linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Peter Zijlstra <peterz@infradead.org>
To: pmladek@suse.com, sergey.senozhatsky@gmail.com
Cc: linux-kernel@vger.kernel.org, rostedt@goodmis.org,
	mingo@kernel.org, tglx@linutronix.de, peterz@infradead.org
Subject: [PATCH 0/3] printk: Add force_early_printk boot param
Date: Thu, 28 Sep 2017 14:18:23 +0200	[thread overview]
Message-ID: <20170928121823.430053219@infradead.org> (raw)

Most all printk() bits are terminally broken because they rely on the scheduler
and blocking locks to function, making them unsuitable for debugging the
scheduler and NMI context things.

Luckily many early_printk implementations are relatively sane and don't rely on
anything much at all; the x86 early_serial_console for example is pure
bit-banging without anything.

So provide means to always use these and avoid the whole printk mess.

             reply	other threads:[~2017-09-28 12:26 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-28 12:18 Peter Zijlstra [this message]
2017-09-28 12:18 ` [PATCH 1/3] printk: Fix kdb_trap_printk placement Peter Zijlstra
2017-10-03 22:10   ` Steven Rostedt
2017-10-05 13:38   ` Petr Mladek
2017-10-05 13:42     ` Peter Zijlstra
2017-10-09 15:05       ` Petr Mladek
2017-10-12  9:45   ` Petr Mladek
2017-10-12 10:03     ` Petr Mladek
2017-10-12 11:34       ` Peter Zijlstra
2017-10-12 11:52         ` Greg Kroah-Hartman
2017-10-12 12:08           ` Greg Kroah-Hartman
2017-10-12 18:11             ` Joe Perches
2017-10-13 14:23               ` Petr Mladek
2017-10-12 11:30     ` Peter Zijlstra
2017-09-28 12:18 ` [PATCH 2/3] early_printk: Add force_early_printk kernel parameter Peter Zijlstra
2017-09-28 15:41   ` Randy Dunlap
2017-09-28 16:07     ` Peter Zijlstra
2017-09-28 17:05       ` Randy Dunlap
2017-10-03 22:18   ` Steven Rostedt
2017-10-12 10:24   ` Petr Mladek
2017-10-12 11:39     ` Peter Zijlstra
2017-10-13 13:06       ` Petr Mladek
2017-10-13 13:20         ` Peter Zijlstra
2017-10-13 13:30         ` Steven Rostedt
2017-09-28 12:18 ` [PATCH 3/3] early_printk: Add simple serialization to early_vprintk() Peter Zijlstra
2017-10-03 22:24   ` Steven Rostedt
2017-10-04  9:08     ` Peter Zijlstra
2017-10-04 13:04       ` Steven Rostedt
2017-10-04 13:08         ` Peter Zijlstra
2017-10-04 14:17         ` Paul E. McKenney
2017-10-04 14:43           ` Steven Rostedt
2017-10-04 14:52             ` Peter Zijlstra
2017-10-04 15:02               ` Steven Rostedt
2017-10-04 15:14               ` Paul E. McKenney
2017-10-04 15:24           ` Peter Zijlstra
2017-10-04 15:38             ` Paul E. McKenney
2017-09-28 16:02 ` [PATCH 0/3] printk: Add force_early_printk boot param Sergey Senozhatsky
2017-09-28 16:17   ` Peter Zijlstra

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170928121823.430053219@infradead.org \
    --to=peterz@infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=pmladek@suse.com \
    --cc=rostedt@goodmis.org \
    --cc=sergey.senozhatsky@gmail.com \
    --cc=tglx@linutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).