Hi,
> From: Ulrich Hecht, Sent: Thursday, February 15, 2018 9:02 PM
>
> When the TTY buffers fill up to the configured maximum, a system lockup
> occurs:
>
> [ 598.820128] INFO: rcu_preempt detected stalls on CPUs/tasks:
> [ 598.825796] 0-...!: (1 GPs behind) idle=5a6/2/0 softirq=1974/1974 fq
Hi Greg,
On Fri, Feb 16, 2018 at 7:44 PM, Greg KH wrote:
> On Thu, Feb 15, 2018 at 01:02:27PM +0100, Ulrich Hecht wrote:
>> When the TTY buffers fill up to the configured maximum, a system lockup
>> occurs:
>>
>> [ 598.820128] INFO: rcu_preempt detected stalls on CPUs/tasks:
>> [ 598.825796] 0
Hi Uli,
On Fri, Feb 16, 2018 at 3:27 PM, Ulrich Hecht
wrote:
> On Thu, Feb 15, 2018 at 2:12 PM, Wolfram Sang wrote:
>>> This can be prevented by doing a dummy read of the RX data register.
>>
>> Just so I understand the issue correctly: We are reading the register to
>> throw the content away to
On Thu, Feb 15, 2018 at 01:02:27PM +0100, Ulrich Hecht wrote:
> When the TTY buffers fill up to the configured maximum, a system lockup
> occurs:
>
> [ 598.820128] INFO: rcu_preempt detected stalls on CPUs/tasks:
> [ 598.825796] 0-...!: (1 GPs behind) idle=5a6/2/0 softirq=1974/1974 fqs=1
> [ 5
On Thu, Feb 15, 2018 at 2:12 PM, Wolfram Sang wrote:
>
>> This can be prevented by doing a dummy read of the RX data register.
>
> Just so I understand the issue correctly: We are reading the register to
> throw the content away to prevent it being used in the TTY buffers?
Not quite. The problem
> This can be prevented by doing a dummy read of the RX data register.
Just so I understand the issue correctly: We are reading the register to
throw the content away to prevent it being used in the TTY buffers?
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