linux-kernel - Re: [PATCH v5 0/4] printk: replace ringbuffer

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Date:   Fri, 10 Jul 2020 10:28:33 +0200
From:   Petr Mladek <pmladek@...e.com>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrea Parri <parri.andrea@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paul McKenney <paulmck@...nel.org>, kexec@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 0/4] printk: replace ringbuffer

On Thu 2020-07-09 15:29:40, John Ogness wrote:
> Hello,
> 
> Here is a v5 for the first series to rework the printk
> subsystem. The v4 is here [0]. This first series
> only replaces the existing ringbuffer implementation. No locking
> is removed. The semantics/behavior of printk are kept the same
> except for a minor optimization that is reverted (patch 3).
> 
> John Ogness (4):
>   crash: add VMCOREINFO macro to define offset in a struct declared by
>     typedef
>   printk: add lockless ringbuffer
>   Revert "printk: lock/unlock console only for new logbuf entries"
>   printk: use the lockless ringbuffer

The patchset is committed in printk/linux.git, branch printk-rework.

I did not add any target kernel version into the topic branch name.
We could use it for the entire rework. The pieces would go into
mainline when we and linux-next are happy.

Best Regards,
Petr