From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:55397)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <arei.gonglei@huawei.com>) id 1Xtx9y-00044x-Hl
	for qemu-devel@nongnu.org; Thu, 27 Nov 2014 06:23:00 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <arei.gonglei@huawei.com>) id 1Xtx9q-0005pS-8J
	for qemu-devel@nongnu.org; Thu, 27 Nov 2014 06:22:54 -0500
Received: from szxga02-in.huawei.com ([119.145.14.65]:23721)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <arei.gonglei@huawei.com>) id 1Xtx9p-0005o8-IQ
	for qemu-devel@nongnu.org; Thu, 27 Nov 2014 06:22:46 -0500
Message-ID: <54770972.60206@huawei.com>
Date: Thu, 27 Nov 2014 19:22:26 +0800
From: Gonglei <arei.gonglei@huawei.com>
MIME-Version: 1.0
References: <1417079052-9372-1-git-send-email-kraxel@redhat.com>
	<5476EE1B.4090302@huawei.com>
	<1417086243.3722.26.camel@nilsson.home.kraxel.org>
	<54770809.1000507@huawei.com>
	<1417087153.3722.31.camel@nilsson.home.kraxel.org>
In-Reply-To: <1417087153.3722.31.camel@nilsson.home.kraxel.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] [RfC PATCH] hid: handle full ptr queues in
	post_load
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>

On 2014/11/27 19:19, Gerd Hoffmann wrote:

> On Do, 2014-11-27 at 19:16 +0800, Gonglei wrote:
>> On 2014/11/27 19:04, Gerd Hoffmann wrote:
>>
>>>   Hi,
>>>
>>>>> +        evt = s->ptr.queue[(s->head+s->n) & QUEUE_MASK];
>>>>
>>>> s->n is QUEUE_LENGTH, can we directly delete it?
>>>>   evt = s->ptr.queue[s->head & QUEUE_MASK]
>>>
>>> I prefer to make clear in the code that we want the last ring element
>>> not the first and leave in the "+n", even if we could take it out.
>>>
>> OK.
>>
>> Another question, whether or not we handle this scenario
>> before calling hid_set_next_idle(s) ? Maybe it is safer, because
>> hid_idle_timer will call  hid_pointer_event(), callback function
>> of hs->event(hs).
> 
> Not needed, the timer will not called before vmload is completely
> finished.
> 

Yep, as the Qemu big lock.
I will test this patch later, thanks for your work. :)

Regards,
-Gonglei