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Re: [Xen-devel] [PATCH] evtchn: make support for different ABIs tunable
- To: Jan Beulich <jbeulich@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: George Dunlap <george.dunlap@xxxxxxxxxx>
- Date: Wed, 14 Aug 2019 13:51:13 +0100
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Konrad RzeszutekWilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Eslam Elnikety <elnikety@xxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, David Woodhouse <dwmw@xxxxxxxxxxxx>
- Delivery-date: Wed, 14 Aug 2019 12:51:28 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 8/7/19 5:03 PM, Jan Beulich wrote:
> Whatever we do in Xen, it'll only allow to work around that issue.
> An actual fix belongs in the kernel(s). For this reason I suppose
> what we're talking about here is a feature (from Xen's pov), not a
> bug fix. And it being a feature, it should preferably be coded in
> a way that's usable also going forward.
FWIW, I agree with what I understand Jan to be saying:
1. It would be good to be able to disable FIFO event channels, but
2. Disabling them in Xen isn't really the right way to fix Amazon's
issue. Rather, probably the soft reboot should reset the event channel
state.
-George
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