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Date: Mon, 15 Jan 2024 11:16:19 +0200
From: Mike Rapoport <rppt@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Vlastimil Babka <vbabka@suse.cz>, Dave Hansen <dave.hansen@intel.com>,
	Michael Roth <michael.roth@amd.com>, x86@kernel.org,
	kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-mm@kvack.org,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
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	pbonzini@redhat.com, seanjc@google.com, vkuznets@redhat.com,
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	slp@redhat.com, pgonda@google.com, peterz@infradead.org,
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	Brijesh Singh <brijesh.singh@amd.com>
Subject: Re: [PATCH v1 11/26] x86/sev: Invalidate pages from the direct map
 when adding them to the RMP table
Message-ID: <ZaT3424NIr-BrMr_@kernel.org>
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In-Reply-To: <20240115090639.GAZaT1nx4C4xJuF8IA@fat_crate.local>

On Mon, Jan 15, 2024 at 10:06:39AM +0100, Borislav Petkov wrote:
> On Fri, Jan 12, 2024 at 09:27:45PM +0100, Vlastimil Babka wrote:
> > Yeah and last LSF/MM we concluded that it's not as a big disadvantage as we
> > previously thought https://lwn.net/Articles/931406/
> 
> How nice, thanks for that!
> 
> Do you have some refs to Mike's tests so that we could run them here too
> with SNP guests to see how big - if any - the fragmentation has.

I ran several tests from mmtests suite.

The tests results are here:
https://rppt.io/gfp-unmapped-bench/
 
> Thx.
> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> https://people.kernel.org/tglx/notes-about-netiquette
> 

-- 
Sincerely yours,
Mike.