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From: John Ogness <john.ogness@linutronix.de>
To: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH printk v8 30/35] printk: Add helper for flush type logic
Date: Fri, 23 Aug 2024 07:31:43 +0206	[thread overview]
Message-ID: <87le0nyfmw.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <ZsWvRETyuh1Yq80j@pathway.suse.cz>

On 2024-08-21, Petr Mladek <pmladek@suse.com> wrote:
> <proposal>
> Introduce a new internal struct console_flush_type that specifies which
> which console flushing methods should be used in the context of
> the caller.
> </proposal>
>
>> Introduce a helper function to fill out console_flush_type to
>> be used for flushing call sites.
>> 
>> Replace the logic of all flushing call sites to use the new
>> helper. 
>
> I would add:
>
> <proposal>
> This change standardizes behavior, leading to both fixes and optimizations
> across various call sites. For instance, in console_cpu_notify(), the new
> logic ensures that nbcon consoles are flushed when they aren’t managed
> by the legacy loop. Similarly, in console_flush_on_panic(), the system
> no longer needs to flush nbcon consoles if none are present.
> </proposal>

Sure. It is a nice addition of details. Thanks.

John

  reply	other threads:[~2024-08-23  5:25 UTC|newest]

Thread overview: 84+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-20  6:29 [PATCH printk v8 00/35] wire up write_atomic() printing John Ogness
2024-08-20  6:29 ` [PATCH printk v8 01/35] printk: Add notation to console_srcu locking John Ogness
2024-08-20 17:49   ` Paul E. McKenney
2024-09-09 17:28   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 02/35] printk: nbcon: Consolidate alloc() and init() John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 03/35] printk: Properly deal with nbcon consoles on seq init John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for Petr Mladek
2024-08-20  6:29 ` [PATCH printk v8 04/35] printk: Check printk_deferred_enter()/_exit() usage John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for Sebastian Andrzej Siewior
2024-08-20  6:29 ` [PATCH printk v8 05/35] printk: nbcon: Clarify rules of the owner/waiter matching John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 06/35] printk: nbcon: Remove return value for write_atomic() John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 07/35] printk: nbcon: Add detailed doc " John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 08/35] printk: nbcon: Add callbacks to synchronize with driver John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 09/35] printk: nbcon: Use driver synchronization while (un)registering John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 10/35] serial: core: Provide low-level functions to lock port John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 11/35] serial: core: Introduce wrapper to set @uart_port->cons John Ogness
2024-08-20 11:12   ` Ilpo Järvinen
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 12/35] console: Improve console_srcu_read_flags() comments John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 13/35] nbcon: Add API to acquire context for non-printing operations John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 14/35] serial: core: Acquire nbcon context in port->lock wrapper John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 15/35] printk: nbcon: Do not rely on proxy headers John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 16/35] printk: Make console_is_usable() available to nbcon.c John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 17/35] printk: Let console_is_usable() handle nbcon John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 18/35] printk: Add @flags argument for console_is_usable() John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 19/35] printk: nbcon: Add helper to assign priority based on CPU state John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 20/35] printk: nbcon: Provide function to flush using write_atomic() John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for Thomas Gleixner
2024-08-20  6:29 ` [PATCH printk v8 21/35] printk: Track registered boot consoles John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 22/35] printk: nbcon: Use nbcon consoles in console_flush_all() John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 23/35] printk: Add is_printk_legacy_deferred() John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 24/35] printk: nbcon: Flush new records on device_release() John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 25/35] printk: Flush nbcon consoles first on panic John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 26/35] printk: nbcon: Add unsafe flushing " John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 27/35] printk: Avoid console_lock dance if no legacy or boot consoles John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 28/35] printk: Track nbcon consoles John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 29/35] printk: Coordinate direct printing in panic John Ogness
2024-08-20 15:21   ` Petr Mladek
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 30/35] printk: Add helper for flush type logic John Ogness
2024-08-21  9:11   ` Petr Mladek
2024-08-23  5:25     ` John Ogness [this message]
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:29 ` [PATCH printk v8 31/35] printk: nbcon: Implement emergency sections John Ogness
2024-08-27 14:19   ` John Ogness
2024-09-04 10:34     ` Petr Mladek
2024-09-09 17:27     ` [tip: sched/rt] printk: nbcon: Use raw_cpu_ptr() instead of open coding tip-bot2 for John Ogness
2024-09-09 17:27   ` [tip: sched/rt] printk: nbcon: Implement emergency sections tip-bot2 for Thomas Gleixner
2024-08-20  6:29 ` [PATCH printk v8 32/35] panic: Mark emergency section in warn John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for Thomas Gleixner
2024-08-20  6:29 ` [PATCH printk v8 33/35] panic: Mark emergency section in oops John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:30 ` [PATCH printk v8 34/35] rcu: Mark emergency sections in rcu stalls John Ogness
2024-08-20 17:48   ` Paul E. McKenney
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-20  6:30 ` [PATCH printk v8 35/35] lockdep: Mark emergency sections in lockdep splats John Ogness
2024-09-09 17:27   ` [tip: sched/rt] " tip-bot2 for John Ogness
2024-08-21  9:21 ` [PATCH printk v8 00/35] wire up write_atomic() printing Petr Mladek
2024-08-21  9:28   ` Sebastian Andrzej Siewior
2024-08-21 14:09     ` Petr Mladek
2024-08-21 14:20       ` Sebastian Andrzej Siewior

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