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(p200300e58729400029eb6d9d321439d2.dip0.t-ipconnect.de. [2003:e5:8729:4000:29eb:6d9d:3214:39d2]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a72aaf18c99sm308790966b.2.2024.07.01.01.25.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Jul 2024 01:25:38 -0700 (PDT) Message-ID: <098c5197-bd3e-439a-ae4c-72e05a06a9a7@suse.com> Date: Mon, 1 Jul 2024 10:25:37 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] x86/xen/time: Reduce Xen timer tick To: Frediano Ziglio , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: "H. Peter Anvin" , x86@kernel.org, Dave Hansen , Borislav Petkov , Ingo Molnar , Thomas Gleixner , Boris Ostrovsky References: <20240619104015.30477-1-frediano.ziglio@cloud.com> Content-Language: en-US From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= In-Reply-To: <20240619104015.30477-1-frediano.ziglio@cloud.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 19.06.24 12:40, Frediano Ziglio wrote: > Current timer tick is causing some deadline to fail. > The current high value constant was probably due to an old > bug in the Xen timer implementation causing errors if the > deadline was in the future. > > This was fixed in Xen commit: > 19c6cbd90965 xen/vcpu: ignore VCPU_SSHOTTMR_future > > Usage of VCPU_SSHOTTMR_future in Linux kernel was removed by: > c06b6d70feb3 xen/x86: don't lose event interrupts > > Signed-off-by: Frediano Ziglio Reviewed-by: Juergen Gross Juergen