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Re: [Qemu-devel] [PATCH 13/17] coroutine-lock: introduce qemu_co_mutex_l


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 13/17] coroutine-lock: introduce qemu_co_mutex_lock_unlock
Date: Thu, 4 May 2017 18:17:13 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0


On 04/05/2017 16:12, Stefan Hajnoczi wrote:
>> This primitive lets you lock/unlock a CoMutex, guaranteeing neither
>> blocking nor cacheline bouncing if there is no qemu_co_mutex_lock
>> critical section.
> "Guaranteeing neither X nor Y" means "does not guarantee X or Y".  Did
> you mean "Guarantees not X and not Y"?

Oops, thanks---I didn't know this!  "Guaranteeing no blocking and no
cacheline bouncing if there is no concurrent critical section".

Paolo



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