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Re: [PATCH 2/8] xen/evtchn: modify evtchn_alloc_unbound to allocate specified port
- To: Rahul Singh <Rahul.Singh@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 28 Jul 2022 17:51:38 +0200
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- Cc: Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Julien Grall <julien@xxxxxxx>
- Delivery-date: Thu, 28 Jul 2022 15:51:52 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 28.07.2022 17:37, Rahul Singh wrote:
>> On 26 Jul 2022, at 6:37 pm, Julien Grall <julien@xxxxxxx> wrote:
>> On 21/07/2022 16:37, Rahul Singh wrote:
>>> Ok. I will not add the warning. Just to confirm again is that okay If I add
>>> new command line option "max_event_channels” in
>>> next version for dom0 to restrict the max number of evtchn.
>>
>> Personally I am fine with a command line option to *globally* restrict the
>> number of events channel. But Jan seemed to have some reservation. Quoting
>> what he wrote previously:
>>
>> "Imo there would need to be a very good reason to limit Dom0's port range.
>
> As you mentioned, if we don’t restrict the number of events channel for the
> dom0 system will boot slower.
> This is a good reason to restrict the number of event channels for dom0.
>
> @Jan: I need your input on this before I send the next version of the patch
> series.
I have to admit that it's not clear to me what you expect - I continue to
think the way expressed before.
Jan
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