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From: Peter Xu <peterx@redhat.com>
To: Igor Mammedov <imammedo@redhat.com>
Cc: qemu-devel@nongnu.org, pbonzini@redhat.com, mst@redhat.com,
	mtosatti@redhat.com, kraxel@redhat.com, peter.maydell@linaro.org
Subject: Re: [PATCH v2 5/6] hpet: make main counter read lock-less
Date: Fri, 1 Aug 2025 09:32:15 -0400	[thread overview]
Message-ID: <aIzB32EbLiASm9Dj@x1.local> (raw)
In-Reply-To: <20250801100645.133727f0@fedora>

On Fri, Aug 01, 2025 at 10:06:45AM +0200, Igor Mammedov wrote:
> docs put qatomic_inc() in 'Sequentially consistent' category,
> hence no manual barrier.

True.. I somehow read it as a _set().  Maybe it's another way to prove
memory barriers are error prone, by making a mistake myself. :)

Thanks,

-- 
Peter Xu



  reply	other threads:[~2025-08-01 13:40 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-30 12:39 [PATCH v2 0/6] Reinvent BQL-free PIO/MMIO Igor Mammedov
2025-07-30 12:39 ` [PATCH v2 1/6] memory: reintroduce BQL-free fine-grained PIO/MMIO Igor Mammedov
2025-07-30 21:47   ` Peter Xu
2025-07-31  8:15     ` Igor Mammedov
2025-08-01 12:42     ` Igor Mammedov
2025-08-01 13:19       ` Peter Xu
2025-07-30 12:39 ` [PATCH v2 2/6] acpi: mark PMTIMER as unlocked Igor Mammedov
2025-07-30 12:39 ` [PATCH v2 3/6] hpet: switch to fain-grained device locking Igor Mammedov
2025-07-30 12:39 ` [PATCH v2 4/6] hpet: move out main counter read into a separate block Igor Mammedov
2025-07-30 12:39 ` [PATCH v2 5/6] hpet: make main counter read lock-less Igor Mammedov
2025-07-30 22:15   ` Peter Xu
2025-07-31  8:32     ` Igor Mammedov
2025-07-31 14:02       ` Peter Xu
2025-08-01  8:06         ` Igor Mammedov
2025-08-01 13:32           ` Peter Xu [this message]
2025-07-30 12:39 ` [PATCH v2 6/6] kvm: i386: irqchip: take BQL only if there is an interrupt Igor Mammedov
2025-07-31 19:24   ` Peter Xu
2025-08-01  8:42     ` Igor Mammedov
2025-08-01 13:08       ` Paolo Bonzini
2025-08-01 10:26   ` Paolo Bonzini
2025-08-01 12:47     ` Igor Mammedov
2025-07-31 21:15 ` [PATCH v2 0/6] Reinvent BQL-free PIO/MMIO Philippe Mathieu-Daudé

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