Re: [PATCH v2 3/3] bpf: hash: use per-bucket spinlock

On 12/29/2015 03:40 PM, Ming Lei wrote: Both htab_map_update_elem() and htab_map_delete_elem() can be called from eBPF program, and they may be in kernel hot path, so it isn't efficient to use a per-hashtable lock in this two helpers. The per-hashtable spinlock is used for protecting bucket's hl

[PATCH v2 3/3] bpf: hash: use per-bucket spinlock

Both htab_map_update_elem() and htab_map_delete_elem() can be called from eBPF program, and they may be in kernel hot path, so it isn't efficient to use a per-hashtable lock in this two helpers. The per-hashtable spinlock is used for protecting bucket's hlist, and per-bucket lock is just enough. T