On Mon, Dec 06, 2004 at 11:24:34AM +0900, Sakai Yasutoshi wrote:
> We are running linux 2.4.26 on IBM PPC405GP.
> Sometimes our process stuck in 'R' state when number of extent reaches
> And disk cache is freed at same time, so we have 40Mbyte of free memory,
> but we get kernel message "kernel: __alloc_pages: 4-order allocation
> failed (gfp=0xf0/0)".
> Process reverts to normal state after 5 seconds to 20 minutes once in a
> is this XFS problem?
Sort of; XFS has a tendency of asking for contiguous pages,
and the VM has a tendency of not being able to satisfy such
requests -- you might have more luck with a CVS 2.4 kernel,
in particular the split-patches/cache_defs patch there adds
a mechanism for 2.4 kernels to be able to do memory shaking
which the XFS code can plug into. 2.6 provides a mechanism
like that, without need for patching (fwiw).