Re: [PATCH v7 0/3] x86/tdx: Fix HLT logic execution for TDX VMs

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To: vannapurve@xxxxxxxxxx
Subject: Re: [PATCH v7 0/3] x86/tdx: Fix HLT logic execution for TDX VMs
From: Ryan Afranji <afranji@xxxxxxxxxx>
Date: Mon, 24 Mar 2025 18:53:53 +0000
Cc: ackerleytng@xxxxxxxxxx, afranji@xxxxxxxxxx, ajay.kaher@xxxxxxxxxxxx, ak@xxxxxxxxxxxxxxx, bcm-kernel-feedback-list@xxxxxxxxxxxx, bp@xxxxxxxxx, chao.p.peng@xxxxxxxxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, erdemaktas@xxxxxxxxxx, hpa@xxxxxxxxx, isaku.yamahata@xxxxxxxxx, jgross@xxxxxxxx, jikos@xxxxxxxxxx, jxgao@xxxxxxxxxx, kai.huang@xxxxxxxxx, kees@xxxxxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, linux-coco@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, mingo@xxxxxxxxxx, pbonzini@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, sagis@xxxxxxxxxx, sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx, seanjc@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, thomas.lendacky@xxxxxxx, tony.luck@xxxxxxxxx, virtualization@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx
In-reply-to: <20250228014416.3925664-1-vannapurve@google.com>
References: <20250228014416.3925664-1-vannapurve@google.com>

Tested with the specjbb2015 benchmark. It has heavy lock contention which leads
to many halt calls. TDX VMs suffered a poor score before this patchset.

Verified the major performance improvement with this patchset applied.

Tested-by: Ryan Afranji <afranji@xxxxxxxxxx>

References:
- [PATCH v7 0/3] x86/tdx: Fix HLT logic execution for TDX VMs
  - From: Vishal Annapurve

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