[Xen-devel] Re: [Xen-staging] [xen-unstable] [QEMU-DM] Upgrade e

To:	"Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject:	[Xen-devel] Re: [Xen-staging] [xen-unstable] [QEMU-DM] Upgrade emulated UART to 16550A.
From:	"Trolle Selander" <trolle.selander@xxxxxxxxx>
Date:	Fri, 7 Dec 2007 18:53:00 +0100
Cc:	xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxx>
Delivery-date:	Fri, 07 Dec 2007 09:53:43 -0800
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That sounds like a workable idea, at least for the non-phys-port case.

On Dec 7, 2007 6:43 PM, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:

On 7/12/07 17:21, "Alex Williamson" < alex.williamson@xxxxxx> wrote:

> On Wed, 2007-12-05 at 23:07 +0100, Trolle Selander wrote:
>> This patch fixes the issue. It also changes the name of an
>> inappropriately named timer.
>
> Hi Trolle,
>
> Yes, with this patch, my HVM domain will eventually boot.
> Unfortunately it takes 2 minutes now to get through all the UART
> timeouts and get to the firmware menu. Prior to the new 16550A UART
> driver, it took 10 seconds. I think we need to do something smarter
> than drop characters after some number of timeouts. We're doomed to
> terrible slowness anytime the console is disconnected that way. Thanks,

Perhaps we should latch the first timeout and fast-drop bursts of characters
until the next character that is not immediately rejected?

-- Keir

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[Xen-devel] Re: [Xen-staging] [xen-unstable] [QEMU-DM] Upgrade emulated