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Mon, 15 Jun 2026 14:24:10 +0000 (GMT) Received: from b35lp69.lnxne.boe (unknown [9.87.84.240]) by smtpav01.wdc07v.mail.ibm.com (Postfix) with ESMTP; Mon, 15 Jun 2026 14:24:10 +0000 (GMT) From: Christian Borntraeger To: mst@redhat.com Cc: eperezma@redhat.com, jasowang@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, sgarzare@redhat.com, shuangyu@yunyoo.cc, stefanha@redhat.com, virtualization@lists.linux.dev, Christian Borntraeger Subject: Re: vhost: fix vhost_get_avail_idx for a non empty ring Date: Mon, 15 Jun 2026 16:24:08 +0200 Message-ID: <20260615142408.64169-1-borntraeger@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <559b04ae6ce52973c535dc47e461638b7f4c3d63.1772441455.git.mst@redhat.com> References: <559b04ae6ce52973c535dc47e461638b7f4c3d63.1772441455.git.mst@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjE1MDE1MCBTYWx0ZWRfX4kOKOUsdn62Q /00GYZASuleTVtIXkuDbgwDV+7nlTSxdLhmfjXnEDOwZphkeDsc5yNcqeYOjo0AQY4CUKdPRaNk v59IksHTAY5najYc84fr6Zys+ciMo94= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjE1MDE1MCBTYWx0ZWRfXxGYz/ntpzeEW VQ0IpQMPtCIG0fa+inikduA5QDgfsJQ5qhKQ4Kmik6MQWgbSBWWV5hoY+zPWdOwYeWfO7xg6yYh rkASTGzuEePJ1NF48p+ZRcx9GBXw0tVPFwHnirO8CfmTlo4JRwzbB8Wu7PNQdp42r8YdPtIud0j MVt29Aty2bQDOFZ7PgmyzrJVd6zankDgEtEImfRryU1Y96gCs2HODtDhdqkX8DK+AyPS+jJ/8ko VUMgUTD7d9ng/rUY0HXLoV0/ofAtMuKpoasRTW5Tm+j8OrL7cKz+Q16k7HFKQEe4aYu2uIfwJhT TnS5RNi6WL9G68VKw/jgs68qV4ETCurGbaUXMg9bBUZ/wGSAemiQ/A9oZz2kJ230FKyj5SULK14 3Zl7YYWOezdl13PO0b1+aZXaOQCg1WFTXCVbPX+X49a3quUsqi+1yJS1jcfxN/g+0B4LTns9XdR 2+4FI9fsa5Z9Wov215A== X-Proofpoint-GUID: JCecQl8GbpHgCG0Czo7MCieaqFs7ZQJ_ X-Authority-Analysis: v=2.4 cv=NuDhtcdJ c=1 sm=1 tr=0 ts=6a300b0d cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=q_tXsGYBvXEQEe6gApwA:9 X-Proofpoint-ORIG-GUID: JCecQl8GbpHgCG0Czo7MCieaqFs7ZQJ_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-15_03,2026-06-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 suspectscore=0 impostorscore=0 clxscore=1011 phishscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606040000 definitions=main-2606150150 Late feedback, but this patch massively improves our uperf latency/bandwidth and cpu consumption significantly for s390. Improvements are all over the place, streaming, transactional (100 byte/2000 byte). Nice fix. Christian