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Re: [PATCH] hw/char/pl011: Output characters using best-effort mode

From: Paolo Bonzini
Subject: Re: [PATCH] hw/char/pl011: Output characters using best-effort mode
Date: Fri, 21 Feb 2020 19:15:21 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1

On 21/02/20 14:14, Peter Maydell wrote:
> The initial case reported by Gavin in this thread is
> "-serial tcp:" with the other end being a program which
> listens on TCP port 50900 and then sleeps without accepting any incoming
> connections, which blocks the serial port output and effectively blocks
> the guest bootup. If you want to insulate the guest from badly
> behaved consumers like that (or the related consumer who accepts
> the connection and then just doesn't read data from it) you probably
> need to deal with more than just POLLHUP. But I'm not sure how much
> we should care about these cases as opposed to just telling users
> not to do that...

No, I think we don't do anything (on purpose; that is, it was considered
the lesser evil) for x86 in that case.


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