Re: [PATCH v13 18/21] KVM: x86/xen: don't block on pfncache locks in kvm_xen_set_evtchn_fast()

On 19/02/2024 22:04, Sean Christopherson wrote: On Thu, Feb 15, 2024, Paul Durrant wrote: From: Paul Durrant As described in [1] compiling with CONFIG_PROVE_RAW_LOCK_NESTING shows that kvm_xen_set_evtchn_fast() is blocking on pfncache locks in IRQ context. There is only actually blocking with

Re: [PATCH v13 18/21] KVM: x86/xen: don't block on pfncache locks in kvm_xen_set_evtchn_fast()

On Thu, Feb 15, 2024, Paul Durrant wrote: > From: Paul Durrant > > As described in [1] compiling with CONFIG_PROVE_RAW_LOCK_NESTING shows that > kvm_xen_set_evtchn_fast() is blocking on pfncache locks in IRQ context. > There is only actually blocking with PREEMPT_RT because the locks will > turne

[PATCH v13 18/21] KVM: x86/xen: don't block on pfncache locks in kvm_xen_set_evtchn_fast()

From: Paul Durrant As described in [1] compiling with CONFIG_PROVE_RAW_LOCK_NESTING shows that kvm_xen_set_evtchn_fast() is blocking on pfncache locks in IRQ context. There is only actually blocking with PREEMPT_RT because the locks will turned into mutexes. There is no 'raw' version of rwlock_t