linux-kernel - Re: [PATCH] KVM: selftests: Enable USERFAULTFD

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Message-ID: <Y+FssQB6i+mf1Z97@sirena.org.uk>
Date:   Mon, 6 Feb 2023 21:10:09 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Oliver Upton <oliver.upton@...ux.dev>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Shuah Khan <shuah@...nel.org>, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        anup@...infault.org
Subject: Re: [PATCH] KVM: selftests: Enable USERFAULTFD

On Mon, Feb 06, 2023 at 06:15:16PM +0000, Sean Christopherson wrote:

> What do CI systems do for HugeTLB and THP?  Those are the other config options I
> can think of where there are very interesting interactions from a KVM perspective,
> but where KVM doesn't have a strict dependency on the feature.

> E.g. x86_64_defconfig selects CONFIG_HUGETLBFS=y, but I don't see anything for THP,
> and AFAICT TRANSPARENT_HUGEPAGE is default=n.

Most likely they'll either just go with defconfig plus whatever's in the
fragement, or they'll lump all the kselftest fragments together (which
isn't ideal but cuts down on the number of kernels you have to build).
If someone's specifically set something up for KVM they might do more
combinations.

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