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Tue, 1 Apr 2025 20:14:50 +0000 (GMT) Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Tue, 01 Apr 2025 15:14:49 -0500 From: Wen Xiong To: Thomas Gleixner Cc: linux-kernel@vger.kernel.org, gjoyce@linux.ibm.com, linux-pci@vger.kernel.org, Bjorn Helgaas , linux-scsi@vger.kernel.org Subject: Re: [PATCH 1/1] genirq/msi: Dynamic remove/add stroage adapter hits EEH In-Reply-To: <87wmc9wg2z.ffs@tglx> References: <87wmc9wg2z.ffs@tglx> Message-ID: X-Sender: wenxiong@linux.ibm.com Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 97ggxYno2G7sRr-B88pD6kEeaU540Xda X-Proofpoint-GUID: 97ggxYno2G7sRr-B88pD6kEeaU540Xda X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-01_08,2025-04-01_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=995 impostorscore=0 malwarescore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 phishscore=0 bulkscore=0 spamscore=0 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504010122 On 2025-03-28 06:27, Thomas Gleixner wrote: > You are completely missing the point. This is not a problem restricted > to PCI/MSI interrupts. > Thanks for all suggestions! I will investigate more and check if we can fix it in device driver. Looks several device drivers in kernel use two kernel APIs to set/clean IRQ_NO_BALACING status for a given irq. irq_set_status_flags(irq, IRQ_NO_BALANCING); irq_clear_status_flags(irq, IRQ_NO_BALANCING); With these two APIs, device driver can decide if using kernel irq balance or setting irq affinity by driver itself? So we can set/clear IRQ_NO_BALANCING during reset. Thanks, Wendy