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([2001:b07:6468:f312:63a7:c72e:ea0e:6045]) by smtp.gmail.com with ESMTPSA id m21sm10569136edc.5.2021.08.11.00.09.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Aug 2021 00:09:43 -0700 (PDT) Subject: Re: [kvm-unit-tests PATCH 1/2] x86: access: Fix timeout failure by limiting number of flag combinations To: Babu Moger , Sean Christopherson Cc: thuth@redhat.com, drjones@redhat.com, kvm@vger.kernel.org References: <162826604263.32391.7580736822527851972.stgit@bmoger-ubuntu> <162826611747.32391.16149996928851353357.stgit@bmoger-ubuntu> <1f30bd0f-da1b-2aa0-e0c8-76d3b5410bcd@amd.com> <7d0aa9b1-2eb7-8c89-9c2b-7712c5031aed@amd.com> <4af3323d-90e9-38a0-f11a-f4e89d0c0b50@amd.com> From: Paolo Bonzini Message-ID: Date: Wed, 11 Aug 2021 09:09:41 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <4af3323d-90e9-38a0-f11a-f4e89d0c0b50@amd.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 11/08/21 01:38, Babu Moger wrote: > No. This will not work. The PKU feature flag is bit 30. That is 2^30 > iterations to cover the tests for this feature. Looks like I need to split > the tests into PKU and non PKU tests. For PKU tests I may need to change > the bump frequency (in ac_test_bump_one) to much higher value. Right now, > it is 1. Let me try that, The simplest way to cut on tests, which is actually similar to this patch, would be: - do not try all combinations of PTE access bits when reserved bits are set - do not try combinations with more than one reserved bit set Paolo