linux-kernel - Re: [PATCH v13 21/21] KVM: pfncache: rework __kvm_gpc

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Date: Sat, 17 Feb 2024 10:52:49 +0000
From: David Woodhouse <dwmw2@...radead.org>
To: Sean Christopherson <seanjc@...gle.com>, paul@....org
Cc: Paolo Bonzini <pbonzini@...hat.com>, Jonathan Corbet <corbet@....net>, 
 Christian Borntraeger <borntraeger@...ux.ibm.com>, Janosch Frank
 <frankja@...ux.ibm.com>, Claudio Imbrenda <imbrenda@...ux.ibm.com>, David
 Hildenbrand <david@...hat.com>, Heiko Carstens <hca@...ux.ibm.com>, Vasily
 Gorbik <gor@...ux.ibm.com>, Alexander Gordeev <agordeev@...ux.ibm.com>,
 Sven Schnelle <svens@...ux.ibm.com>, Thomas Gleixner <tglx@...utronix.de>,
 Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen
 <dave.hansen@...ux.intel.com>, x86@...nel.org, "H. Peter Anvin"
 <hpa@...or.com>, Shuah Khan <shuah@...nel.org>, kvm@...r.kernel.org, 
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-s390@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v13 21/21] KVM: pfncache: rework __kvm_gpc_refresh() to
 fix locking issues

On Fri, 2024-02-16 at 07:52 -0800, Sean Christopherson wrote:
> 
> FWIW, I'm not opposed to overhauling the gpc locking, I agree it's a mess  I just
> want to proceed slower than I would for a fix, it's a lot to digest.

Agreed. I'll do a *really* simple expansion of ->refresh_lock for the fix, and
then cleaning up the rwlock abuse can come later (at the very end of
the series I'm about to post, so it can be ignored for now).

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