From: Peter Maydell <peter.maydell@linaro.org>
To: 陳韋任 <chenwj@iis.sinica.edu.tw>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Multi-threaded user program support?
Date: Fri, 19 Aug 2011 04:13:37 +0100 [thread overview]
Message-ID: <CAFEAcA_u3YHmvwAUN-grbNVCWbgxAjrPb2ZDM8_=o_PMhAGv+g@mail.gmail.com> (raw)
In-Reply-To: <20110819025943.GA53608@cs.nctu.edu.tw>
On 19 August 2011 03:59, 陳韋任 <chenwj@iis.sinica.edu.tw> wrote:
>> More generally and not x86-specific, there are problems with
>> the multithreaded user-mode support which I suspect exist because
>> nobody has ever sat down and worked out a coherent design for it,
>> including what might need to be thread-local and what locking
>> is required. So the result is that it mostly works but if you
>
> You mean some QEMU data structures need to be thread-local or lock
> protected in order to emulate guest multi-threaded program correctly?
Approximately, yes (the third option being "redesign the data
structure so it can be sensibly protected"). See
https://bugs.launchpad.net/qemu/+bug/668799 for discussion of
one example.
None of this is impossibly difficult; it just requires that somebody
sits down and actually works through the problems and fixes them.
-- PMM
next prev parent reply other threads:[~2011-08-19 3:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-18 2:35 [Qemu-devel] Multi-threaded user program support? 陳韋任
2011-08-18 3:00 ` Peter Maydell
2011-08-19 2:59 ` 陳韋任
2011-08-19 3:13 ` Peter Maydell [this message]
2011-08-19 16:19 ` Richard Henderson
2011-08-20 2:35 ` 陳韋任
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