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Re: [Qemu-discuss] qemu-system-arm linux guest reboot sometimes hangs

From: Peter Maydell
Subject: Re: [Qemu-discuss] qemu-system-arm linux guest reboot sometimes hangs
Date: Fri, 19 Oct 2018 10:13:04 +0100

On 19 October 2018 at 07:43, Jaap Crezee <address@hidden> wrote:
> On 10/16/18 11:39, Peter Maydell wrote:
>> There is a race condition I discovered recently for TCG guests where
>> occasionally a request for a system reset is lost. It may be you're
>> running into that. We don't have a patch for it yet, but when we
>> do I'll cc you so you can test it, if you like.
> I seem to be also experiencing a similar issue with qemu-system-aarch64,
> could that also be related?
> Jenkins output:
> 01:00:47 [    0.432377] Serial: AMBA PL011 UART driver
> 01:00:47 [    0.486165] 9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 39,
> base_baud = 0) is a PL011 rev1
> 01:00:47 [    0.497562] console [ttyAMA0] enabled
> Cancelling nested steps due to timeout
> 01:15:33 Sending interrupt signal to process
> Normally the boot continues beyond this point.

No, that looks different. The race condition I know about
only triggers when the guest specifically requests a
reset or shutdown.

For that one you'd probably need to investigate to find out exactly
what the guest is timing out on, and what its timeout is.

-- PMM

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