linux-kernel - Re: [PATCH v2 0/3] KVM: s390: Couple of small cmpxchg() optimizations

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Message-ID: <94486deb-6223-422d-a7f8-759b081b67d2@linux.ibm.com>
Date: Tue, 26 Nov 2024 13:26:37 +0100
From: Janosch Frank <frankja@...ux.ibm.com>
To: Heiko Carstens <hca@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>
Cc: kvm@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/3] KVM: s390: Couple of small cmpxchg() optimizations

On 11/26/24 11:25 AM, Heiko Carstens wrote:
> v2:
> - Replace broken WRITE_ONCE(..., 9) with intended WRITE_ONCE(..., 0).
> 
> v1:
> Use try_cmpxchg() instead of cmpxchg() so compilers with flag output
> operand support (gcc 14 and newer) can generate slightly better code.
> 
> Also get rid of two cmpxchg() usages on one/two byte memory areas
> which generates inefficient code.
> 
> bloat-o-meter statistics of the kvm module:
> 

Looks good to me, Ack to the series.