Re: [PATCH v3 00/12] KVM: selftests: Add more syscall wrappers, fix hardware_disable_test
Yosry Ahmed <[email protected]> Fri, 31 Jul 2026 14:35:16 -0700
| Newsgroups | dev.linux.lists.kvmarm,org.infradead.lists.linux-arm-kernel,org.kernel.vger.kvm,org.kernel.vger.linux-kernel |
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| Message-ID | <CAO9r8zO-eCz-4Gpa_FUjRKPaDj82PP7et7KON4S5QfhRU2J-Ug@mail.gmail.com> |
On Fri, Jul 31, 2026 at 12:56 PM Sean Christopherson <[email protected]> wrote: > > Third time's a charm. Sorry for the spam. > > Buried in the middle of this is a fix for the hardware_disable_test where > it can end up with a runtime of multiple minutes when running a preemptible > kernels on a large NUMA system. Turns out my analysis/guess in v1 was wrong; > the problem isn't direct CPU contention, it's that letting the workers do any > amount of "real" work on any CPUs leads to pthread_create() slowdowns from > the perspective of the caller. How long does the test take to run with this series?