On Mon, Mar 22, 2021 at 05:59:17PM +0100, Sebastian Andrzej Siewior wrote:
> On 2021-03-22 12:42:00 [-0400], Alan Stern wrote:
> > What happens on RT systems? Are they smart enough to avoid the whole
> > problem by enabling interrupts during _all_ callbacks?
>
> tl;dr: Yes.
>
> The referenced
On 2021-03-22 12:42:00 [-0400], Alan Stern wrote:
> What happens on RT systems? Are they smart enough to avoid the whole
> problem by enabling interrupts during _all_ callbacks?
tl;dr: Yes.
The referenced commit (id 81e2073c175b) disables interrupts only on !RT
configs so for RT everything
On Mon, Mar 22, 2021 at 12:12:49PM +0100, Johan Hovold wrote:
> Force-threaded interrupt handlers used to run with interrupts enabled,
> something which could lead to deadlocks in case a threaded handler
> shared a lock with code running in hard interrupt context (e.g. timer
> callbacks) and did
Force-threaded interrupt handlers used to run with interrupts enabled,
something which could lead to deadlocks in case a threaded handler
shared a lock with code running in hard interrupt context (e.g. timer
callbacks) and did not explicitly disable interrupts.
Since commit 81e2073c175b ("genirq:
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