From nobody Tue Feb 10 02:49:49 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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 ARC-Seal: i=1; a=rsa-sha256; t=1603372067; cv=none; d=zohomail.com; s=zohoarc; b=IRzcfEtcOW3QBPYfjR1UtsqvThs+bvAk7jNFN2i9BxBpLJnBLUi0oK86yTTQBRcuA8wO7n6PLOHy7suxifEa3I4NMMXUkBOm4S3LB9uCpJy9/4ukPjmqEhe9Q3uRACRLonQLfn+h5DUUmVzUX1d0VMHeqxBhjfdPbCjXtZT/BdQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1603372067; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=boKpysI49ZVti/pjtsxtBQ5Q2ezXBVJEdAmYkhPNphU=; b=a6nsLBjwP7HwQmzn/STwfIwaQx2wNe+TAEYQtB0DlhETNjfT1E0BAgtMJCS+/Qq7VDNHqCf22oAsczAE3xtAaFICpgi3fkDJDMhJLYsLD+qK9Umeq5jo7c1lEGf6IZXtnmkk03v87RrXz12YMJ8ayo3EqcGlqoJyOpmxK3po41E= ARC-Authentication-Results: i=1; mx.zohomail.com; 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 16033720675931018.2664038282539; Thu, 22 Oct 2020 06:07:47 -0700 (PDT) Received: from localhost ([::1]:54574 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kVaJm-00087q-4J for importer@patchew.org; Thu, 22 Oct 2020 09:07:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57164) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kVaG2-0004tQ-5S; Thu, 22 Oct 2020 09:03:54 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:5203 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kVaFx-0000g6-MB; Thu, 22 Oct 2020 09:03:53 -0400 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 134122B5CC07D50BF9A1; Thu, 22 Oct 2020 21:03:38 +0800 (CST) Received: from localhost (10.174.184.155) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.487.0; Thu, 22 Oct 2020 21:03:29 +0800 From: Jiahui Cen To: , , , Subject: [PATCH v3 1/9] block-backend: introduce I/O rehandle info Date: Thu, 22 Oct 2020 21:02:55 +0800 Message-ID: <20201022130303.1092-2-cenjiahui@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201022130303.1092-1-cenjiahui@huawei.com> References: <20201022130303.1092-1-cenjiahui@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.174.184.155] X-CFilter-Loop: Reflected 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=45.249.212.190; envelope-from=cenjiahui@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/22 09:03:38 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-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: cenjiahui@huawei.com, zhang.zhanghailiang@huawei.com, qemu-block@nongnu.org, stefanha@redhat.com, fangying1@huawei.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" The I/O hang feature is realized based on a rehandle mechanism. Each block backend will have a list to store hanging block AIOs, and a timer to regularly resend these aios. In order to issue the AIOs again, each block AIOs also need to store its coroutine entry. Signed-off-by: Jiahui Cen Signed-off-by: Ying Fang --- block/block-backend.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/block/block-backend.c b/block/block-backend.c index ce78d30794..b8367d82cc 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -35,6 +35,18 @@ =20 static AioContext *blk_aiocb_get_aio_context(BlockAIOCB *acb); =20 +/* block backend rehandle timer interval 5s */ +#define BLOCK_BACKEND_REHANDLE_TIMER_INTERVAL 5000 + +typedef struct BlockBackendRehandleInfo { + bool enable; + QEMUTimer *ts; + unsigned timer_interval_ms; + + unsigned int in_flight; + QTAILQ_HEAD(, BlkAioEmAIOCB) re_aios; +} BlockBackendRehandleInfo; + typedef struct BlockBackendAioNotifier { void (*attached_aio_context)(AioContext *new_context, void *opaque); void (*detach_aio_context)(void *opaque); @@ -95,6 +107,8 @@ struct BlockBackend { * Accessed with atomic ops. */ unsigned int in_flight; + + BlockBackendRehandleInfo reinfo; }; =20 typedef struct BlockBackendAIOCB { @@ -350,6 +364,7 @@ BlockBackend *blk_new(AioContext *ctx, uint64_t perm, u= int64_t shared_perm) qemu_co_queue_init(&blk->queued_requests); notifier_list_init(&blk->remove_bs_notifiers); notifier_list_init(&blk->insert_bs_notifiers); + QLIST_INIT(&blk->aio_notifiers); =20 QTAILQ_INSERT_TAIL(&block_backends, blk, link); @@ -1392,6 +1407,10 @@ typedef struct BlkAioEmAIOCB { BlkRwCo rwco; int bytes; bool has_returned; + + /* for rehandle */ + CoroutineEntry *co_entry; + QTAILQ_ENTRY(BlkAioEmAIOCB) list; } BlkAioEmAIOCB; =20 static AioContext *blk_aio_em_aiocb_get_aio_context(BlockAIOCB *acb_) --=20 2.19.1