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Date: Mon, 05 Aug 2013 18:22:01 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: [Qemu-devel] PING for-1.6 Re: [PATCH v3] semaphore: fix a hangup
 problem under load on NetBSD hosts.
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Cc: aliguori@us.ibm.com, qemu-stable@nongnu.org, qemu-devel@nongnu.org, Izumi Tsutsui <tsutsui@ceres.dti.ne.jp>, Laszlo Ersek <lersek@redhat.com>, Brad <brad@comstyle.com>

On 08/02/2013 12:33 AM, Paolo Bonzini wrote:
> On 08/01/2013 05:24 AM, Brad wrote:
>> On 03/07/13 5:41 AM, Laszlo Ersek wrote:
>>> On 07/03/13 10:58, Izumi Tsutsui wrote:
>>>> Fix following bugs in "fallback implementation of counting semaphores
>>>> with mutex+condvar" added in c166cb72f1676855816340666c3b618beef4b976:
>>>>   - waiting threads are not restarted properly if more than one threads
>>>>     are waiting unblock signals in qemu_sem_timedwait()
>>>>   - possible missing pthread_cond_signal(3) calls when waiting threads
>>>>     are returned by ETIMEDOUT
>>>>   - fix an uninitialized variable
>>>> The problem is analyzed by and fix is provided by Noriyuki Soda.
>>>>
>>>> Also put additional cleanup suggested by Laszlo Ersek:
>>>>   - make QemuSemaphore.count unsigned (it won't be negative)
>>>>   - check a return value of in pthread_cond_wait() in qemu_sem_wait()
>>>>
>>>> Signed-off-by: Izumi Tsutsui <tsutsui@ceres.dti.ne.jp>
>>>> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
>>>> ---
>>>>
>>>>   v3:
>>>>   - fix a missed assignment and actually check a retval of
>>>> pthread_cond_wait()
>>>
>>> Compared v3 against v2.
>>>
>>> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
>>>
>>> Laszlo
>>
>> This patch seems to have been dropped.
>
> CCing Anthony and qemu-stable.

And bumping priority further.

Paolo