linux-kernel - Re: [RFC][PATCH 0/4] printk: introduce printing kernel thread

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Message-ID: <20170322175920.bcltzwega6dts2n4@hirez.programming.kicks-ass.net>
Date:   Wed, 22 Mar 2017 18:59:20 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Petr Mladek <pmladek@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [RFC][PATCH 0/4] printk: introduce printing kernel thread

On Mon, Mar 06, 2017 at 09:45:50PM +0900, Sergey Senozhatsky wrote:
>  sysrq is potentially even trickier. can we always wake_up() kernel
>  thread from sysrq? there probably might be cases when we can't rely
>  on the scheduler.

sysrq runs from interrupt context, right? Should be able to do wakeups.