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From: Richard Weinberger <richard@nod.at>
To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
Cc: gregkh@linuxfoundation.org, linux-um@lists.infradead.org
Subject: Re: 4.20-rc1 looks broken for UML
Date: Tue, 06 Nov 2018 18:04:25 +0100	[thread overview]
Message-ID: <1819644.8DN5KTyJeP@blindfold> (raw)
In-Reply-To: <a14a0d2e-d734-7f1c-847b-7aa31e9affac@kot-begemot.co.uk>

Am Dienstag, 6. November 2018, 16:00:59 CET schrieb Anton Ivanov:
> 
> 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.

Really?!
This is "TTY: sn_console: Replace spin_is_locked() with spin_trylock()".
sn_console is "SGI Altix L1 serial console"...

Thanks,
//richard



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  parent reply	other threads:[~2018-11-06 17:04 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-05 13:13 4.20-rc1 looks broken for UML Anton Ivanov
2018-11-05 15:22 ` Anton Ivanov
2018-11-05 22:07   ` Richard Weinberger
2018-11-06  7:03     ` Anton Ivanov
2018-11-06 15:00     ` Anton Ivanov
2018-11-06 15:07       ` Anton Ivanov
2018-11-06 18:00         ` Lance Roy
2018-11-06 18:12           ` Anton Ivanov
2018-11-06 17:04       ` Richard Weinberger [this message]
2018-11-06 17:25         ` Anton Ivanov
2018-11-06 19:09           ` Anton Ivanov
2018-11-06 19:56             ` Richard Weinberger
2018-11-06 20:49               ` Richard Weinberger
2018-11-07  7:53                 ` Christoph Hellwig
2018-11-07 10:46                   ` Anton Ivanov
2018-11-07 13:33                     ` Anton Ivanov
2018-11-06 17:42         ` Anton Ivanov

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