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Re: [Qemu-devel] chardev's and fd's in monitors
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-devel] chardev's and fd's in monitors |
Date: |
Fri, 21 Oct 2016 11:06:21 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
"Dr. David Alan Gilbert" <address@hidden> writes:
> * Markus Armbruster (address@hidden) wrote:
>> "Daniel P. Berrange" <address@hidden> writes:
[...]
>> > Realistically all the major backend subsystems (chardev, network, block,
>> > ui and migration) need to be converted to Error ** propagation, since
>> > they all ultimately call into some common code that reports Error **.
>>
>> Infrastucture generally doesn't know how it's used, which means
>> error_report() is generally wrong there. Sufficiently simple functions
>> can keep returning -errno, null, whatever, but the interesting stuff
>> needs to use Error.
>> > Very few places will end up being able to stick with -errno, or plain
>> > error_report in the long term.
>>
>> Not sure about "very few". Less than now. We'll see.
>
> I'd also prefer we got the very-few level; Migration used to be
> characterised by getting a 'load of migration failed -22' and having
> no clue in the logs to why; I've slowly fought back to be able
> to get an error from the lowest level that caused the failure.
> I want more of that, so that when someone gets a rare failure in the field
> I can see why.
When it's about details that are only useful for debugging, logging
might be a practical alternative. No excuse for shoddy error reporting,
of course.
- Re: [Qemu-devel] chardev's and fd's in monitors, (continued)
- Re: [Qemu-devel] chardev's and fd's in monitors, Markus Armbruster, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Daniel P. Berrange, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Dr. David Alan Gilbert, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Markus Armbruster, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Dr. David Alan Gilbert, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Daniel P. Berrange, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Markus Armbruster, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Daniel P. Berrange, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Markus Armbruster, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors, Dr. David Alan Gilbert, 2016/10/20
- Re: [Qemu-devel] chardev's and fd's in monitors,
Markus Armbruster <=
- Re: [Qemu-devel] chardev's and fd's in monitors, Daniel P. Berrange, 2016/10/21
- Re: [Qemu-devel] chardev's and fd's in monitors, Dr. David Alan Gilbert, 2016/10/21
- Re: [Qemu-devel] chardev's and fd's in monitors, Dr. David Alan Gilbert, 2016/10/21
- Re: [Qemu-devel] chardev's and fd's in monitors, Paolo Bonzini, 2016/10/19
- Re: [Qemu-devel] chardev's and fd's in monitors, Dr. David Alan Gilbert, 2016/10/19
- Re: [Qemu-devel] chardev's and fd's in monitors, Paolo Bonzini, 2016/10/19
- Re: [Qemu-devel] chardev's and fd's in monitors, Daniel P. Berrange, 2016/10/20
Re: [Qemu-devel] chardev's and fd's in monitors, Markus Armbruster, 2016/10/18