From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 30DDC3812DB for ; Fri, 24 Jul 2026 11:05:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784891138; cv=none; b=BDWmUaxK9zWx00NFOmiVqQsb2VTjk3DxhMSHU+gMvUrnXjjRmGW4UsUz7K64bewk4Qn5H3YVvoK5D8dxUE+dnBDz+wdOP2D8bM3Gc36aIWcP3o/T+F2WXj7iWgamayaTdEUEo+Jy3q+Fgn9UL8FIBeKO1+wErg8CNImS5aQ7L1w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784891138; c=relaxed/simple; bh=p85OlIoOhyQBaALtVBjgPbmZHMCuTiXnsjI3WLwwxE0=; h=From:Subject:To:Cc:In-Reply-To:References:Content-Type:Date: Message-Id; b=mVcFVmyMQdDnJWCPwhzxcJLSObLafodP4el7J/aPsLbABDxvuvXbtuH+aaL1dk+eGIwCeYCJY+uTt4SgF5BAUjPxK392wRUCrOpni26VKy3nX81VcJsT9DweltzuyowFhGd5jMspQh7osKZsVSPoISQR0yGMyQFqS0pqtWVs87w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DfUz6O6Q; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DfUz6O6Q" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B7BF11F031D8; Fri, 24 Jul 2026 11:05:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784891136; bh=okA/Ise7DoMO9vuKz3S8mLBuQ2zpaXql/yCgn1pUV4Y=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=DfUz6O6QBmwdIdRDqk5w9BstoZDL3WX8QCPZ996NEd/wQnJKtrOOmgi5EbVGy7BVW VcQtbEeS70EXOf1r0HE75OS1El21mH1Ob6JtFlkow5+o3jfqsPwoap3vpoIbL97chG VM9l7/45bii5RjkBfMoRkn2R8u1qmhmYylcXEwYmDVN/ux53G4kIvo95hogxlJus7S HWVJTRUHDAxAcKJijGI14ywo9jE68MG+Wujml94/0vtDxHET4WhLJ/Nc9LAZW6nF6G D4Zm+6bSfRjENKhJPgFGTSdoMm7cLy/I0SUK5SDF9x2/z2NW9cwEWQ124xeyVyD0Wl QY2sdVvEabnCg== From: sashiko-bot@kernel.org Subject: Re: [PATCH v3 2/2] s390/kvm: Add tracepoint for DIAG 9c directed yield operations Reply-To: sashiko-reviews@lists.linux.dev To: "Ciunas Bennett" Cc: "Vasily Gorbik" , "Alexander Gordeev" , "Heiko Carstens" , linux-s390@vger.kernel.org In-Reply-To: <20260724103959.14861-3-ciunas@linux.ibm.com> References: <20260724103959.14861-1-ciunas@linux.ibm.com> <20260724103959.14861-3-ciunas@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 24 Jul 2026 11:05:35 +0000 Message-Id: <20260724110535.B7BF11F031D8@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > Add a new tracepoint, kvm_s390_diag_9c, to provide visibility into > directed yield operations. The tracepoint records: >=20 > - Source vCPU context via the standard vCPU tracepoint fields > - Target vCPU ID > - Target physical CPU number > - Operation result (done, ignored, or yield forwarded) >=20 > This improves observability of vCPU scheduling behaviour and helps > diagnose performance issues related to directed yields in virtualised > s390 environments. >=20 > Signed-off-by: Ciunas Bennett Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260724103959.1486= 1-1-ciunas@linux.ibm.com?part=3D2