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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9332BC00144 for ; Mon, 1 Aug 2022 15:55:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id EBE938E0002; Mon, 1 Aug 2022 11:54:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E6DD66B0073; Mon, 1 Aug 2022 11:54:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D35968E0002; Mon, 1 Aug 2022 11:54:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id C1EEA6B0072 for ; Mon, 1 Aug 2022 11:54:59 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 9CB3E1C6311 for ; Mon, 1 Aug 2022 15:54:59 +0000 (UTC) X-FDA: 79751472318.13.9E5B7B3 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf16.hostedemail.com (Postfix) with ESMTP id 14F131800F9 for ; Mon, 1 Aug 2022 15:54:58 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 20959B8124F; Mon, 1 Aug 2022 15:54:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65906C433D7; Mon, 1 Aug 2022 15:54:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659369295; bh=XOKi8iV/dRs/xgoAOdolwetVeYjQ+7ET86DWphR8Rv0=; h=Date:Subject:To:References:From:In-Reply-To:From; b=MkVSPTZNlWd7evEEU/4fh2sjCBNonxX/wFhYRm4kOVZbFrdfQAqoaaGCT7S3Vcj0Q JcN+nAMGlNuFTOq5gk24LwDSSlsz1BE22l6FKFMAzag9ibq+j89XVEYegZopzclx21 7+sV5BMZrn2rp9+YwisQM3Ydp0tM/CAB2N+WldawqbNa7H7cxQjUU377LeQR+73A5j ruufI78YJukWRbOmyv4SQrzIJbOjjcMWvue2uXaYL1qPA+8+kl4kkYoB/Fn79RGG6H Pg//LwAyUhULMVEYMFSBe5EKVBgRwLZYBRyK0giF8u6krwp9etHCQtp1wZke9DN3kP 0VRX0CnEEijpw== Message-ID: Date: Mon, 1 Aug 2022 17:54:53 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: Regarding Virtual address split for a specific process Content-Language: en-US To: "Yeleswarapu, Nagaradhesh" , "linux-mm@kvack.org" References: From: "Vlastimil Babka (SUSE)" In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1659369299; a=rsa-sha256; cv=none; b=dc7PFE1ceNW7qY0Q1U/9n/nzGxKlyVjkF/Wz2SUso9syJwBjhDjdMLhMR6NNExL6LR8c1X 84JOy3wn+PivQL+AXtR1pQ4QNFIzCqs3g87XQj8tEJKbSalHGW2udaQ7N9f6/udHDQMnCC YJyzLEQtkY1iYECyzjKCSNmCgDsUxJ8= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=MkVSPTZN; spf=pass (imf16.hostedemail.com: domain of vbabka@kernel.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=none) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1659369299; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=EV8S1Cxq8k4p1efcmTRdK49W78DCcZRDE+76NhhhUAs=; b=oBYbvtCBHOtNmLrIjQ/VwWJ1I54ipEVvzCvyndd67//+4tTQF2yW16b5VN+f0sfQEpwbwE fWt4izhnOKW/MSyzjGpSI8fN0G+Sm1N9FdkS88m9BYz3JVH6AkzCzN7YfNVFVur6ZUo/Fn Et1QSTIMJLWwktJ4YGik4slVjE02RBM= X-Stat-Signature: 4ik1qkg8mf8tbkntkghcxthbpgyk7sbm X-Rspamd-Queue-Id: 14F131800F9 X-Rspam-User: Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=MkVSPTZN; spf=pass (imf16.hostedemail.com: domain of vbabka@kernel.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=none) header.from=kernel.org X-Rspamd-Server: rspam03 X-HE-Tag: 1659369298-350014 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 8/1/22 08:45, Yeleswarapu, Nagaradhesh wrote: > [AMD Official Use Only - General] > > Hi, > > From the config options(CONFIG_VMSPLIT_3G/2G/1G), looks like 3/1 or 2/2 or 1/3 split is for all the user space processes. Yeah, but only for 32bit architectures. > Is it possible to do 2/2 split for a specific process and let all the other processes use default 3/1 (user/kernel) VA split? No, it's hardcoded in the kernel compilation. What would be the use case? > Thanks, > Nagaradhesh