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Message-ID: <471700F4.1080200@ah.jp.nec.com>
Date: Thu, 18 Oct 2007 15:45:08 +0900
From: Takenori Nagano <t-nagano@...jp.nec.com>
To: linux-kernel@...r.kernel.org
CC: vgoyal@...ibm.com, "Eric W. Biederman" <ebiederm@...ssion.com>,
k-miyoshi@...jp.nec.com, kexec@...ts.infradead.org,
Bernhard Walle <bwalle@...e.de>, Keith Owens <kaos@....com.au>,
Andrew Morton <akpm@...ux-foundation.org>, kdb@....sgi.com
Subject: [PATCH 0/2] add new notifier function ,take2
Hi,
A big thanks to everybody who read and replied to first version. I have tried to
incorporate reviewer's comments and suggestions.
changelog take1 -> take2
- Rebased 2.6.23
- comment updated
- renamed the notifiner name "tunable_notifier" to "tunable_atomic_notifier"
- fixed typo
These patches add new notifier function and implement it to panic_notifier_list.
We used the hardcoded notifier chain so far, but it was not flexible. New
notifier is very flexible, because user can change a list of order by debugfs.
Thanks,
Example)
# cd /sys/kernel/debug/
# ls
kprobes pktcdvd
# insmod ipmi_msghandler.ko
# ls
kprobes panic_notifier_list pktcdvd
# cd panic_notifier_list/
# ls
ipmi_msghandler
# insmod ipmi_watchdog.ko
# ls
ipmi_msghandler ipmi_wdog
# cat ipmi_msghandler/priority
200
# cat ipmi_wdog/priority
150
#
Kernel panic - not syncing: panic
ipmi_msghandler : notifier calls panic_event().
ipmi_watchdog : notifier calls wdog_panic_handler().
.....(reboot)
# cat ipmi_msghandler/priority
200
# cat ipmi_wdog/priority
150
# echo 300 > ipmi_wdog/priority
#
Kernel panic - not syncing: panic
ipmi_watchdog : notifier calls wdog_panic_handler().
ipmi_msghandler : notifier calls panic_event().
--
Takenori Nagano <t-nagano@...jp.nec.com>
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