This is not visible since we need a very high load to reproduce. We have tried a lot but can't achieve the desired load On our kernel with less load, it is not reproducible as well. -----Original Message----- From: Wei Liu <wei.liu@xxxxxxxxxx> Sent: Sunday, August 22, 2021 6:25 PM To: David Mozes <david.mozes@xxxxxxx> Cc: David Moses <mosesster@xxxxxxxxx>; Wei Liu <wei.liu@xxxxxxxxxx>; Michael Kelley <mikelley@xxxxxxxxxxxxx>; תומר אבוטבול <tomer432100@xxxxxxxxx>; linux-hyperv@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx Subject: Re: [PATCH] x86/hyper-v: guard against cpu mask changes in hyperv_flush_tlb_others() On Thu, Aug 19, 2021 at 07:55:06AM +0000, David Mozes wrote: > Hi Wei , > I move the print cpumask to other two places after the treatment on the empty mask see below > And I got the folwing: > > > Aug 19 02:01:51 c-node05 kernel: [25936.562674] Hyper-V: ERROR_HYPERV2: cpu_last= > Aug 19 02:01:51 c-node05 kernel: [25936.562686] WARNING: CPU: 11 PID: 56432 at arch/x86/include/asm/mshyperv.h:301 hyperv_flush_tlb_others+0x23f/0x7b0 > > So we got empty on different place on the code . > Let me know if you need further information from us. > How you sagest to handle this situation? > Please find a way to reproduce this issue with upstream kernels. Thanks, Wei.
