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| author | Jason Baron <jbaron@akamai.com> | 2013-11-25 23:23:04 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-11-26 12:12:26 +0100 |
| commit | 5800dc3cff87c3a1548382298bb16e1fb4ec7e32 (patch) | |
| tree | 7495d7a91bbac6ab956cb0099ae023deb3a4db76 /include/linux/kernel.h | |
| parent | b975dc3689fc6a3718ad288ce080924f9cb7e176 (diff) | |
| download | lwn-5800dc3cff87c3a1548382298bb16e1fb4ec7e32.tar.gz lwn-5800dc3cff87c3a1548382298bb16e1fb4ec7e32.zip | |
panic: Make panic_timeout configurable
The panic_timeout value can be set via the command line option
'panic=x', or via /proc/sys/kernel/panic, however that is not
sufficient when the panic occurs before we are able to set up
these values. Thus, add a CONFIG_PANIC_TIMEOUT so that we can
set the desired value from the .config.
The default panic_timeout value continues to be 0 - wait
forever. Also adds set_arch_panic_timeout(new_timeout,
arch_default_timeout), which is intended to be used by arches in
arch_setup(). The idea being that the new_timeout is only set if
the user hasn't changed from the arch_default_timeout.
Signed-off-by: Jason Baron <jbaron@akamai.com>
Cc: benh@kernel.crashing.org
Cc: paulus@samba.org
Cc: ralf@linux-mips.org
Cc: mpe@ellerman.id.au
Cc: felipe.contreras@gmail.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1a1674daec27c534df409697025ac568ebcee91e.1385418410.git.jbaron@akamai.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index d4e98d13eff4..2ac02772a86e 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -393,6 +393,15 @@ extern int panic_on_oops; extern int panic_on_unrecovered_nmi; extern int panic_on_io_nmi; extern int sysctl_panic_on_stackoverflow; +/* + * Only to be used by arch init code. If the user over-wrote the default + * CONFIG_PANIC_TIMEOUT, honor it. + */ +static inline void set_arch_panic_timeout(int timeout, int arch_default_timeout) +{ + if (panic_timeout == arch_default_timeout) + panic_timeout = timeout; +} extern const char *print_tainted(void); enum lockdep_ok { LOCKDEP_STILL_OK, |