From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay5.mymailcheap.com (relay5.mymailcheap.com [159.100.248.207]) (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 915F32C18E; Fri, 29 Mar 2024 08:56:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.100.248.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711702587; cv=none; b=rPCpFVWXCDtoWLSMsncVGSTraO7rz6ET2kGRbKLndJGoAi3XiA6Z1DMGZqOkK8lP893O8kZP2AgxPtO4NNB2mxk9mrUh9TcwzgLH/aIFiz6+b7+k+kv69wAn5u07bnllyRkuPzKh6dS80iyE5ILjdE3EyVFFc6O4BX8ryahiTpE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711702587; c=relaxed/simple; bh=BhxWWD1/6hpzW0ZuCB47ZyZpGCd1UhWx6YWmIPxtGBA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=uVs/kv4rs185rjp/t4GFEubJngwMFrKFlgzVK9CLWs730IZSatCvYpOvyeo/8OW7yS7z0x7rjXmvHwDiFSPEnSSmhg2bGDTh3UuXoT4NB1Hys55G3qLhzJ1cIvGEhHKgzzR7dlaxWar+QBAVvEq5xW7Rf58rOfKbdtWqy4aHuzw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=pavinjoseph.com; spf=pass smtp.mailfrom=pavinjoseph.com; dkim=pass (1024-bit key) header.d=pavinjoseph.com header.i=@pavinjoseph.com header.b=GN6A20EK; arc=none smtp.client-ip=159.100.248.207 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=pavinjoseph.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pavinjoseph.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=pavinjoseph.com header.i=@pavinjoseph.com header.b="GN6A20EK" Received: from relay2.mymailcheap.com (relay2.mymailcheap.com [217.182.113.132]) by relay5.mymailcheap.com (Postfix) with ESMTPS id B23F3260DF; Fri, 29 Mar 2024 08:56:23 +0000 (UTC) Received: from nf1.mymailcheap.com (nf1.mymailcheap.com [51.75.14.91]) by relay2.mymailcheap.com (Postfix) with ESMTPS id E9E573E870; Fri, 29 Mar 2024 09:56:15 +0100 (CET) Received: from mail20.mymailcheap.com (mail20.mymailcheap.com [51.83.111.147]) by nf1.mymailcheap.com (Postfix) with ESMTPSA id AC4664007F; Fri, 29 Mar 2024 08:56:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=pavinjoseph.com; s=default; t=1711702575; bh=BhxWWD1/6hpzW0ZuCB47ZyZpGCd1UhWx6YWmIPxtGBA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=GN6A20EKSr0i3BIX2IzE0nB/Ew0aNAsUezWnAnuNzPOQ2Dqrr204U/GDkPhfvm/cq 1xAHVVZhFbAcwaLCQjBMgmf/PSiUr3BWQb6oxveH91T5TByQ4drEsgKp0m3/taOlwd PNH61X+daeSDKLdoqbibhvhlgu0VuXurPiKcnFws= Received: from [10.66.66.8] (unknown [139.59.64.216]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail20.mymailcheap.com (Postfix) with ESMTPSA id 0931040FCD; Fri, 29 Mar 2024 08:56:09 +0000 (UTC) Message-ID: Date: Fri, 29 Mar 2024 14:26:07 +0530 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 v4] x86/mm/ident_map: On UV systems, use gbpages only where full GB page should be mapped. To: Ingo Molnar Cc: Steve Wahl , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , linux-kernel@vger.kernel.org, Linux regressions mailing list , stable@vger.kernel.org, Eric Hagberg , Simon Horman , Eric Biederman , Dave Young , Sarah Brofeldt , Russ Anderson , Dimitri Sivanich , Hou Wenlong , Andrew Morton , Baoquan He , Yuntao Wang , Bjorn Helgaas References: <20240328160614.1838496-1-steve.wahl@hpe.com> <47302624-6466-41a7-85db-f6872d58a4d2@pavinjoseph.com> Content-Language: en-US From: Pavin Joseph In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spamd-Result: default: False [-0.09 / 10.00]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_ONE(0.00)[1]; ASN(0.00)[asn:16276, ipnet:51.83.0.0/16, country:FR]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_TWELVE(0.00)[25]; RCVD_TLS_ALL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FREEMAIL_CC(0.00)[hpe.com,linux.intel.com,kernel.org,infradead.org,linutronix.de,redhat.com,alien8.de,zytor.com,vger.kernel.org,lists.linux.dev,gmail.com,verge.net.au,xmission.com,dbc.dk,antgroup.com,linux-foundation.org,google.com]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_DN_SOME(0.00)[] X-Rspamd-Server: nf1.mymailcheap.com X-Rspamd-Action: no action X-Rspamd-Queue-Id: AC4664007F On 3/29/24 13:45, Ingo Molnar wrote: > Just to clarify, we have the following 3 upstream (and soon to be upstream) versions: > > v1: pre-d794734c9bbf kernels > v2: d794734c9bbf x86/mm/ident_map: Use gbpages only where full GB page should be mapped. > v3: c567f2948f57 Revert "x86/mm/ident_map: Use gbpages only where full GB page should be mapped." > > Where v1 and v3 ought to be the same in behavior. > > So how does the failure matrix look like on your systems? Is my > understanding accurate: > > > regular boot | regular kexec | nogbpages boot | nogbpages kexec boot > ------------------------|--------------------------------------------------- > v1: OK | OK | OK | FAIL > v2: OK | FAIL | FAIL | FAIL Slight correction: regular boot | regular kexec | nogbpages boot | nogbpages kexec boot -----------------|---------------|----------------|------------------ v1: OK | OK | OK | FAIL v2: OK | FAIL | OK | FAIL Pavin.