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[195.150.55.226]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ba538429115sm464634766b.15.2026.04.22.02.13.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Apr 2026 02:13:23 -0700 (PDT) Date: Wed, 22 Apr 2026 11:13:33 +0200 From: Piotr Zarycki To: Dan Carpenter Cc: kvm@vger.kernel.org, seanjc@google.com, pbonzini@redhat.com, shuah@kernel.org, vkuznets@redhat.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: Re: [PATCH] KVM: selftests: hyperv_tlb_flush: replace NOP loop with udelay() Message-ID: References: <20260421172953.191345-1-piotr.zarycki@gmail.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Apr 21, 2026 at 11:10:22PM +0300, Dan Carpenter wrote: > > How did you test this? > I built the test using: make -C tools/testing/selftests/kvm ARCH=x86_64 x86/hyperv_tlb_flush And ran it 100 times to verify it passes consistently results: 100/100 passed, 0 failed average time: 466ms For comparison, the original NOP loop averaged ~537ms on the same machine.