Re: __alloc_pages: 2-order allocation failed

[Mike Edwards <sauron-debian-sparc@psychology.rutgers.edu>]

David, do you know if anything further was done on this issue?

Thanks.


On Fri, Apr 29, 2005 at 09:52:17AM -0700, David S. Miller said:
> On Fri, 29 Apr 2005 10:47:54 -0400
> Mike Edwards <sauron-debian-sparc@psychology.rutgers.edu> wrote:
> 
> > Apr 29 08:45:34 psychology kernel: __alloc_pages: 2-order allocation failed (gfp=0x20/0)
> > Apr 29 08:45:34 psychology kernel: __alloc_pages: task(spamc) pid(25917) caller(000000000046edc0)
> > Apr 29 08:45:34 psychology kernel: DEBUG: __get_free_pages() order 2 failed called by 000000000046aaa8
>  ...
> > 000000000046a9c0 t kmem_cache_grow
> > 000000000046ad00 T kmem_cache_alloc_batch
> 
> Does spamc use AF_UNIX sockets to communicate with other
> processes?  If so, someone should audit it to make sure it
> checks properly for return values on write() calls.
> 
> If spamc uses non-blocking AF_UNIX sockets, -ENOBUFS can
> happen under normal circumstances.  If the sockets were
> blocking then the kernel could sleep to swap out some pages
> to free up some space and then the call could succeed.
> 
> A quick perusal of the spamc sources seems to indicate
> that it does use non-blocking AF_UNIX sockets as the
> transport to talk to the spamassasindaemon.  I'm on
> vacation so cannot investigate this more deeply.
> 
> 
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-- 
Mike Edwards <sauron-debian-sparc@psychology.rutgers.edu>
System Administrator
Psychology Department, Rutgers University, Newark campus