linux-kernel - Re: [RFC PATCH v4 0/9] printk: new ringbuffer implementation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190906195359.GB69785@tigerII.localdomain>
Date:   Sat, 7 Sep 2019 04:53:59 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Petr Mladek <pmladek@...e.com>,
        Andrea Parri <andrea.parri@...rulasolutions.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        John Ogness <john.ogness@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v4 0/9] printk: new ringbuffer implementation

On (09/06/19 16:01), Peter Zijlstra wrote:
> > 2. The simple approach works only with lockless consoles. We need
> >    something else for the rest at least for NMI. Simle offloading
> >    to a kthread has been blocked for years. People wanted the
> >    trylock-and-flush-immediately approach.
> 
> Have an irq_work to wake up a kthread that will print to shit consoles.

Do we need sched dependency? We can print a batch of pending
logbuf messages and queue another irw_work if there are more
pending messages, right?

	-ss