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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 1482CC433E0 for ; Wed, 20 Jan 2021 13:54:59 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 40D9423340 for ; Wed, 20 Jan 2021 13:54:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 40D9423340 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=igalia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:39716 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l2Dwn-0000gt-Az for qemu-devel@archiver.kernel.org; Wed, 20 Jan 2021 08:54:57 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:49812) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l2DuW-0007Ru-K4; Wed, 20 Jan 2021 08:52:38 -0500 Received: from fanzine.igalia.com ([178.60.130.6]:56797) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l2DuL-0003VP-SP; Wed, 20 Jan 2021 08:52:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Type:MIME-Version:Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From; bh=92MUKKvF+r2XsnsxvbBnmenVvM/uJGxRx1NgB4bmJVs=; b=qZlXNuS/fM1HPCqOpnFmfEh3tM9w5IpH8/j1KD92bOjZCI056Vjn8mB26tNqFMGooxkjkl6eKfk1iAwPlUSnDbMF0g2rcTr8xToxSMMC6fDUPfGjeQynxse7kp2/OalElUss3dfnp96yTxtDybmRIV7hp27/zp7aPYWdR4dWHolRUsuuivuDM7pNDPDdkpAMZMvvVpGeItrI6SgPdSr9P+NzMaOsUvGzMEy7O3ykTH/zhmhwmNek3SYZt58s629VxUE2QGbvGvCFgL9YkGjVlXnejE8mnl61NKrrcggCU822rwzRDSmDp/FMNCMIZ9lyiy0PXe4cWfZoB6SH+j8lVg==; Received: from maestria.local.igalia.com ([192.168.10.14] helo=mail.igalia.com) by fanzine.igalia.com with esmtps (Cipher TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim) id 1l2Dtv-0002fH-Np; Wed, 20 Jan 2021 14:51:59 +0100 Received: from berto by mail.igalia.com with local (Exim) id 1l2Dtv-0006dg-EV; Wed, 20 Jan 2021 14:51:59 +0100 From: Alberto Garcia To: Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org Subject: Re: [RFC PATCH 0/2] Allow changing bs->file on reopen In-Reply-To: References: User-Agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) Date: Wed, 20 Jan 2021 14:51:59 +0100 Message-ID: MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=178.60.130.6; envelope-from=berto@igalia.com; helo=fanzine.igalia.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Kashyap Chamarthy , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Mon 18 Jan 2021 11:22:49 AM CET, Vladimir Sementsov-Ogievskiy wrote: >> This is still an RFC but you can see the idea. > > Good idea and I glad to see that my patches help:) > > Hmm, still, removing a filter which want to unshare WRITE even when > doesn't have any parents will be a problem anyway, so we'll need a new > command to drop filter with a logic like in bdrv_drop_filter in my > series. Do you have an example? Berto