linux-kernel - Re: [PATCH v2 07/13] KVM: selftests: Create a new guest

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Message-ID: <diqzv7krevdv.fsf@google.com>
Date: Mon, 06 Oct 2025 11:29:48 -0700
From: Ackerley Tng <ackerleytng@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>, 
	Christian Borntraeger <borntraeger@...ux.ibm.com>, Janosch Frank <frankja@...ux.ibm.com>, 
	Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	David Hildenbrand <david@...hat.com>, Fuad Tabba <tabba@...gle.com>
Subject: Re: [PATCH v2 07/13] KVM: selftests: Create a new guest_memfd for
 each testcase

Sean Christopherson <seanjc@...gle.com> writes:

> Refactor the guest_memfd selftest to improve test isolation by creating a
> a new guest_memfd for each testcase.  Currently, the test reuses a single
> guest_memfd instance for all testcases, and thus creates dependencies
> between tests, e.g. not truncating folios from the guest_memfd instance
> at the end of a test could lead to unexpected results (see the PUNCH_HOLE
> purging that needs to done by in-flight the NUMA testcases[1]).
>
> Invoke each test via a macro wrapper to create and close a guest_memfd
> to cut down on the boilerplate copy+paste needed to create a test.
>
> Link: https://lore.kernel.org/all/20250827175247.83322-10-shivankg@amd.com
> Reported-by: Ackerley Tng <ackerleytng@...gle.com>

Reviewed-by: Ackerley Tng <ackerleytng@...gle.com>
Tested-by: Ackerley Tng <ackerleytng@...gle.com>

> Reviewed-by: Fuad Tabba <tabba@...gle.com>
> Tested-by: Fuad Tabba <tabba@...gle.com>
> Reviewed-by: David Hildenbrand <david@...hat.com>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
>  .../testing/selftests/kvm/guest_memfd_test.c  | 31 ++++++++++---------
>  1 file changed, 16 insertions(+), 15 deletions(-)
>
> 
> [...snip...]
>