On (20/10/22 13:38), Petr Mladek wrote:
> > Hmm. How about this. console= is undocumented and unspecified - it
> > may work sometimes or it may kill the system (and theoretically even
> > corrupt some files, depending on what fd 1 and fd 2 point to). So
> > maybe we can document console= and handle
On Thu 2020-10-08 14:52:38, Sergey Senozhatsky wrote:
> On (20/10/08 01:29), Sergey Senozhatsky wrote:
> > On (20/10/07 08:57), Guenter Roeck wrote:
> > > On 10/7/20 5:30 AM, Sergey Senozhatsky wrote:
> >
> > [..]
> >
> > > I can see to options: Link /dev/console to /dev/null if there is no
> >
On (20/10/08 21:20), Sergey Senozhatsky wrote:
[..]
> > > Let me dump my findings so far. I still don't understand what exactly
> > > crashes the laptop (blank screen is not very helpful).
> > >
> > > So, things start with the "preferred_console = -1". In console_setup()
> > > we call __add_prefer
On (20/10/08 10:50), Petr Mladek wrote:
> On Wed 2020-10-07 21:30:44, Sergey Senozhatsky wrote:
> > On (20/10/07 09:28), Petr Mladek wrote:
> > >
> > > /*
> > >* Dirty hack to prevent using any console with tty
> > >* binding as a fallback and adding the empty
> >
On (20/10/08 11:01), Petr Mladek wrote:
>
> + it is yet another way to affect the amount of messages
> on console. We already have console_loglevel, ignore_loglevel.
True. Yes, there are "alternative" ways of doing this, but what we
have to face here is - console= has been used for a long t
On (20/10/08 11:01), Petr Mladek wrote:
>
> Interesting idea. Well, it looks like yet another mess:
>
> + it would show the consoles in /proc/consoles
> even thought they will be basically unusable
Which is fine, no? We already can have disables consoles in
/proc/consoles.
$ cat /proc/co
On Thu 2020-10-08 14:52:38, Sergey Senozhatsky wrote:
> On (20/10/08 01:29), Sergey Senozhatsky wrote:
> > On (20/10/07 08:57), Guenter Roeck wrote:
> > > On 10/7/20 5:30 AM, Sergey Senozhatsky wrote:
> >
> > [..]
> >
> > > I can see to options: Link /dev/console to /dev/null if there is no
> >
On Wed 2020-10-07 21:30:44, Sergey Senozhatsky wrote:
> On (20/10/07 09:28), Petr Mladek wrote:
> >
> > /*
> > * Dirty hack to prevent using any console with tty
> > * binding as a fallback and adding the empty
> > * name into console_cmdline arra
On (20/10/08 01:29), Sergey Senozhatsky wrote:
> On (20/10/07 08:57), Guenter Roeck wrote:
> > On 10/7/20 5:30 AM, Sergey Senozhatsky wrote:
>
> [..]
>
> > I can see to options: Link /dev/console to /dev/null if there is no console,
> > or do something like
> >
> > if (IS_ERR(file)) {
> >
On (20/10/07 08:57), Guenter Roeck wrote:
> On 10/7/20 5:30 AM, Sergey Senozhatsky wrote:
[..]
> I can see to options: Link /dev/console to /dev/null if there is no console,
> or do something like
>
> if (IS_ERR(file)) {
> pr_warn("Warning: unable to open an initial console
On 10/7/20 5:30 AM, Sergey Senozhatsky wrote:
[ ... ]
>
> console_on_rootfs() attempts to filp_open()->tty_open() /dev/console.
> This ends up in printk's console_device(), which iterates the list of
> console drivers and returns associated console->device back to tty. The
> problem is that consol
On (20/10/07 21:30), Sergey Senozhatsky wrote:
> On (20/10/07 09:28), Petr Mladek wrote:
> >
> > /*
> > * Dirty hack to prevent using any console with tty
> > * binding as a fallback and adding the empty
> > * name into console_cmdline array.
> >
On (20/10/07 09:28), Petr Mladek wrote:
>
> /*
>* Dirty hack to prevent using any console with tty
>* binding as a fallback and adding the empty
>* name into console_cmdline array.
>*/
> preferred_console =
On Wed 2020-10-07 02:15:04, Sergey Senozhatsky wrote:
> On (20/10/06 18:35), Petr Mladek wrote:
> > > > Whatever is decided, I'd like to have it made official and documented to
> > > > avoid a similar problem in the future.
> >
> > Sigh, it is even bigger mess than I expected. There is a magic
> >
On (20/10/06 18:35), Petr Mladek wrote:
> > > Whatever is decided, I'd like to have it made official and documented to
> > > avoid a similar problem in the future.
>
> Sigh, it is even bigger mess than I expected. There is a magic
> variable "console_set_on_cmdline". It used, for example, in
> of_
On Tue 2020-10-06 15:43:28, Petr Mladek wrote:
> On Tue 2020-10-06 03:45:00, Guenter Roeck wrote:
> > On 10/6/20 2:52 AM, Petr Mladek wrote:
> > > And it makes perfect sense to disable all consoles or drop all defined
> > > by dts. But I would prefer to make it more obvious way, for
> > > example b
On (20/10/06 07:22), Guenter Roeck wrote:
> On 10/6/20 6:33 AM, Sergey Senozhatsky wrote:
> > On (20/10/06 11:54), Petr Mladek wrote:
> >> On Tue 2020-10-06 15:59:07, Sergey Senozhatsky wrote:
> >>> On (20/10/05 20:35), Guenter Roeck wrote:
> On a side note, I don't see the problem presumably
On 10/6/20 6:33 AM, Sergey Senozhatsky wrote:
> On (20/10/06 11:54), Petr Mladek wrote:
>> On Tue 2020-10-06 15:59:07, Sergey Senozhatsky wrote:
>>> On (20/10/05 20:35), Guenter Roeck wrote:
On a side note, I don't see the problem presumably fixed with this
patch in any of my tests.
>>>
>
On Tue 2020-10-06 03:45:00, Guenter Roeck wrote:
> On 10/6/20 2:52 AM, Petr Mladek wrote:
> > And it makes perfect sense to disable all consoles or drop all defined
> > by dts. But I would prefer to make it more obvious way, for
> > example by parameters like:
> >
> >+ console=none
> >+ no
On (20/10/06 11:54), Petr Mladek wrote:
> On Tue 2020-10-06 15:59:07, Sergey Senozhatsky wrote:
> > On (20/10/05 20:35), Guenter Roeck wrote:
> > > On a side note, I don't see the problem presumably fixed with this
> > > patch in any of my tests.
> >
> > Hmm. This is rather interesting. Empty cons
On 10/5/20 10:08 PM, Greg Kroah-Hartman wrote:
> On Mon, Oct 05, 2020 at 08:35:59PM -0700, Guenter Roeck wrote:
>> On 10/5/20 7:59 PM, Sergey Senozhatsky wrote:
>>> Cc-ing Guenter,
>>>
>>> On (20/05/22 12:00), Petr Mladek wrote:
On Fri 2020-05-22 16:53:06, Shreyas Joshi wrote:
> If uboot p
On 10/6/20 2:52 AM, Petr Mladek wrote:
> On Mon 2020-10-05 20:35:59, Guenter Roeck wrote:
>> On 10/5/20 7:59 PM, Sergey Senozhatsky wrote:
>>> On (20/05/22 12:00), Petr Mladek wrote:
On Fri 2020-05-22 16:53:06, Shreyas Joshi wrote:
> If uboot passes a blank string to console_setup then it
On Tue 2020-10-06 15:59:07, Sergey Senozhatsky wrote:
> On (20/10/05 20:35), Guenter Roeck wrote:
> > On a side note, I don't see the problem presumably fixed with this
> > patch in any of my tests.
>
> Hmm. This is rather interesting. Empty console= certainly oops-es my laptop,
Just by chance. D
On Mon 2020-10-05 20:35:59, Guenter Roeck wrote:
> On 10/5/20 7:59 PM, Sergey Senozhatsky wrote:
> > On (20/05/22 12:00), Petr Mladek wrote:
> >> On Fri 2020-05-22 16:53:06, Shreyas Joshi wrote:
> >>> If uboot passes a blank string to console_setup then it results in a
> >>> trashed memory.
> >>>
On (20/10/05 20:35), Guenter Roeck wrote:
> On a side note, I don't see the problem presumably fixed with this
> patch in any of my tests.
Hmm. This is rather interesting. Empty console= certainly oops-es my laptop,
but not the cros board I just tested this on. Do we carry around any chromeos
patc
On Mon, Oct 05, 2020 at 08:35:59PM -0700, Guenter Roeck wrote:
> On 10/5/20 7:59 PM, Sergey Senozhatsky wrote:
> > Cc-ing Guenter,
> >
> > On (20/05/22 12:00), Petr Mladek wrote:
> >> On Fri 2020-05-22 16:53:06, Shreyas Joshi wrote:
> >>> If uboot passes a blank string to console_setup then it res
On 10/5/20 7:59 PM, Sergey Senozhatsky wrote:
> Cc-ing Guenter,
>
> On (20/05/22 12:00), Petr Mladek wrote:
>> On Fri 2020-05-22 16:53:06, Shreyas Joshi wrote:
>>> If uboot passes a blank string to console_setup then it results in a
>>> trashed memory.
>>> Ultimately, the kernel crashes during fr
Cc-ing Guenter,
On (20/05/22 12:00), Petr Mladek wrote:
> On Fri 2020-05-22 16:53:06, Shreyas Joshi wrote:
> > If uboot passes a blank string to console_setup then it results in a
> > trashed memory.
> > Ultimately, the kernel crashes during freeing up the memory. This fix
> > checks if there
>
On Fri 2020-05-22 16:53:06, Shreyas Joshi wrote:
> If uboot passes a blank string to console_setup then it results in a trashed
> memory.
> Ultimately, the kernel crashes during freeing up the memory. This fix checks
> if there
> is a blank parameter being passed to console_setup from uboot.
> In
If uboot passes a blank string to console_setup then it results in a trashed
memory.
Ultimately, the kernel crashes during freeing up the memory. This fix checks if
there
is a blank parameter being passed to console_setup from uboot.
In case it detects that the console parameter is blank then
it
If uboot passes a blank string to console_setup then it results in a trashed
memory.
Ultimately, the kernel crashes during freeing up the memory. This fix checks if
there
is a blank parameter being passed to console_setup from uboot.
In case it detects that the console parameter is blank then
it
If uboot passes a blank string to console_setup then it results in a trashed
memory.
Ultimately, the kernel crashes during freeing up the memory. This fix checks if
there
is a blank parameter being passed to console_setup from uboot.
In case it detects that the console parameter is blank then
it
On (20/05/15 17:24), Petr Mladek wrote:
[..]
> > diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> > index ad4606234545..e9ad730991e0 100644
> > --- a/kernel/printk/printk.c
> > +++ b/kernel/printk/printk.c
> > @@ -2165,7 +2165,10 @@ static int __init console_setup(char *str)
> > c
On Mon 2020-03-09 15:29:15, Shreyas Joshi wrote:
> If uboot passes a blank string to console_setup then it results in a trashed
> memory.
> Ultimately, the kernel crashes during freeing up the memory. This fix checks
> if there
> is a blank parameter being passed to console_setup from uboot.
> In
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