On Tue 2021-03-23 22:32:00, John Ogness wrote:
> On 2021-03-22, Petr Mladek wrote:
> > On Wed 2021-03-17 00:33:24, John Ogness wrote:
> >> Track printk() recursion and limit it to 3 levels per-CPU and per-context.
> >
> >> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> >> index
On 2021-03-22, Petr Mladek wrote:
> On Wed 2021-03-17 00:33:24, John Ogness wrote:
>> Track printk() recursion and limit it to 3 levels per-CPU and per-context.
>
> Please, explain why it is added. I mean that it will
> allow remove printk_safe that provides recursion protection at the
> moment.
On Mon 2021-03-22 20:13:51, Sergey Senozhatsky wrote:
> On (21/03/22 11:53), John Ogness wrote:
> > On 2021-03-21, Sergey Senozhatsky wrote:
> > >> @@ -2055,6 +2122,9 @@ int vprintk_store(int facility, int level,
> > >> */
> > >> ts_nsec = local_clock();
> > >>
> > >> +
On Wed 2021-03-17 00:33:24, John Ogness wrote:
> Track printk() recursion and limit it to 3 levels per-CPU and per-context.
Please, explain why it is added. I mean that it will
allow remove printk_safe that provides recursion protection at the
moment.
> Signed-off-by: John Ogness
> ---
>
On (21/03/22 11:53), John Ogness wrote:
> On 2021-03-21, Sergey Senozhatsky wrote:
> >> @@ -2055,6 +2122,9 @@ int vprintk_store(int facility, int level,
> >> */
> >>ts_nsec = local_clock();
> >>
> >> + if (!printk_enter_irqsave())
> >> + return 0;
> >
> > I guess it can be
On 2021-03-21, Sergey Senozhatsky wrote:
>> @@ -2055,6 +2122,9 @@ int vprintk_store(int facility, int level,
>> */
>> ts_nsec = local_clock();
>>
>> +if (!printk_enter_irqsave())
>> +return 0;
>
> I guess it can be interesting to somehow signal us that we had
>
On (21/03/17 00:33), John Ogness wrote:
[..]
> static inline void printk_delay(void)
> @@ -2040,11 +2105,13 @@ int vprintk_store(int facility, int level,
> struct prb_reserved_entry e;
> enum log_flags lflags = 0;
> struct printk_record r;
> + unsigned long irqflags;
>
Track printk() recursion and limit it to 3 levels per-CPU and per-context.
Signed-off-by: John Ogness
---
kernel/printk/printk.c | 80 --
1 file changed, 77 insertions(+), 3 deletions(-)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index
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