Hallo all, on my last train trip i noticed that ath9k-rng produce continuous 15% cpu load. Probably two factor coused this issue: - my STA was not associated with any AP - on the road there is enough noise.
from why i see, this code has all reasons to consume all CPU time it
get, so far ath9k_rng_data_read can provide some data.
while (!kthread_should_stop()) {
bytes_read = ath9k_rng_data_read(sc, rng_buf,
ATH9K_RNG_BUF_SIZE);
if (unlikely(!bytes_read)) {
msleep_interruptible(10);
continue;
}
/* sleep until entropy bits under write_wakeup_threshold */
add_hwgenerator_randomness((void *)rng_buf, bytes_read,
ATH9K_RNG_ENTROPY(bytes_read));
}
--
Regards,
Oleksij
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