From: Stefan Hajnoczi <stefanha@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel@nongnu.org, gshan@redhat.com, eesposit@redhat.com,
david@redhat.com, cohuck@redhat.com, eauger@redhat.com
Subject: Re: [PATCH 6/8] aio-wait: switch to smp_mb__after_rmw()
Date: Mon, 6 Mar 2023 09:38:56 -0500 [thread overview]
Message-ID: <20230306143856.GA51288@fedora> (raw)
In-Reply-To: <20230303171939.237819-7-pbonzini@redhat.com>
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On Fri, Mar 03, 2023 at 06:19:37PM +0100, Paolo Bonzini wrote:
> The barrier comes after an atomic increment, so it is enough to use
> smp_mb__after_rmw(); this avoids a double barrier on x86 systems.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
> include/block/aio-wait.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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next prev parent reply other threads:[~2023-03-06 14:39 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-03 17:19 [PATCH 0/8] Fix missing memory barriers on ARM Paolo Bonzini
2023-03-03 17:19 ` [PATCH 1/8] qatomic: add smp_mb__before/after_rmw() Paolo Bonzini
2023-03-05 18:57 ` Richard Henderson
2023-03-05 21:00 ` Paolo Bonzini
2023-03-06 13:21 ` David Hildenbrand
2023-03-06 13:22 ` David Hildenbrand
2023-03-03 17:19 ` [PATCH 2/8] qemu-thread-posix: cleanup, fix, document QemuEvent Paolo Bonzini
2023-03-05 19:11 ` Richard Henderson
2023-03-06 13:28 ` David Hildenbrand
2023-03-03 17:19 ` [PATCH 3/8] qemu-thread-win32: " Paolo Bonzini
2023-03-05 19:14 ` Richard Henderson
2023-03-06 13:31 ` David Hildenbrand
2023-03-06 14:20 ` Paolo Bonzini
2023-03-06 14:32 ` David Hildenbrand
2023-03-06 15:17 ` Paolo Bonzini
2023-03-03 17:19 ` [PATCH 4/8] edu: add smp_mb__after_rmw() Paolo Bonzini
2023-03-05 19:14 ` Richard Henderson
2023-03-06 13:31 ` David Hildenbrand
2023-03-06 13:38 ` Peter Maydell
2023-03-06 14:10 ` Paolo Bonzini
2023-03-06 14:24 ` Peter Maydell
2023-03-06 15:06 ` Paolo Bonzini
2023-03-06 15:36 ` Peter Maydell
2023-03-03 17:19 ` [PATCH 5/8] util/async: add smp_mb__after_rmw() around BH enqueue/dequeue Paolo Bonzini
2023-03-05 19:32 ` Richard Henderson
2023-03-06 9:55 ` Paolo Bonzini
2023-03-03 17:19 ` [PATCH 6/8] aio-wait: switch to smp_mb__after_rmw() Paolo Bonzini
2023-03-05 19:32 ` Richard Henderson
2023-03-06 13:32 ` David Hildenbrand
2023-03-06 14:38 ` Stefan Hajnoczi [this message]
2023-03-03 17:19 ` [PATCH 7/8] qemu-coroutine-lock: add smp_mb__after_rmw() Paolo Bonzini
2023-03-05 19:36 ` Richard Henderson
2023-03-06 13:33 ` David Hildenbrand
2023-03-03 17:19 ` [PATCH 8/8] physmem: add missing memory barrier Paolo Bonzini
2023-03-05 19:40 ` Richard Henderson
2023-03-06 13:34 ` David Hildenbrand
2023-03-06 13:35 ` [PATCH 0/8] Fix missing memory barriers on ARM David Hildenbrand
2023-03-06 14:14 ` Paolo Bonzini
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