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| author | Kurt Garloff <garloff@suse.de> | 2009-06-24 14:32:11 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-25 22:06:11 +0200 |
| commit | 5211a242d0cbdded372aee59da18f80552b0a80a (patch) | |
| tree | 5d2a853e538b8478648a57efe94ef049e76e13e6 /include/linux/kernel.h | |
| parent | 9c26f52b900f7207135bafc8789e1a4f5d43e096 (diff) | |
| download | blackbird-op-linux-5211a242d0cbdded372aee59da18f80552b0a80a.tar.gz blackbird-op-linux-5211a242d0cbdded372aee59da18f80552b0a80a.zip | |
x86: Add sysctl to allow panic on IOCK NMI error
This patch introduces a new sysctl:
/proc/sys/kernel/panic_on_io_nmi
which defaults to 0 (off).
When enabled, the kernel panics when the kernel receives an NMI
caused by an IO error.
The IO error triggered NMI indicates a serious system
condition, which could result in IO data corruption. Rather
than contiuing, panicing and dumping might be a better choice,
so one can figure out what's causing the IO error.
This could be especially important to companies running IO
intensive applications where corruption must be avoided, e.g. a
bank's databases.
[ SuSE has been shipping it for a while, it was done at the
request of a large database vendor, for their users. ]
Signed-off-by: Kurt Garloff <garloff@suse.de>
Signed-off-by: Roberto Angelino <robertangelino@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
LKML-Reference: <20090624213211.GA11291@kroah.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index fac104e7186a..d6320a3e8def 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -303,6 +303,7 @@ extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in extern int panic_timeout; extern int panic_on_oops; extern int panic_on_unrecovered_nmi; +extern int panic_on_io_nmi; extern const char *print_tainted(void); extern void add_taint(unsigned flag); extern int test_taint(unsigned flag); |
