On Thu, 7 May 2009, Rafael J. Wysocki wrote:
> Unfortunately it fails too quickly with the combination as well, so it looks
> like we can't use __GFP_NORETRY during hibernation.
>
If you know that no other tasks are in the oom killer at suspend time, you
can do what I mentioned earlier:
struct zone *z;
for_each_populated_zone(z)
zone_set_flag(z, ZONE_OOM_LOCKED);
and then later
for_each_populated_zone(z)
zone_clear_flag(z, ZONE_OOM_LOCKED);
The only race there is if a task is currently in the oom killer and will
subsequently clear ZONE_OOM_LOCKED for its zonelist.
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