On 06/29/2011 08:14 PM, Josef Bacik wrote:

quoted

Ok - I upgrade to 2.6.39-2 but it is seems to all things get worse.
Now I see [btrfs-transacti]&  btrfs-endio-wri] 80-100% all the time and
io performance looks like lower then before.

Our scribe daemon in state D most of the time with half of a normal
load. Only kernel was changed.

Any performance tune recommendation?

Can you get sysrq+w while this problem is happening so we can see whats
going on?  Thanks,

I attached sysrq+w. Hope it helps.

-- 
Best regards,
Proskurin Kirill