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LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
PostgreSQL 9.3 beta: Federated databases and more
LWN.net Weekly Edition for May 9, 2013
(Nearly) full tickless operation in 3.10
A couple of articles about the summit
(such as this one http://news.yahoo.com/s/cmp/20080410/tc_cmp/207100528)
mention a patch from Nortel for restarting a crashed system.
Do anyone have any links to more info about this?
Posted Apr 17, 2008 7:30 UTC (Thu) by mingo (subscriber, #31122)
the observation is correct - automatic reboot upon lockups is not possible in Linux yet.
The soft-lockup detector looks like the logical place to put this feature. I have whipped up a
patch for this and have queued it up for v2.6.26:
it adds softlockup_panic=1 boot option, a /proc/sys/kernel/softlockup_panic sysctl, and a
CONFIG_SOFTLOCKUP_PANIC=y .config option - whichever is the most convenient to use.
this feature should be used in conjunction with panic_timeout=2, so that every panic reboots
the box after two seconds. Probably /proc/sys/kernel/softlockup_thresh should be decreased as
well to 10 seconds (down from the default 60 seconds) - so the combined reboot delay should be
(Note: the feature will be default-available on all default kernel builds, but the sysctl will
default to off. I.e. the config option influences the value of the default, not the
availability of the feature.)
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