linux-kernel - Re: [PATCH v12 04/12] KVM: guest_memfd: Add slab-allocated inode cache

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Message-ID: <diqztt07hi10.fsf@google.com>
Date: Thu, 09 Oct 2025 14:39:07 -0700
From: Ackerley Tng <ackerleytng@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Marc Zyngier <maz@...nel.org>, 
	Oliver Upton <oliver.upton@...ux.dev>, Paolo Bonzini <pbonzini@...hat.com>
Cc: linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev, 
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	David Hildenbrand <david@...hat.com>, Fuad Tabba <tabba@...gle.com>, Shivank Garg <shivankg@....com>, 
	Ashish Kalra <ashish.kalra@....com>, Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH v12 04/12] KVM: guest_memfd: Add slab-allocated inode cache

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

> From: Shivank Garg <shivankg@....com>
>
> Add a dedicated gmem_inode structure and a slab-allocateda inode cache for
> guest memory backing, similar to how shmem handles inodes.
>
> This adds the necessary allocation/destruction functions and prepares
> for upcoming guest_memfd NUMA policy support changes.  Using a dedicated
> structure will also allow for additional cleanups, e.g. to track flags in
> gmem_inode instead of i_private.
>
> Signed-off-by: Shivank Garg <shivankg@....com>
> Tested-by: Ashish Kalra <ashish.kalra@....com>
> [sean: s/kvm_gmem_inode_info/gmem_inode, name init_once()]
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

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

> ---
>  virt/kvm/guest_memfd.c | 77 +++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 76 insertions(+), 1 deletion(-)
>
> 
> [...snip...]
>