From: Petr Mladek <pmladek@suse.com>
To: John Ogness <john.ogness@linutronix.de>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Todd Brandt <todd.e.brandt@intel.com>,
linux-kernel@vger.kernel.org, Petr Mladek <pmladek@suse.com>
Subject: [PATCH v2 0/2] printk: Reduce unnecessary wait times by pr_flush()
Date: Fri, 6 Oct 2023 10:21:49 +0200 [thread overview]
Message-ID: <20231006082151.6969-1-pmladek@suse.com> (raw)
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
next reply other threads:[~2023-10-06 8:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-06 8:21 Petr Mladek [this message]
2023-10-06 8:21 ` [PATCH v2 1/2] printk: flush consoles before checking progress Petr Mladek
2023-10-06 8:21 ` [PATCH v2 2/2] printk: Reduce pr_flush() pooling time Petr Mladek
2023-10-06 10:12 ` John Ogness
2023-10-10 8:44 ` [PATCH v2 0/2] printk: Reduce unnecessary wait times by pr_flush() Petr Mladek
2023-10-10 11:38 ` John Ogness
2023-10-11 12:10 ` Petr Mladek
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