From: Paolo Bonzini <pbonzini@redhat.com>
To: Wen Congyang <wency@cn.fujitsu.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] rcu: actually register threads that have RCU read-side critical sections
Date: Thu, 23 Jul 2015 07:35:48 +0200 [thread overview]
Message-ID: <55B07D34.3090800@redhat.com> (raw)
In-Reply-To: <55B057D3.2010907@cn.fujitsu.com>
On 23/07/2015 04:56, Wen Congyang wrote:
>> > Otherwise, grace periods are detected too early!
> We always use qemu_thread_create() in qemu. So I think we can do it like this:
> wrapped_fn()
> {
> rcu_register_thread();
> call thread_fn() here
> rcu_unregister_thread();
> }
>
> So we will never forget to call rcu_register_thread() when creating a new thread.
That's a good idea. Would you like to propose a patch for 2.5? Then we
can also use it to run the thread_atexit notifiers and avoid the bug
that Peter reported for OS X.
Paolo
next prev parent reply other threads:[~2015-07-23 5:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-22 14:18 [Qemu-devel] [PATCH] rcu: actually register threads that have RCU read-side critical sections Paolo Bonzini
2015-07-23 2:56 ` Wen Congyang
2015-07-23 5:35 ` Paolo Bonzini [this message]
2015-07-23 10:30 ` Christian Borntraeger
2015-07-23 10:42 ` Paolo Bonzini
2015-07-23 11:04 ` Wen Congyang
2015-07-23 11:08 ` Paolo Bonzini
2015-07-23 12:59 ` Wen Congyang
2015-07-23 16:58 ` Paolo Bonzini
2015-07-24 3:55 ` Wen Congyang
2015-07-24 5:56 ` Wen Congyang
2015-07-24 6:22 ` Paolo Bonzini
2015-07-24 6:30 ` Wen Congyang
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