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Subject: Re: 4.20-rc1 looks broken for UML
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From: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
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Cc: Richard Weinberger <richard@nod.at>, grek@kroah.com


On 11/5/18 10:07 PM, Richard Weinberger wrote:
> Anton,
>
> Am Montag, 5. November 2018, 16:22:36 CET schrieb Anton Ivanov:
>> This looks like something specific to ttys - the io there gets
>> corruption and/or hangs.
>>
>> I cannot reproduce it when I ssh in.
>>
>> It does not look like it is the new write IRQ bugfix - that works fine
>> over 4.19.
>>
>> Still debugging...
> Hmm, I don't see this with my Debian userspace.
> What exactly is your setup/config?


Gotcha.

8ebfe885c65ec82a0b1e955cf99ed62664e84414 is the guilty party.

With it, I get tty corruption on UML. Any attempt to push a large amount 
of data via the console results in spurious echoes or even a hang.

Reverting it fixes things.

Cc-ing Greg - it was merged from his tree.

I will try to figure out what exactly is wrong with it in the meantime. 
On first reading it looked OK.

A


> Thanks,
> //richard
>
>
>
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