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Re: [Xen-devel] [PATCH] x86 spinlock: Fix memory corruption on completing completions
- To: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
- From: Denys Vlasenko <vda.linux@xxxxxxxxxxxxxx>
- Date: Tue, 10 Feb 2015 14:20:24 +0100
- Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, KVM list <kvm@xxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Jason Wang <jasowang@xxxxxxxxxx>, virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>, Peter Anvin <hpa@xxxxxxxxx>, Davidlohr Bueso <dave@xxxxxxxxxxxx>, Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Sasha Levin <sasha.levin@xxxxxxxxxx>, Paul McKenney <paulmck@xxxxxxxxxxxxxxxxxx>, Andi Kleen <ak@xxxxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Dave Jones <davej@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Waiman Long <waiman.long@xxxxxx>, Oleg Nesterov <oleg@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Tue, 10 Feb 2015 13:37:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Tue, Feb 10, 2015 at 2:18 PM, Denys Vlasenko
<vda.linux@xxxxxxxxxxxxxx> wrote:
> while (1) {
> if (READ_ONCE(lock->tickets.head) != TICKET_TAIL(val))
> cpu_relax();
> }
Doh.... should be
while (READ_ONCE(lock->tickets.head) != TICKET_TAIL(val)
cpu_relax();
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