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From: Andrew Morton <akpm@linux-foundation.org>
To: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: linux-kernel@vger.kernel.org, Jiri Kosina <jkosina@suse.cz>,
	Ulrich Obergfell <uobergfe@redhat.com>,
	Aaron Tomlin <atomlin@redhat.com>
Subject: Re: [PATCH] kernel/watchdog: use nmi registers snapshot in hardlockup handler
Date: Fri, 8 Jul 2016 14:02:45 -0700
Message-ID: <20160708140245.6721f848bae1b8700a3e17fe@linux-foundation.org> (raw)
In-Reply-To: <146771764784.86724.6006627197118544150.stgit@buzz>

On Tue, 05 Jul 2016 14:20:47 +0300 Konstantin Khlebnikov <khlebnikov@yandex-team.ru> wrote:

> NMI handler doesn't call set_irq_regs(), so get_irq_regs() returns NULL or
> stale snapshot from beginning of IRQ interrupted by NMI. Registers from
> argument are always here and points to interrupted instruction and state.

Changelog is quite poor.  Please send along a new one which describes
in full detail how this patch alters kernel behaviour.

Such a description will help others decide whether their kernel might
need this patch and permits others to decide which kernel versions need
the fix.

      parent reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-05 11:20 Konstantin Khlebnikov
2016-07-07  8:30 ` Jiri Kosina
2016-07-08 21:02 ` Andrew Morton [this message]

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