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[72.235.129.167]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-710e5a43e48sm6270789b3a.98.2024.08.13.12.54.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Aug 2024 12:54:38 -0700 (PDT) Sender: Tejun Heo Date: Tue, 13 Aug 2024 09:54:37 -1000 From: Tejun Heo To: Aboorva Devarajan Cc: void@manifault.com, linux-kernel@vger.kernel.org Subject: Re: [sched_ext/for-6.11]: Issue with BPF Scheduler during CPU Hotplug Message-ID: References: <8cd0ec0c4c7c1bc0119e61fbef0bee9d5e24022d.camel@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Hello, On Sat, Aug 10, 2024 at 11:54:24PM +0530, Aboorva Devarajan wrote: ... > Sorry for the delayed response, I just got sometime on the machine to > run this test. > > I applied the patchset on the latest sched-ext (for-next) branch and > tested it, but the issue still persists. I did the test on a PowerPC > system, as it is easier to reproduce the issue there compared to x86. Bummer. ... > I'll see if I can collect more details, and if there's anything else > you'd want me check, please let me know. Can you trigger sysrq-t when the system is stuck? Also, can you see whether the problem is reproducible on x86 w/ the wq changes applied? Thanks. -- tejun