yndx.net [2a02:6b8:b080:8308::1:12]) by iva4-7c3d9abce76c.qloud-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id bzO5qPtczO-jbWOOqOL; Wed, 27 May 2020 15:45:37 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) From: Roman Kagan To: qemu-devel@nongnu.org Subject: [PATCH v6 5/5] block: lift blocksize property limit to 2 MiB Date: Wed, 27 May 2020 15:45:11 +0300 Message-Id: <20200527124511.986099-6-rvkagan@yandex-team.ru> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200527124511.986099-1-rvkagan@yandex-team.ru> References: <20200527124511.986099-1-rvkagan@yandex-team.ru> MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 27 May 2020 12:52:22 +0000 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , Stefano Stabellini , =?utf-8?q?Daniel_P=2E_Berrang?= =?utf-8?q?=C3=A9?= , Eduardo Habkost , qemu-block@nongnu.org, Paul Durrant , Eric Blake , "Michael S. Tsirkin" , Laurent Vivier , Max Reitz , John Snow , Keith Busch , Gerd Hoffmann , Stefan Hajnoczi , Paolo Bonzini , Anthony Perard , xen-devel@lists.xenproject.org, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Logical and physical block sizes in QEMU are limited to 32 KiB. This appears unnecessary tight, and we've seen bigger block sizes handy at times. Lift the limitation up to 2 MiB which appears to be good enough for everybody, and matches the qcow2 cluster size limit. Signed-off-by: Roman Kagan Reviewed-by: Eric Blake --- v4 -> v5: - split out into separate patch [Philippe] - as this patch has changed significantly lose Eric's r-b hw/core/qdev-properties.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index e7ccd4d276..ecd84262a9 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -784,9 +784,12 @@ const PropertyInfo qdev_prop_size32 = { /* lower limit is sector size */ #define MIN_BLOCK_SIZE 512 #define MIN_BLOCK_SIZE_STR stringify(MIN_BLOCK_SIZE) -/* upper limit is the max power of 2 that fits in uint16_t */ -#define MAX_BLOCK_SIZE 32768 -#define MAX_BLOCK_SIZE_STR stringify(MAX_BLOCK_SIZE) +/* + * upper limit is arbitrary, 2 MiB looks sufficient for all sensible uses, and + * matches qcow2 cluster size limit + */ +#define MAX_BLOCK_SIZE (2 * MiB) +#define MAX_BLOCK_SIZE_STR "2 MiB" static void set_blocksize(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp)