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Re: [Qemu-devel] [PATCH] qdev-monitor.c: Add device id generation
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-devel] [PATCH] qdev-monitor.c: Add device id generation |
Date: |
Tue, 25 Aug 2015 20:30:17 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
Programmingkid <address@hidden> writes:
> On Aug 25, 2015, at 11:33 AM, Peter Maydell wrote:
>
>> On 25 August 2015 at 16:25, Programmingkid <address@hidden> wrote:
>>> On Aug 25, 2015, at 8:42 AM, Markus Armbruster wrote:
>>>> Eric Blake <address@hidden> writes:
>>>>
>>>>> On 08/24/2015 12:53 PM, Programmingkid wrote:
>>>>>> +/* USB's max number of devices is 127. This number is 3 digits long. */
>>>>>> +#define MAX_NUM_DIGITS_FOR_USB_ID 3
>>>>
>>>> This limit makes no sense to me.
>>>
>>> The limit is used to decide how many characters the device_id
>>> string is going to have.
>>> Three digits would be 0 to 999 device ID's would be supported. I
>>> can't imagine
>>> anyone spending the time to add that many devices.
>>
>> Arbitrary limits are often a bad idea, especially when
>> they're easy to avoid, as here.
>
> Knowing QEMU's limits can save the user from crashes and other
> problems. There is
> only a finite amount of memory available to QEMU.
Repeat N times:
device_add FOO,id=hot
device_del hot
Memory usage independent of N (unless we leak, but that would be a bug).
[...]
Re: [Qemu-devel] [PATCH] qdev-monitor.c: Add device id generation, Programmingkid, 2015/08/25
[Qemu-devel] Should we auto-generate IDs? (was: [PATCH] qdev-monitor.c: Add device id generation), Markus Armbruster, 2015/08/25
- Re: [Qemu-devel] Should we auto-generate IDs? (was: [PATCH] qdev-monitor.c: Add device id generation), Programmingkid, 2015/08/25
- Re: [Qemu-devel] Should we auto-generate IDs? (was: [PATCH] qdev-monitor.c: Add device id generation), Programmingkid, 2015/08/26
- Re: [Qemu-devel] Should we auto-generate IDs?, Markus Armbruster, 2015/08/26
- Re: [Qemu-devel] Should we auto-generate IDs?, Programmingkid, 2015/08/26
- Re: [Qemu-devel] Should we auto-generate IDs?, Peter Maydell, 2015/08/26
- Re: [Qemu-devel] Should we auto-generate IDs?, Programmingkid, 2015/08/26
- Re: [Qemu-devel] Should we auto-generate IDs?, John Snow, 2015/08/26