Hi Alexei, On 03/08/2016 06:57 AM, Alexei Starovoitov wrote: > v1->v2: > . fix few issues spotted by Daniel > . converted stackmap into pre-allocation as well > . added a workaround for lockdep false positive > . added pcpu_freelist_populate to be used by hashmap and stackmap > > this path set switches bpf hash map to use pre-allocation by default > and introduces BPF_F_NO_PREALLOC flag to keep old behavior for cases > where full map pre-allocation is too memory expensive. > > 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. cheers, daniel
