From nobody Sat Apr 11 18:38:40 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1775833618; cv=none; d=zohomail.com; s=zohoarc; b=U7LtKFx2RAmUZU4lz+dbW8y60HBN0y2QmQlDTgPOwA/YsLNqYjCW9V8F0zPuZ+qEH9lhubgjf6p2nlA/dc1CI0Dckv2jxwLD/JNLOUpfPJJp89PU82T3idZbODySlOtZWIHUd2TnWQEmvKEav/cz4IpmSF6AX2veJFW/kpiON+4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1775833618; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=4l9Xr1hbjH1tyACtoEoX12/kjkgfEPIxAbMNxctooNw=; b=FaGeQ0ShnpOy69U3rFYYahx4A7ISX0KZMYaEx9SyuXc3rTky/uCXkqvHZvD2Ubbk49GGg8y0ZAUJnQIV3pcIcQUn1dXoQFouwk/KCQHgVajdRdcD12/rzZwrRKBmCF3Krad8FGCb9+OkCAfyFvCdhSHJgcZFoCfx8S14E/gWZF0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1775833618252381.4151529330379; Fri, 10 Apr 2026 08:06:58 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wBDQH-0006jM-KF; Fri, 10 Apr 2026 11:05:29 -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 1wBDQG-0006g4-H3 for qemu-devel@nongnu.org; Fri, 10 Apr 2026 11:05:28 -0400 Received: from mail-pj1-x102f.google.com ([2607:f8b0:4864:20::102f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1wBDQE-0002IH-VG for qemu-devel@nongnu.org; Fri, 10 Apr 2026 11:05:28 -0400 Received: by mail-pj1-x102f.google.com with SMTP id 98e67ed59e1d1-35d9f68d011so1484103a91.2 for ; Fri, 10 Apr 2026 08:05:25 -0700 (PDT) Received: from ZBMac-LWN10QXKQ0.taila0cd24.ts.net ([104.168.88.121]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35e4131cfacsm3565785a91.10.2026.04.10.08.05.20 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 10 Apr 2026 08:05:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775833524; x=1776438324; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=4l9Xr1hbjH1tyACtoEoX12/kjkgfEPIxAbMNxctooNw=; b=VD2kRAQicJ2apLSjS3dc9r1RBstwYrOwfswsNIpcjB/n10qQ1JuR76/cU74XEGCDu7 V8DwxA0sIMBKlv7j9r2q9eSDWwix2lJ3y1RX0qYkx+prWYVTzpO2ofzpOJNPzRELnQMD iN2rLZtyr1xy4a9cTunTSoX8ilOvn99rXt7WKgBZvD6jX3tTGHR2riLxMIvB3rpImAVl o5/4n6f1gSUn28DamlzgIlXIM5y+l5UMREY1DlrnXRUY+KKw+04XHmSGr9Isc/bpy3/q X32NeN2dt+vnhzg9uL8tZ2CoXsNjAz0ugHAZHeyrPb1ipRUe65rdjRYBm9Y0iwxxT19N XygQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775833524; x=1776438324; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=4l9Xr1hbjH1tyACtoEoX12/kjkgfEPIxAbMNxctooNw=; b=m/ipLvNEXyYgPMlBwS74ns9SeFiVLt893Ydv9Of80FW4cYQqbaZNBKS4TKGRdX3qXh AI2b82SnUkkKUgZF5NEFlAmnOCP+DkYHsQXhvLN+9FFeA+4Ep5rm2xvOkvz0+Q5EVJCc y8/NCkDqp/5VnQNKYAvwCzbSShnpwSsx4TevkXS/+PE7wUG4pCeKzYtJqDY9SJNYwqLc +DXtpvoOJkAsoFRh8ntS5fo+C5nh3KEW4JKXm+9CcxPHoKeujeip056nvD1xb3drhhJc c7P0SLAvcP7InJYma97V9ycmAApD7gR/VJHeuKxS3Vxmsrjfh484L/uY+rAdi7yrvOtv 4vrA== X-Gm-Message-State: AOJu0YzPtMZ2U9YQ4I4WyuQ0KasAKDKZLxCnLBn7/u8H1414cuHeX4la ikpTUBRXqdippLKx9VYwxzu+gVSK4kD55rPjXm0B6OQ0ZAbSbhROzrZHaZs6WEaj X-Gm-Gg: AeBDievRSwkb8Qmky+IU7b4kkHL9dT61vK9oTIJlNDOMnW1h9dxRWWIMYqjk7VuPbj5 07U7SnpYVPsoe9pEtpglIlC/hsBd9Ge8mXh+3ZsUieNK5PBxOHWDrXWJmlWpgoneeIjcA5H3PtH Uv6kjzFlU/4Ow5/AMGQ3JOjLeowtq/gJtnzDIvWoL+NId6GTRupDPe87a+2/0whJnPr05LtvOUJ 4hBGBFugR3pdRsCa9TgjiqFIKFSqnOYM8R6+mv6d9wht/4XgiG004MiupUYDipkGDUThjUm0A81 ZRwwTFMoa9D+EjzsBp8ZizFn8m/jdtmBMnfNnNsoofMiqaBhk4vhcLnn+Leq6tSBNqB79c+xLIX XtgWlwFuX2ODUK18Tp4CBnaH1UNl1P7W0aUVyZHLCApydQupg8l1akTisbjC/nIhzqArQEX90wk 38o8j2kFgmx4tpS/7TiuRKSlOKZpfhrt3R6Zz5GkfVPZ9t8rpLpGWU X-Received: by 2002:a17:90b:4d83:b0:359:8a78:569c with SMTP id 98e67ed59e1d1-35e42827fd2mr3755164a91.25.1775833523456; Fri, 10 Apr 2026 08:05:23 -0700 (PDT) From: Zhang Chen To: qemu-devel , "Dr . David Alan Gilbert" , Eric Blake , Markus Armbruster , "Michael S . Tsirkin" , Stefan Hajnoczi Cc: Zhang Chen Subject: [PATCH V6 04/14] blockdev: Update tracking iothread users with holder name Date: Fri, 10 Apr 2026 23:04:47 +0800 Message-ID: <20260410150457.85190-5-zhangckid@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20260410150457.85190-1-zhangckid@gmail.com> References: <20260410150457.85190-1-zhangckid@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::102f; envelope-from=zhangckid@gmail.com; helo=mail-pj1-x102f.google.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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1775833619579158500 Content-Type: text/plain; charset="utf-8" Currently, x-blockdev-set-iothread changes the AioContext but does not track the IOThread object itself within the block layer. This makes it difficult to manage IOThread reference counting (put/get) during dynamic context switching. Introduce an 'iothread' field to BlockDriverState to store the current assigned IOThread. Update qmp_x_blockdev_set_iothread to perform proper reference counting using iothread_ref/put when moving nodes between an IOThread and the main loop. This ensures 'info iothreads' (holders) accurately reflects the block device attachment state after dynamic migrations. Signed-off-by: Zhang Chen --- blockdev.c | 6 +++++- include/block/block_int-common.h | 5 +++++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/blockdev.c b/blockdev.c index 6e86c6262f..6e20579187 100644 --- a/blockdev.c +++ b/blockdev.c @@ -3683,8 +3683,12 @@ void qmp_x_blockdev_set_iothread(const char *node_na= me, StrOrNull *iothread, goto out; } =20 - new_context =3D iothread_get_aio_context(obj); + new_context =3D iothread_ref_and_get_aio_context(obj, node_name); + bs->iothread =3D obj; } else { + if (bs->iothread) { + iothread_put_aio_context(bs->iothread, node_name); + } new_context =3D qemu_get_aio_context(); } =20 diff --git a/include/block/block_int-common.h b/include/block/block_int-com= mon.h index 147c08155f..6edaf53377 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -1101,6 +1101,8 @@ typedef struct BdrvBlockStatusCache { int64_t data_end; } BdrvBlockStatusCache; =20 +typedef struct IOThread IOThread; + struct BlockDriverState { /* * Protected by big QEMU lock or read-only after opening. No special @@ -1289,6 +1291,9 @@ struct BlockDriverState { =20 /* array of write pointers' location of each zone in the zoned device.= */ BlockZoneWps *wps; + + /* Track the iothread for detach aio context*/ + IOThread *iothread; }; =20 struct BlockBackendRootState { --=20 2.49.0