linux-kernel - Re: [PATCH v3 00/16] TDX: Enable Dynamic PAMT

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Message-ID: <8f772a23-ea7f-40eb-8852-49f5e3e16c15@intel.com>
Date: Fri, 26 Sep 2025 07:09:00 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Yan Zhao <yan.y.zhao@...el.com>,
 Rick Edgecombe <rick.p.edgecombe@...el.com>
Cc: kas@...nel.org, bp@...en8.de, chao.gao@...el.com,
 dave.hansen@...ux.intel.com, isaku.yamahata@...el.com, kai.huang@...el.com,
 kvm@...r.kernel.org, linux-coco@...ts.linux.dev,
 linux-kernel@...r.kernel.org, mingo@...hat.com, pbonzini@...hat.com,
 seanjc@...gle.com, tglx@...utronix.de, x86@...nel.org, vannapurve@...gle.com
Subject: Re: [PATCH v3 00/16] TDX: Enable Dynamic PAMT

On 9/25/25 19:28, Yan Zhao wrote:
>> Lastly, Yan raised some last minute doubts internally about TDX
>> module locking contention. I’m not sure there is a problem, but we
>> can come to an agreement as part of the review.
> Yes, I found a contention issue that prevents us from dropping the
> global lock. I've also written a sample test that demonstrates this
> contention.
But what is the end result when this contention happens? Does everyone
livelock?