Re: [PATCH v2 0/2] printk: Reduce unnecessary wait times by pr_flush()

[John Ogness]

On 2023-10-10, Petr Mladek <pmladek@xxxxxxxx> wrote:
>> This is an updated version of the patch
>> https://lore.kernel.org/r/20230929113233.863824-1-john.ogness@xxxxxxxxxxxxx
>> 
>> Changes since v1:
>> 
>>   + Split reduction of the pooling time into separate patch.
>>   + Use jiffies to count the real sleeping time.
>> 
>> Note that my original POC counted jiffies spent in the entire cycle.
>> It would count also the time spent by console_lock() and by flushing
>> the legacy consoles in console_unlock().
>> 
>> The current version counts only the time spent by msleep(1) aka
>> the pooling interval.
>> 
>> 
>> John Ogness (1):
>>   printk: flush consoles before checking progress
>> 
>> Petr Mladek (1):
>>   printk: Reduce pr_flush() pooling time
>
> JFYI, the patchset has been committed into printk/linux.git,
> branch rework/misc-cleanups.
>
> I am going to push it in the next merge window for 6.7.
> IMHO, the issue is not critical and we are already at 6.6-rc5.

It is a real regression. I think it is important that it goes into
6.6. At least the first patch is simple enough and fixes the regression.

John