[Fwd: Re: [uml-devel] Memory corruption/errors?]

[Bodo Stroesser <bstroesser@fujitsu-siemens.com>]

[-- Attachment #1: Type: text/plain, Size: 39 bytes --]

I'm forwarding this to the list.

Bodo

[-- Attachment #2: Re: [uml-devel] Memory corruption/errors? --]
[-- Type: message/rfc822, Size: 3926 bytes --]

From: Peter <peter.spamcatcher@rimuhosting.com>
To: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Cc: Jeff Dike <jdike@addtoit.com>
Subject: Re: [uml-devel] Memory corruption/errors?
Date: Thu, 23 Dec 2004 23:04:02 +1300
Message-ID: <41CA9812.2060505@rimuhosting.com>


I really don't know what fxsr is.  But I think I have it.  My servers 
are dual proc xeons.  2.6.8.1 with skas3 v7 (mostly).

# cat /proc/cpuinfo  | grep fxsr
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid

So you can only reproduce the problem when your use the sighandler?  But 
when you use your patch the problem is not triggered (even with the 
sighandler)?

I'd be happy to try a patch.  I only have production machines at the 
moment, so I may not be able to restart one for a week or two until some 
new ones arrive.

Regards, Peter

Bodo Stroesser wrote:
> Peter wrote:
> 
>> I don't run TT mode UMLs.  So, no I haven't tried that.
>>
>> I don't know about the sighandler.  The program runs as it was listed. 
>> It is running on a 'regular' server (Debian, and/or WBL3) with other 
>> processes running.  And the host servers happen to be running other 
>> UMLs.  I don't know if that information helps.  (i.e. can a sighandler 
>> in another process on the UML or on the host cause this problem?)
>>
>> I'd be happy to try out a skas patch - preferably if it just applied 
>> to the guest ;)  To see if it fixes things or not.
>>
>> Regards, Peter
>>
> I could try to create a patch, just for testing.
> What machine is your host? It probably has fxsr?
> 
> Bodo