From: Tony Lindgren <tony.lindgren@linux.intel.com>
To: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: bp@alien8.de, dave.hansen@intel.com, hpa@zytor.com,
kas@kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
mingo@redhat.com, nik.borisov@suse.com, pbonzini@redhat.com,
seanjc@google.com, tglx@kernel.org, vannapurve@google.com,
x86@kernel.org, chao.gao@intel.com, yan.y.zhao@intel.com,
kai.huang@intel.com
Subject: Re: [PATCH v6 00/11] Dynamic PAMT
Date: Mon, 8 Jun 2026 08:45:10 +0300 [thread overview]
Message-ID: <aiZW5oSFJMnr-p7J@tlindgre-MOBL1> (raw)
In-Reply-To: <20260526023515.288829-1-rick.p.edgecombe@intel.com>
On Mon, May 25, 2026 at 07:35:04PM -0700, Rick Edgecombe wrote:
> For a simple small server with mostly physical contiguous RAM and no CXL
> complications, the basic implementation should be close to optimal anyway.
> And for big servers, an 8GB allocation is going to have less impact. In
> the end Dynamic PAMT *is* an optimization that we will force on as a
> good default option. Even with all the optimizations we could throw at it,
> if the system is 100% TDs, Dynamic PAMT could come out slightly behind. So
> judgment on good defaults is needed regardless.
From usage point of view it's not just a memory optimization though.
These patches make it easier to see what gets allocated for TDX IMO.
This based on rebasing other patches on the dynamic PAMT series a few
times over the past year. So for the series:
Reviewed-by: Tony Lindgren <tony.lindgren@linux.intel.com>
next prev parent reply other threads:[~2026-06-08 5:45 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 2:35 Rick Edgecombe
2026-05-26 2:35 ` [PATCH v6 01/11] x86/virt/tdx: Simplify tdmr_get_pamt_sz() Rick Edgecombe
2026-06-04 16:05 ` Kiryl Shutsemau
2026-07-01 0:08 ` Edgecombe, Rick P
2026-06-11 18:25 ` Vishal Annapurve
2026-07-03 5:48 ` Chao Gao
2026-07-06 20:18 ` Edgecombe, Rick P
2026-07-07 3:24 ` Yan Zhao
2026-07-07 19:08 ` Edgecombe, Rick P
2026-07-07 23:22 ` Sohil Mehta
2026-07-08 1:23 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 02/11] x86/virt/tdx: Allocate page bitmap for Dynamic PAMT Rick Edgecombe
2026-06-04 16:14 ` Kiryl Shutsemau
2026-07-01 0:14 ` Edgecombe, Rick P
2026-06-11 18:47 ` Vishal Annapurve
2026-07-03 8:26 ` Chao Gao
2026-07-07 3:59 ` Yan Zhao
2026-07-07 21:25 ` Edgecombe, Rick P
2026-07-08 0:49 ` Sohil Mehta
2026-07-08 2:07 ` Edgecombe, Rick P
2026-07-08 2:10 ` Edgecombe, Rick P
2026-07-08 3:35 ` Sohil Mehta
2026-07-08 20:50 ` Edgecombe, Rick P
2026-07-08 21:20 ` Sohil Mehta
2026-05-26 2:35 ` [PATCH v6 03/11] x86/virt/tdx: Add tdx_alloc/free_control_page() helpers Rick Edgecombe
2026-06-08 2:11 ` Binbin Wu
2026-06-08 2:18 ` Yan Zhao
2026-07-01 0:15 ` Edgecombe, Rick P
2026-07-06 12:31 ` Chao Gao
2026-07-06 20:23 ` Edgecombe, Rick P
2026-07-08 3:50 ` Sohil Mehta
2026-07-08 22:54 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 04/11] x86/virt/tdx: Allocate ref counts for Dynamic PAMT memory Rick Edgecombe
2026-07-02 7:20 ` Binbin Wu
2026-07-06 20:26 ` Edgecombe, Rick P
2026-07-06 13:22 ` Chao Gao
2026-07-06 20:26 ` Edgecombe, Rick P
2026-07-07 4:53 ` Yan Zhao
2026-07-07 22:32 ` Edgecombe, Rick P
2026-07-08 20:49 ` Sohil Mehta
2026-07-08 23:21 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 05/11] x86/virt/tdx: Handle concurrent callers in tdx_pamt_get/put() Rick Edgecombe
2026-07-02 7:39 ` Binbin Wu
2026-07-06 20:27 ` Edgecombe, Rick P
2026-07-07 5:54 ` Chao Gao
2026-07-08 6:46 ` Yan Zhao
2026-07-09 0:33 ` Edgecombe, Rick P
2026-07-09 2:50 ` Yan Zhao
2026-07-09 23:09 ` Edgecombe, Rick P
2026-07-10 2:24 ` Yan Zhao
2026-07-08 19:01 ` Dave Hansen
2026-07-08 21:03 ` Edgecombe, Rick P
2026-07-08 21:11 ` Sohil Mehta
2026-07-08 21:13 ` Dave Hansen
2026-05-26 2:35 ` [PATCH v6 06/11] x86/virt/tdx: Optimize tdx_pamt_get/put() Rick Edgecombe
2026-05-26 8:57 ` Chao Gao
2026-05-26 16:42 ` Edgecombe, Rick P
2026-06-04 16:59 ` Kiryl Shutsemau
2026-06-05 5:40 ` Chao Gao
2026-06-05 11:42 ` Kiryl Shutsemau
2026-06-05 16:23 ` Dave Hansen
2026-06-08 9:14 ` Kiryl Shutsemau
2026-06-08 9:50 ` Yan Zhao
2026-07-01 1:45 ` Edgecombe, Rick P
2026-07-01 5:37 ` Yan Zhao
2026-07-01 1:05 ` Edgecombe, Rick P
2026-07-07 6:45 ` Chao Gao
2026-07-08 8:46 ` Yan Zhao
2026-07-09 0:44 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 07/11] KVM: TDX: Allocate PAMT memory for TD and vCPU control structures Rick Edgecombe
2026-07-02 8:55 ` Binbin Wu
2026-07-06 23:47 ` Sean Christopherson
2026-07-06 23:54 ` Edgecombe, Rick P
2026-07-07 0:25 ` Sean Christopherson
2026-07-08 18:30 ` Dave Hansen
2026-07-07 6:54 ` Chao Gao
2026-07-08 9:13 ` Yan Zhao
2026-07-09 1:12 ` Edgecombe, Rick P
2026-07-09 3:18 ` Yan Zhao
2026-07-10 1:04 ` Edgecombe, Rick P
2026-07-10 2:43 ` Yan Zhao
2026-05-26 2:35 ` [PATCH v6 08/11] x86/tdx: Add APIs to support Dynamic PAMT ops from KVM's fault path Rick Edgecombe
2026-06-04 17:11 ` Kiryl Shutsemau
2026-07-02 9:32 ` Binbin Wu
2026-07-07 7:25 ` Chao Gao
2026-07-09 7:17 ` Yan Zhao
2026-07-10 1:34 ` Edgecombe, Rick P
2026-07-10 2:47 ` Yan Zhao
2026-05-26 2:35 ` [PATCH v6 09/11] KVM: TDX: Get/put PAMT pages when (un)mapping private memory Rick Edgecombe
2026-07-03 3:15 ` Binbin Wu
2026-07-06 20:47 ` Edgecombe, Rick P
2026-07-06 21:02 ` Sean Christopherson
2026-07-06 21:52 ` Edgecombe, Rick P
2026-07-08 8:35 ` Chao Gao
2026-07-09 1:22 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 10/11] x86/virt/tdx: Enable Dynamic PAMT Rick Edgecombe
2026-06-04 17:14 ` Kiryl Shutsemau
2026-06-05 5:25 ` Chao Gao
2026-07-01 1:20 ` Edgecombe, Rick P
2026-07-06 20:48 ` Edgecombe, Rick P
2026-07-03 4:35 ` Binbin Wu
2026-05-26 2:35 ` [PATCH v6 11/11] Documentation/x86: Add documentation for TDX's " Rick Edgecombe
2026-07-03 4:54 ` Binbin Wu
2026-06-08 5:45 ` Tony Lindgren [this message]
2026-07-06 21:01 ` [PATCH v6 00/11] " Edgecombe, Rick P
2026-07-07 16:17 ` Sean Christopherson
2026-07-07 17:25 ` Edgecombe, Rick P
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