RE: [PATCH net 0/3] Fix for BPF devmap percpu allocation splat

From: Daniel Borkmann

Sent: 17 October 2017 15:56

The set fixes a splat in devmap percpu allocation when we alloc
the flush bitmap. Patch 1 is a prerequisite for the fix in patch 2,
patch 1 is rather small, so if this could be routed via -net, for
example, with Tejun's Ack that would be good. Patch 3 gets rid of
remaining PCPU_MIN_UNIT_SIZE checks, which are percpu allocator
internals and should not be used.

Does it make sense to allow the user program to try to allocate ever
smaller very large maps until it finds one that succeeds - thus
using up all the percpu space?

Or is this a 'root only' 'shoot self in foot' job?

	David