Re: [PATCH] KVM: selftests: memslot_perf_test: make host wait timeout configurable

[Maciej S. Szmigiero]

On 7.04.2026 12:21, Mayuresh Chitale wrote:
> On Tue, Apr 7, 2026 at 4:30 AM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
> > On Thu, Apr 02, 2026, Maciej S. Szmigiero wrote:
> > > On 2.04.2026 12:29, Mayuresh Chitale wrote:
> > > > When memslot_perf_test is run on qemu, sometimes the RW subtest fails
> > > > due to sigalarm, indicating that the guest sync did not finish within
> > > > the expected duration of 10 seconds. Since the current timeout value is
> > > > itself a bump up from the original 2s, making the host timeout value
> > > > configurable via a new command line parameter. Now the test can be
> > > > invoked with '-a' argument to run the test with a suitable host timeout
> > > > value.
> > > >
> > > > Signed-off-by: Mayuresh Chitale <mayuresh.chitale@xxxxxxxxxxxxxxxx>
> > > > ---
> > >
> > > Out of curiosity: which KVM-enabled setup takes more than 10 seconds
> > > to run that RW test?
> >
> > Hmm, I assume "run on qemu" means running in a VM that's fully emulated by QEMU?
> > That would probably explain why it's so slow?
>
> Yes. thats correct. I can update the commit message to reflect that.
> >

Thanks for info Mayuresh and Sean.

I thought QEMU has only rudimentary SVM emulation, but apparently it's enough for
KVM selftests to run.

Thanks,
Maciej