Re: MM patches against 2.5.31

[Andrew Morton]

"Martin J. Bligh" wrote:
> 
> > kjournald: page allocation failure. order:0, mode:0x0
> 
> I've seen this before, but am curious how we ever passed
> a gfpmask (aka mode) of 0 to __alloc_pages? Can't see anywhere
> that does this?

Could be anywhere, really.  A network interrupt doing GFP_ATOMIC
while kjournald is executing.  A radix-tree node allocation 
on the add-to-swap path perhaps.  (The swapout failure messages
aren't supposed to come out, but mempool_alloc() stomps on the
caller's setting of PF_NOWARN.)

Or:

mnm:/usr/src/25> grep -r GFP_ATOMIC drivers/scsi/*.c | wc -l
     89