On 09/02/20(Sun) 16:40, Visa Hankala wrote:
> [...]
> In addition,
> IPL_AUDIO is above IPL_MPFLOOR on some architectures.
That's because audio interrupt handlers have been considered MP-safe, we
now know they aren't 8)
On Tue, Feb 04, 2020 at 02:21:02PM +0100, Martin Pieuchot wrote:
> void
> selwakeup(struct selinfo *sip)
> {
> + KERNEL_LOCK();
> + KNOTE(&sip->si_note, NOTE_SUBMIT);
> + doselwakeup(sip);
> + KERNEL_UNLOCK();
> +}
There is a problem with audio code. Audio interrupt handlers gen
On Tue, Feb 04, 2020 at 02:21:02PM +0100, Martin Pieuchot wrote:
> As recently profiled, the softnet thread which runs mostly without
> KERNEL_LOCK() is still somehow serialized with the rest of the kernel.
> This is because the various subsystems to notify userland, either via
> poll(2)/select(2),
As recently profiled, the softnet thread which runs mostly without
KERNEL_LOCK() is still somehow serialized with the rest of the kernel.
This is because the various subsystems to notify userland, either via
poll(2)/select(2), kqueue(2) or pgsignal(9) still require this lock.
We worked around thi
