linux-kernel - [PATCH v2 0/2] printk: Reduce unnecessary wait times by pr

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Message-Id: <20231006082151.6969-1-pmladek@suse.com>
Date:   Fri,  6 Oct 2023 10:21:49 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     John Ogness <john.ogness@...utronix.de>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Todd Brandt <todd.e.brandt@...el.com>,
        linux-kernel@...r.kernel.org, Petr Mladek <pmladek@...e.com>
Subject: [PATCH v2 0/2] printk: Reduce unnecessary wait times by pr_flush()

This is an updated version of the patch
https://lore.kernel.org/r/20230929113233.863824-1-john.ogness@linutronix.de

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

 kernel/printk/printk.c | 34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

-- 
2.35.3