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 Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C2006C5AC7A for ; Fri, 7 Aug 2026 14:04:51 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wsLBF-0001ui-Gc; Fri, 07 Aug 2026 10:04:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wsLB9-0001tH-Oo for qemu-devel@nongnu.org; Fri, 07 Aug 2026 10:04:09 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wsLB6-0006og-VG for qemu-devel@nongnu.org; Fri, 07 Aug 2026 10:04:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1786111443; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=hboCjRvgjfoG+tH8rkE7D7nx7L/zzLPD6WXJAXxlz2Q=; b=d02R4yQAY2Te5Z1t9PGlM+yj8VRSomiLQUg00AahIYniZ28yXS9SypYHaUo4CvqqwnZrE0 ezbx/Pcg3jMhpIFrCGYmESGfvA29AbJUwh7HCyQuT3F683FkIUnPjR0TnhrGfaoxBmj8gi W/9aAovyamvJI9LA8++/+wZz0XZHRuk= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-77-pk6jyUDyOAaxn_XM5EQpow-1; Fri, 07 Aug 2026 10:04:01 -0400 X-MC-Unique: pk6jyUDyOAaxn_XM5EQpow-1 X-Mimecast-MFC-AGG-ID: pk6jyUDyOAaxn_XM5EQpow_1786111440 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 71F4A1956094; Fri, 7 Aug 2026 14:04:00 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.44.22.7]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id F2C5B19560AB; Fri, 7 Aug 2026 14:03:59 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id A065521E6920; Fri, 07 Aug 2026 16:03:57 +0200 (CEST) From: Markus Armbruster To: Zhang Chen Cc: qemu-devel , Eric Blake , "Michael S . Tsirkin" , Stefan Hajnoczi , Paolo Bonzini , 'Daniel P . =?utf-8?Q?Berrang=C3=A9'?= , Jason Wang Subject: Re: [PATCH V11 06/15] monitor: track IOThread users with QOM paths In-Reply-To: <20260806202531.243806-7-zhangckid@gmail.com> (Zhang Chen's message of "Fri, 7 Aug 2026 04:25:15 +0800") References: <20260806202531.243806-1-zhangckid@gmail.com> <20260806202531.243806-7-zhangckid@gmail.com> Date: Fri, 07 Aug 2026 16:03:57 +0200 Message-ID: <87mruyni2a.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 0 X-Spam_score: -0.0 X-Spam_bar: / X-Spam_report: (-0.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.238, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Zhang Chen writes: > Acquire the shared monitor IOThread AioContext once, using the monitor > QOM path as the holder, and reuse the stored context for later > operations. This describes what the patch does, but not why it is useful. > Release the holder during global cleanup and dynamic QMP monitor > deletion to provide an explicit acquire/release lifecycle. This at least provides a clue: "to provide ..." > Signed-off-by: Zhang Chen