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 1D542CD6E49 for ; Fri, 29 May 2026 07:05:28 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wSrGu-0000W5-MB; Fri, 29 May 2026 03:04:44 -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 1wSrGl-0000VX-Qw for qemu-devel@nongnu.org; Fri, 29 May 2026 03:04:35 -0400 Received: from [115.124.30.124] (helo=out30-124.freemail.mail.aliyun.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wSrGj-0008B9-2e for qemu-devel@nongnu.org; Fri, 29 May 2026 03:04:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1780038250; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=2nCwX2iqKB9bsAFbLUnoxcGES800omXU8YiCiCVJoBQ=; b=nQd4ym59/znPsoCOR+89ufYH7S5eNL/v/p+SNi3DhIRMCzmbaGS5REoNuGJ97MxmTvMGlEOnzOGcjU3rkotShURNDQGjPLGnOhc9QpTCYBpNa2ndVRbPHAsq+lIra6+LsMKFVabcNq3SiH+zn5JHtyVV7mmgEVSxmQh2+7LRXCk= X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R291e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=maildocker-contentspam033045133197; MF=guobin@linux.alibaba.com; NM=1; PH=DS; RN=4; SR=0; TI=SMTPD_---0X3odXVr_1780038249; Received: from localhost(mailfrom:guobin@linux.alibaba.com fp:SMTPD_---0X3odXVr_1780038249 cluster:ay36) by smtp.aliyun-inc.com; Fri, 29 May 2026 15:04:10 +0800 From: Bin Guo To: qemu-devel@nongnu.org Cc: Peter Xu , Fabiano Rosas , Li Zhijian Subject: [PATCH 0/2] migration/rdma: fix blocking readv and zero-page accounting Date: Fri, 29 May 2026 15:04:06 +0800 Message-ID: <20260529070408.92651-1-guobin@linux.alibaba.com> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 115.124.30.124 (deferred) Received-SPF: pass client-ip=115.124.30.124; envelope-from=guobin@linux.alibaba.com; helo=out30-124.freemail.mail.aliyun.com X-Spam_score_int: -166 X-Spam_score: -16.7 X-Spam_bar: ---------------- X-Spam_report: (-16.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5 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 This small series fixes two independent issues in the RDMA migration code path that were noticed while reviewing the QIOChannelRDMA behavior and migration statistics during RDMA live migration. Patch 1 makes QIOChannelRDMA's readv honor the blocking flag set via io_set_blocking(). Previously, in blocking mode it returned immediately when the receive buffer could not satisfy the request, diverging from other QIOChannel implementations. The fix loops on qemu_rdma_exchange_recv() while the channel is in blocking mode, and removes the now-stale XXX comments about unimplemented blocking support. Patch 2 fixes transfer accounting for the RDMA zero page compression path. When a zero page is detected, an RDMA_CONTROL_COMPRESS message is sent instead of an RDMA Write, but mig_stats.rdma_bytes and ram_transferred_add() were never updated, so migration progress and bandwidth were undercounted. The patch accounts the wire cost (RDMAControlHeader + RDMACompress payload), matching how the non-RDMA path accounts for zero page markers. Both patches are small and self-contained; no behavior change is expected outside the RDMA migration path. Bin Guo (2): migration/rdma: honor blocking mode in QIOChannelRDMA readv migration/rdma: account transferred bytes for zero page compression migration/rdma.c | 62 ++++++++++++++++++++++-------------------------- 1 file changed, 29 insertions(+), 33 deletions(-) -- 2.50.1 (Apple Git-155)