Re: repeatable hang with loop mount and heavy IO in guest [SOLVED]

[Antoine Martin <antoine@nagafix.co.uk>]

On 01/22/2010 02:57 PM, Michael Tokarev wrote:
> Antoine Martin wrote:
>    
>> I've tried various guests, including most recent Fedora12 kernels,
>> custom 2.6.32.x
>> All of them hang around the same point (~1GB written) when I do heavy IO
>> write inside the guest.
>>      
> []
>    
>> Host is running: 2.6.31.4
>> QEMU PC emulator version 0.10.50 (qemu-kvm-devel-88)
>>      
> Please update to last version and repeat.  kvm-88 is ancient and
> _lots_ of stuff fixed and changed since that time, I doubt anyone
> here will try to dig into kvm-88 problems.
>
> Current kvm is qemu-kvm-0.12.2, released yesterday.
>    
Sorry about that, I didn't realize 88 was so far behind.
Upgrading to qemu-kvm-0.12.2 did solve my IO problems.


Found these build issues if anyone is interested:
"--enable-io-thread" gave me:
   LINK  x86_64-softmmu/qemu-system-x86_64
kvm-all.o: In function `qemu_mutex_lock_iothread':
/usr/src/KVM/qemu-kvm-0.12.2/qemu-kvm.c:2526: multiple definition of 
`qemu_mutex_lock_iothread'
vl.o:/usr/src/KVM/qemu-kvm-0.12.2/vl.c:3772: first defined here
kvm-all.o: In function `qemu_mutex_unlock_iothread':
/usr/src/KVM/qemu-kvm-0.12.2/qemu-kvm.c:2520: multiple definition of 
`qemu_mutex_unlock_iothread'
vl.o:/usr/src/KVM/qemu-kvm-0.12.2/vl.c:3783: first defined here
collect2: ld returned 1 exit status

And "--enable-cap-kvm-pit" is defined if you look at "--help", but does 
not exist if you try to use it!?
# ./configure --enable-cap-kvm-pit | grep cap-kvm-pit
ERROR: unknown option --enable-cap-kvm-pit
   --disable-cap-kvm-pit    disable KVM pit support
   --enable-cap-kvm-pit     enable KVM pit support

Antoine