From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (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 7876332D0CD for ; Tue, 6 Jan 2026 14:47:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767710824; cv=none; b=B3LUsiOAbYW6YwGg3f25d801krZOtspBKXckbRX4vHtLkGWVvpx2CR3Gs/jtmgDYFLw6PMb/LF/93Yg5K9gWpPqXvg9krB9/JDFlLBZlxxS/uLjcobPhv8Vv+AuEbPpdUG7GE1cetUfUjjEmbOGE6ofn34b+9jw/m6V21k/asX4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767710824; c=relaxed/simple; bh=Xk2bnvJSV0QrXsHs/KVMrgk4P6LaAU+xoDDrMxo4W50=; h=Date:From:To:CC:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=cTdwMZmKauQIr+2HJb+1cU1pQIdYVSdp+AYjAlWSHUHvZMBcptg2x4iH8s7fLtyLLJWZZ35xMs65dEZpHMJVefqtArYyHgQ0Km0PBkTEVRuF9mkIqIKNzPaoNuoU1lBnWtISSpUnX7UwoBfvAdGfA8WTHgLw+LBsGYPQSykrnhY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.224.107]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4dlvBm5pMGzHnHNS; Tue, 6 Jan 2026 22:46:56 +0800 (CST) Received: from dubpeml100005.china.huawei.com (unknown [7.214.146.113]) by mail.maildlp.com (Postfix) with ESMTPS id 264D340570; Tue, 6 Jan 2026 22:47:01 +0800 (CST) Received: from localhost (10.195.245.156) by dubpeml100005.china.huawei.com (7.214.146.113) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.36; Tue, 6 Jan 2026 14:46:59 +0000 Date: Tue, 6 Jan 2026 14:46:58 +0000 From: Jonathan Cameron To: Ben Horgan CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v2 36/45] arm_mpam: resctrl: Update the rmid reallocation limit Message-ID: <20260106144658.00006870@huawei.com> In-Reply-To: <20251219181147.3404071-37-ben.horgan@arm.com> References: <20251219181147.3404071-1-ben.horgan@arm.com> <20251219181147.3404071-37-ben.horgan@arm.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: lhrpeml100011.china.huawei.com (7.191.174.247) To dubpeml100005.china.huawei.com (7.214.146.113) On Fri, 19 Dec 2025 18:11:38 +0000 Ben Horgan wrote: > From: James Morse > > resctrl's limbo code needs to be told when the data left in a cache is > small enough for the partid+pmg value to be re-allocated. > > x86 uses the cache size divided by the number of rmid users the cache may > have. Do the same, but for the smallest cache, and with the number of > partid-and-pmg users. > > Querying the cache size can't happen until after cacheinfo_sysfs_init() has > run, so mpam_resctrl_setup() must wait until then. > > Signed-off-by: James Morse > Signed-off-by: Ben Horgan Reviewed-by: Jonathan Cameron