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SubjectRe: [PATCH V4 7/9] vhost: do not use RCU to synchronize MMU notifier with worker
On Thu, Aug 08, 2019 at 08:54:54PM +0800, Jason Wang wrote:

> I don't have any objection to convert  to spinlock() but just want to
> know if any case that the above smp_mb() + counter looks good to you?

This email is horribly mangled, but I don't think mixing smb_mb() and
smp_load_acquire() would be considerd a best-practice, and using
smp_store_release() instead would be the wrong barrier.

spinlock does seem to be the only existing locking primitive that does
what is needed here.

Jason

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