On Fri 2016-09-30 10:05:28, Sergey Senozhatsky wrote:
> On (09/29/16 14:26), Petr Mladek wrote:
> [..]
> > > printk()
> > > local_irq_save()
> > > alt_printk_enter()
> >
> > We need to make sure that exit() is called on the same CPU.
> > Therefore we need to disable preemption as well.
>
> l
On (09/29/16 14:26), Petr Mladek wrote:
[..]
> > printk()
> > local_irq_save()
> > alt_printk_enter()
>
> We need to make sure that exit() is called on the same CPU.
> Therefore we need to disable preemption as well.
local_irq_save() does this for us, we can't get sched tick or
re-sched IPI,
On Tue 2016-09-27 23:22:33, Sergey Senozhatsky wrote:
> This patch extends the idea of NMI per-cpu buffers to regions
> that may cause recursive printk() calls and possible deadlocks.
> Namely, printk() can't handle printk calls from schedule code
> or printk() calls from lock debugging code (spin_
This patch extends the idea of NMI per-cpu buffers to regions
that may cause recursive printk() calls and possible deadlocks.
Namely, printk() can't handle printk calls from schedule code
or printk() calls from lock debugging code (spin_dump() for instance);
because those may be called with `sem->l
4 matches
Mail list logo
