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Tue, 21 Apr 2026 13:10:27 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5a4187ebe3dsm3858063e87.74.2026.04.21.13.10.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2026 13:10:26 -0700 (PDT) Date: Tue, 21 Apr 2026 23:10:22 +0300 From: Dan Carpenter To: Piotr Zarycki 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: kvm@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: <20260421172953.191345-1-piotr.zarycki@gmail.com> On Tue, Apr 21, 2026 at 07:29:53PM +0200, Piotr Zarycki wrote: > Replace the open-coded NOP loop with udelay() which was added to KVM > selftests in commit 6b878cbb87bf ("KVM: selftests: Add guest udelay() > utility for x86"). The NOP loop is CPU speed dependent while udelay() > provides a deterministic delay regardless of host CPU frequency. > > Signed-off-by: Piotr Zarycki > --- How did you test this? regards, dan carpenter