Re: [PATCH v2 net-next 0/12] bpf: map pre-alloc

From: Alexei Starovoitov
Date: Tue Mar 08 2016 - 11:40:10 EST

On 3/8/16 1:13 AM, Daniel Wagner wrote:
Some time back Daniel Wagner reported crashes when bpf hash map is
>used to compute time intervals between preempt_disable->preempt_enable
>and recently Tom Zanussi reported a dead lock in iovisor/bcc/funccount
>tool if it's used to count the number of invocations of kernel
>'*spin*' functions. Both problems are due to the recursive use of
>slub and can only be solved by pre-allocating all map elements.
I gave it a short spin and lathist sample works just fine.

awesome. Thanks for testing!