[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: What is bs->reqs_lock for?

From: Paolo Bonzini
Subject: Re: What is bs->reqs_lock for?
Date: Thu, 13 Aug 2020 17:54:33 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0

On 13/08/20 16:57, Vladimir Sementsov-Ogievskiy wrote:
> Hi!
> Sorry my stupid question, but which kind of concurrent access
> bs->reqs_lock prevents?
> In my understanding the whole logic of request tracking for the bs is
> going in the coroutine, so, we don't have parallel access anyway? How
> can parallel access to bs->tracked_requests happen?

Different iothreads can access the same BlockDriverState, and block/io.c
is not protected by the AioContext lock (in fact almost nothing, or
nothing, needs it in the I/O path).


reply via email to

[Prev in Thread] Current Thread [Next in Thread]