Re: xfsdump stuck in io_schedule

[Andi Kleen <ak@xxxxxxx>]

> xfsdump: page allocation failure. order:0, mode:0x0
> xfsdump: page allocation failure. order:0, mode:0x0
> ...

It somehow manages to run out of memory and then blocks trying to free some.
You can do cat /proc/slabinfo and see if there are any suspicious leaks of 
objects (compare before and after dump) You can also do Shift-ScrLock on 
the console to dump some memory information and run vmstat doing the dump.

The 2.5 VM is still rather untuned, so you may just run into some generic
VM problem. 

-Andi