Re: Out of Memory: Killed process 16498 (java).

[Larry Woodman <lwoodman@redhat.com>]

Andy Chittenden wrote:

>>Andy, what are
>>you running that uses SG_IO - cd ripping, burning, something else?
>>    
>>
>
>I'm sorry but I haven't a clue what uses SG_IO! All I did was boot up a
>debian unstable machine on my amd64 machine that uses 2.6.15. I log in
>via gdm and get a gnome session so I guess that's using nautilus (I've
>seen that killed in the past). I use the sawfish window manager and
>start up 7 rxvt windows and that java app I mentioned (terminator) (I
>suspect that's a red herring as other processes have been killed).
>
>  
>
for starters you should probably change build_zonelists so that the DMA 
zone is
not included in any of the zone lists except the DMA.  This will prevent 
__alloc_pages()
from exhausting the hignmem/normal zones then falling into the DMA zone 
and exhausting
that with non-reclamable memory like the slabcache.

--- linux-2.6.9/mm/page_alloc.c.orig
+++ linux-2.6.9/mm/page_alloc.c
@@ -1170,6 +1170,9 @@ static int __init build_zonelists_node(p
                zone = pgdat->node_zones + ZONE_NORMAL;
                if (zone->present_pages)
                        zonelist->zones[j++] = zone;
+#if defined(CONFIG_HIGHMEM64G) || defined(CONFIG_X86_64)
+               break;
+#endif
        case ZONE_DMA:
                zone = pgdat->node_zones + ZONE_DMA;
                if (zone->present_pages)
~