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Re: [Fedora-xen] Goodbye Xen on RH/Fedora?



On Wed, Jan 21, 2009 at 11:47:55AM +0000, M A Young wrote:
> On Wed, 21 Jan 2009, Jan ONDREJ (SAL) wrote:
>
>> On Wed, Jan 21, 2009 at 11:44:35AM +0200, Neil Thompson wrote:
>>> On Wed, Jan 21, 2009 at 08:15:00AM +0000, Evan Lavelle wrote:
>>> RHEL (and CentOS) 5.3 has support for Fedora 10 (and above) domUs, and Fedora 11
>>> should have, as well.
>>
>> Just there is at least one critical problem with Fedora 10 DomU and also one
>> for Fedora 9 DomU, so Fedora 10 kernels can't run stable. :(
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=478414
>
> That might actually be nothing to do with xen. Dovecot provides a very  
> successful way of hammering the file locking code, and you might just be  
> exposing bugs or race conditions in the underlying kernel rather than the 
> xen specific code. I suggest you check to see if the processes involved  
> are waiting to access locked files.

I know, why dovecot fails. And it's not only dovecot, also mysql, apache,
... This bug describes only one example, when I was able to make some logs.

My problem is, that command "sync" and may be similar kernel function called
from dovecot, mysql, ... stays in "D" state. File cache is not stored on my
media. I can read all changed data back from cache, but they are not stored
on disks. After reboot all data written to cache is lost.

May be my english is not perfect, I am sorry. :(

			SAL


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