On 1/17/2020 2:26 PM, Sean Christopherson wrote:
TIF_FPU_NEED_LOAD can be set any time
control is transferred out of KVM, e.g. via IRQ->softirq, not just when
KVM is preempted.
Hi Sean,
Is this just because kernel_fpu_begin() is called during softirq? I saw
the dump trace in 3/4 message, but didn't find out clue.
Could I ask where kernel_fpu_begin() is called? Or is this just a
"possible" thing?
Because I just want to make sure that, kvm can use this flag to cover
all preempt/softirq/(other?) cases?
Thanks,
Jing
