On Sun, 4 Apr 2021 21:27:00 -0400
Waiman Long wrote:
> Thanks for the suggestion, but it also sound complicated.
It's not that complicated. Similar tricks have been used elsewhere in the
kernel.
>
> I think we can fix this lockup problem if we are willing to lose some
It's not a lockup
On 4/4/21 9:27 PM, Waiman Long wrote:
On 4/4/21 12:02 PM, Steven Rostedt wrote:
On Fri, 2 Apr 2021 23:09:09 -0400
Waiman Long wrote:
The main problem with sched_debug_lock is that under certain
circumstances, a lock waiter may wait a long time to acquire the lock
(in seconds). We can't
On 4/4/21 12:02 PM, Steven Rostedt wrote:
On Fri, 2 Apr 2021 23:09:09 -0400
Waiman Long wrote:
The main problem with sched_debug_lock is that under certain
circumstances, a lock waiter may wait a long time to acquire the lock
(in seconds). We can't insert touch_nmi_watchdog() while the cpu is
On Fri, 2 Apr 2021 23:09:09 -0400
Waiman Long wrote:
> The main problem with sched_debug_lock is that under certain
> circumstances, a lock waiter may wait a long time to acquire the lock
> (in seconds). We can't insert touch_nmi_watchdog() while the cpu is
> waiting for the spinlock.
The
On 4/2/21 4:40 PM, Steven Rostedt wrote:
On Thu, 1 Apr 2021 14:10:30 -0400
Waiman Long wrote:
The handling of sysrq key can be activated by echoing the key to
/proc/sysrq-trigger or via the magic key sequence typed into a terminal
that is connected to the system in some way (serial, USB or
On Thu, 1 Apr 2021 14:10:30 -0400
Waiman Long wrote:
> The handling of sysrq key can be activated by echoing the key to
> /proc/sysrq-trigger or via the magic key sequence typed into a terminal
> that is connected to the system in some way (serial, USB or other mean).
> In the former case, the
The handling of sysrq key can be activated by echoing the key to
/proc/sysrq-trigger or via the magic key sequence typed into a terminal
that is connected to the system in some way (serial, USB or other mean).
In the former case, the handling is done in a user context. In the
latter case, it is
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