From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1A1E2E77173 for ; Sat, 7 Dec 2024 01:58:13 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Y4rr34ndTz2xl5; Sat, 7 Dec 2024 12:58:11 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=150.107.74.76 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1733536691; cv=none; b=mHOvFy1r9iGEO/5GF12MV08+FZ2x7wZE0hHl391IMsNOq9GCacSJZef043i+G4EoyXUR5rY+F93QPOvGN4jOJ50uOeBbBAfZKc34YH2JQnpmj+2Zg31jaVs2dPsv84V4e66uxzeXODjOkX2BoUcLzZej2q4U5J1lx90olDUtHOJTKbB95f5jHeaF3M7iQtRbf3Ei95pmIszgZ3Yovm50rHW+xVoNOOhWpOEJea4A0aKCjjSE80FvcBSMdbtQTQE+gRv94oVnUzV96pCF3V0g+YB5y3bnkp5mnQCbUyQ997u+Ux/PvnwPUr/uCM3ylmckmyfhdGGcIZ0NxBXYsge6+g== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1733536691; c=relaxed/relaxed; bh=p1eNG/xpa51nZjmSN+gRlYo7HJmXnyymXzX8PBTf02k=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=D85gHzrFTdC9VVucTlzvOlwVIMGlIyVbs0MFuSZjcHr27AVaLcowXzwd4UTJ5uO3IhEsZYq0Xc7iO14NmjbxlNtRJVITq+quP3/+ubIHomjN0b/J8NKiRWGHf+JPIE0Vlh77eRAZd/ILiYQORO6mTZmVag4FZ9sdbErAHWa6m/rM0boa6QbvTkZnSsBf7UNvGxNJ1/f8FPuqvOiExSn0qxkQE7Tu4QFs1eA2Jvv4RQ1OaUbePnIaPiPehjnHyf60jMtOWuO+X9Xlzzn6f3ri4PqCSrW6rKzdFb5yXymJzFaApxEGiykh4j9omTpQAYj9dE3M015QkST/V3C/PfolQg== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=dYDmt/t7; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=dYDmt/t7; dkim-atps=neutral Received: from mail.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Y4rr10kYfz2xbQ for ; Sat, 7 Dec 2024 12:58:09 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ellerman.id.au; s=201909; t=1733536683; bh=p1eNG/xpa51nZjmSN+gRlYo7HJmXnyymXzX8PBTf02k=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=dYDmt/t7TqfzspS1P/2KYLIi5Lp6All4oWl3qkpgyMZ8YszX4xqefgJ2LwBgGIfYf 6ilaHmjKS3PM+dZs3wQq6j7BqxCIu2jRIOJTIDN3YZlhqR2ltyB9fiq8uXUx1DR/R1 vkkwEHWO6wbPENd6ZsxTodYoghI5izhG6JT5f3PJ6vzyg4xuGoZmiQbMJ4fJZOyx4p GOlp1o0eIheb2YxVPIrBPL8WmG5R5qvgC00xstoxQEpQwAT4K2iaxI1tlA0xKeljmz 5Y05rTclOGNXhfRQDfRown3VboOgc5J7M7eDIdNXdlo9uBK7Oxy+9XCU6lmG7x6dPg cFKC6C4h3ZkbQ== Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Y4rqv3Dyfz4wcy; Sat, 7 Dec 2024 12:58:03 +1100 (AEDT) From: Michael Ellerman To: Avnish Chouhan , linuxppc-dev@lists.ozlabs.org Cc: brking@linux.ibm.com, meghanaprakash@in.ibm.com, sourabhjain@linux.ibm.com, maddy@linux.ibm.com, Avnish Chouhan Subject: Re: [PATCH v2] powerpc: increase MIN RMA size for CAS negotiation In-Reply-To: <20241206065545.14815-1-avnish@linux.ibm.com> References: <20241206065545.14815-1-avnish@linux.ibm.com> Date: Sat, 07 Dec 2024 12:58:00 +1100 Message-ID: <87ser05k5z.fsf@mpe.ellerman.id.au> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Avnish Chouhan writes: > Change RMA size from 512 MB to 768 MB which will result > in more RMA at boot time for PowerPC. Did you consider just increasing it to 1GB? It's possible there's some folks running LPARs with less than 1GB, but they are unlikely to continue doing so by the time this change trickles into distros. To be supported modern RHEL requires 2GB minimum RAM anyway. Can you also describe the behaviour users will see when they configure an LPAR with less than 768MB of RAM. cheers