On Thu, Jan 31, 2019 at 11:47:54AM +0100, Peter Zijlstra wrote:
> > + local_irq_save(flags);
> > + __bpf_spin_lock(lock);
> > + this_cpu_write(irqsave_flags, flags);
>
> __this_cpu_write()
sure. will do
On Wed, Jan 30, 2019 at 09:05:38PM -0800, Alexei Starovoitov wrote:
> Introduce 'struct bpf_spin_lock' and bpf_spin_lock/unlock() helpers to let
> bpf program serialize access to other variables.
>
> Example:
> struct hash_elem {
> int cnt;
> struct bpf_spin_lock lock;
> };
> struct hash_e
Introduce 'struct bpf_spin_lock' and bpf_spin_lock/unlock() helpers to let
bpf program serialize access to other variables.
Example:
struct hash_elem {
int cnt;
struct bpf_spin_lock lock;
};
struct hash_elem * val = bpf_map_lookup_elem(&hash_map, &key);
if (val) {
bpf_spin_lock(&val->l
