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From: Peter Xu <peterx@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Stefan Hajnoczi" <stefanha@redhat.com>,
	qemu-devel@nongnu.org, "Alex Bennée" <alex.bennee@linaro.org>,
	"Fam Zheng" <famz@redhat.com>, "Eric Blake" <eblake@redhat.com>,
	"Marc-André Lureau" <marcandre.lureau@redhat.com>,
	"Markus Armbruster" <armbru@redhat.com>,
	"Dr . David Alan Gilbert" <dgilbert@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 2/2] qemu-thread: let cur_mon be per-thread
Date: Wed, 11 Apr 2018 17:48:12 +0800	[thread overview]
Message-ID: <20180411094812.GI13887@xz-mi> (raw)
In-Reply-To: <4183b7d5-83c5-5401-3ac4-937bb40a14e8@redhat.com>

On Wed, Apr 11, 2018 at 11:38:58AM +0200, Paolo Bonzini wrote:
> On 11/04/2018 11:35, Peter Xu wrote:
> > Yeah, the inheritance will only make sure cur_mon be initialized
> > always with correct value just like when we are without Out-Of-Band.
> > For example, it's still possible a thread is created within a QMP
> > handler.  If without current change, the cur_mon in the new thread
> > would be NULL.
> > 
> > AFAIU even if cur_mon==NULL we should mostly be fine (e.g.,
> > error_vprintf will handle that case well).  If any of you can help me
> > confirm this, then I agree that this patch is not really needed.
> 
> Yes, though the solution is to not use error_vprintf from auxiliary
> threads. :)  Just make sure all the communication happens through a
> struct that's passed in the thread entry point, and possibly bottom
> halves from the auxiliary thread to the monitor iothread.

Okay. :) Thanks for confirming.  Then let me repost this patch without
touching the qemu-threads.

Btw, do you want me to repost the first patch separately too, or keep
the code as is?  I believe it depends on whether you treat that one as
a cleanup or not.  Thanks,

-- 
Peter Xu

  reply	other threads:[~2018-04-11  9:48 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-10 12:49 [Qemu-devel] [PATCH 0/2] qemu-thread: allow cur_mon be per thread Peter Xu
2018-04-10 12:49 ` [Qemu-devel] [PATCH 1/2] qemu-thread: always keep the posix wrapper layer Peter Xu
2018-04-10 13:35   ` Eric Blake
2018-04-11  3:18     ` Peter Xu
2018-04-10 12:49 ` [Qemu-devel] [PATCH 2/2] qemu-thread: let cur_mon be per-thread Peter Xu
2018-04-10 13:54   ` Eric Blake
2018-04-11  3:31     ` Peter Xu
2018-04-11  1:45   ` Stefan Hajnoczi
2018-04-11  3:49     ` Peter Xu
2018-04-11  9:23       ` Paolo Bonzini
2018-04-11  9:35         ` Peter Xu
2018-04-11  9:38           ` Paolo Bonzini
2018-04-11  9:48             ` Peter Xu [this message]
2018-04-11 13:06               ` Eric Blake
2018-04-12  5:24                 ` Peter Xu

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