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authorIngo Molnar <mingo@elte.hu>2007-07-16 10:40:10 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 20:05:43 +0400
commit45807a1df9f51d28d0ff0c6bcf900c210411d7c9 (patch)
treedf70e9162ce50ada2393987ca2a5b5794dcbb644 /Documentation
parent99fc06df72fe1c9ad3ec274720dcb5658c40bfd2 (diff)
downloadlinux-45807a1df9f51d28d0ff0c6bcf900c210411d7c9.tar.xz
vdso: print fatal signals
Add the print-fatal-signals=1 boot option and the /proc/sys/kernel/print-fatal-signals runtime switch. This feature prints some minimal information about userspace segfaults to the kernel console. This is useful to find early bootup bugs where userspace debugging is very hard. Defaults to off. [akpm@linux-foundation.org: Don't add new sysctl numbers] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 182c6a39d5a2..ab38322111c4 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1383,6 +1383,12 @@ and is between 256 and 4096 characters. It is defined in the file
autoconfiguration.
Ranges are in pairs (memory base and size).
+ print-fatal-signals=
+ [KNL] debug: print fatal signals
+ print-fatal-signals=1: print segfault info to
+ the kernel console.
+ default: off.
+
profile= [KNL] Enable kernel profiling via /proc/profile
Format: [schedule,]<number>
Param: "schedule" - profile schedule points.