On Fri, Mar 23, 2018 at 01:21:43AM +1100, Bruce Evans wrote:
> I don't like having a whole task for this. The whole thing is just a
> hack to work around some the upper layers of the tty driver and some
> lower layers not having any input [escape] sequences to control the
> kernel. Only the sysco
On Thu, Mar 22, 2018 at 5:42 AM, Konstantin Belousov
wrote:
> On Thu, Mar 22, 2018 at 05:50:57PM +1100, Bruce Evans wrote:
> > On Wed, 21 Mar 2018, Warner Losh wrote:
> >
> > > On Wed, Mar 21, 2018 at 2:27 PM, Konstantin Belousov <
> kostik...@gmail.com>
> > > wrote:
> > >> ...
> > >> Are you say
On Thu, 22 Mar 2018, Konstantin Belousov wrote:
On Thu, Mar 22, 2018 at 05:50:57PM +1100, Bruce Evans wrote:
On Wed, 21 Mar 2018, Warner Losh wrote:
On Wed, Mar 21, 2018 at 2:27 PM, Konstantin Belousov
wrote:
...
Are you saying that fast interrupt handlers call shutdown_nice() ? This
is th
On Thu, Mar 22, 2018 at 05:50:57PM +1100, Bruce Evans wrote:
> On Wed, 21 Mar 2018, Warner Losh wrote:
>
> > On Wed, Mar 21, 2018 at 2:27 PM, Konstantin Belousov
> > wrote:
> >> ...
> >> Are you saying that fast interrupt handlers call shutdown_nice() ? This
> >> is the quite serious bug on its
On Wed, 21 Mar 2018, Warner Losh wrote:
On Wed, Mar 21, 2018 at 2:27 PM, Konstantin Belousov
wrote:
...
Are you saying that fast interrupt handlers call shutdown_nice() ? This
is the quite serious bug on its own. To fix it, shutdown_nice() should
use a fast taskqueue to schedule the task whi
On Wed, 21 Mar 2018, Warner Losh wrote:
On Wed, Mar 21, 2018 at 11:53 AM, Bruce Evans wrote:
On Wed, 21 Mar 2018, Warner Losh wrote:
Log:
Unlock giant when calling shutdown_nice()
This breaks the driver. Giant is syscons' driver lock, and also the
interrupt handler lock for at least the
On Wed, 21 Mar 2018, Konstantin Belousov wrote:
On Thu, Mar 22, 2018 at 04:53:22AM +1100, Bruce Evans wrote:
Serial console drivers with fast interrupt handlers have much more
broken locking for ddb special keys. It is invalid to either drop locks
or call the "any" function from a fast interru
On Wed, Mar 21, 2018 at 2:27 PM, Konstantin Belousov
wrote:
> On Thu, Mar 22, 2018 at 04:53:22AM +1100, Bruce Evans wrote:
> > Serial console drivers with fast interrupt handlers have much more
> > broken locking for ddb special keys. It is invalid to either drop locks
> > or call the "any" func
On Wed, Mar 21, 2018 at 11:53 AM, Bruce Evans wrote:
> On Wed, 21 Mar 2018, Warner Losh wrote:
>
> Log:
>> Unlock giant when calling shutdown_nice()
>>
>
> This breaks the driver. Giant is syscons' driver lock, and also the
> interrupt handler lock for at least the atkbd keyboard driver, so vt
On Thu, Mar 22, 2018 at 04:53:22AM +1100, Bruce Evans wrote:
> Serial console drivers with fast interrupt handlers have much more
> broken locking for ddb special keys. It is invalid to either drop locks
> or call the "any" function from a fast interrupt handler, but buggy
> serial console drivers
On Thu, 22 Mar 2018, Bruce Evans wrote:
On Wed, 21 Mar 2018, Warner Losh wrote:
Log:
Unlock giant when calling shutdown_nice()
...
This breaks the driver. Giant is syscons' driver lock, and also the
interrupt handler lock for at least the atkbd keyboard driver, so vt
sometimes holds the loc
On Wed, 21 Mar 2018, Warner Losh wrote:
Log:
Unlock giant when calling shutdown_nice()
This breaks the driver. Giant is syscons' driver lock, and also the
interrupt handler lock for at least the atkbd keyboard driver, so vt
sometimes holds the lock for.
vt has to sprinkle lots of Giant lock
Author: imp
Date: Wed Mar 21 14:47:12 2018
New Revision: 331298
URL: https://svnweb.freebsd.org/changeset/base/331298
Log:
Unlock giant when calling shutdown_nice()
Modified:
head/sys/dev/syscons/syscons.c
Modified: head/sys/dev/syscons/syscons.c
=
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