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Re: [Qemu-devel] Sporadic AHCI boot failures


From: Jan Kiszka
Subject: Re: [Qemu-devel] Sporadic AHCI boot failures
Date: Thu, 03 May 2012 09:17:24 -0300
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666

On 2012-05-02 18:26, Alexander Graf wrote:
> 
> 
> On 02.05.2012, at 20:14, Jan Kiszka <address@hidden> wrote:
> 
>> Hi,
>>
>> I'm running a Win7 VM over AHCI, rebooting quite frequently. Depending
>> on host system load, I'm facing a lot of sporadic boot failures (disk
>> not found), obviously in SeaBIOS. Could it be that some timeout in the
>> init code bites us here? AHCI_LINK_TIMEOUT or AHCI_RESET_TIMEOUT? Just a
>> guess, I haven't debugged this yet.
> 
> Hm, I'd be surprised if that's the problem.
> 
> Do things work again after system_reset on the monitor? Maybe the reset 
> function is just broken and we finish some asynchronous stuff after reset?

The problem both occurs after power on as well as reset. Sometimes it
takes multiple system_reset calls to get the system booting.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux



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