Matthew Garrett c22ab33290 kmsg_dump: don't run on non-error paths by default ... Since commit 04c6862c05 ("kmsg_dump: add kmsg_dump() calls to the reboot, halt, poweroff and emergency_restart paths"), kmsg_dump() gets run on normal paths including poweroff and reboot. This is less than ideal given pstore implementations that can only represent single backtraces, since a reboot may overwrite a stored oops before it's been picked up by userspace. In addition, some pstore backends may have low performance and provide a significant delay in reboot as a result. This patch adds a printk.always_kmsg_dump kernel parameter (which can also be changed from userspace). Without it, the code will only be run on failure paths rather than on normal paths. The option can be enabled in environments where there's a desire to attempt to audit whether or not a reboot was cleanly requested or not. Signed-off-by: Matthew Garrett <mjg@redhat.com> Acked-by: Seiji Aguchi <seiji.aguchi@hds.com> Cc: Seiji Aguchi <seiji.aguchi@hds.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Marco Stornelli <marco.stornelli@gmail.com> Cc: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Don Zickus <dzickus@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-03-05 15:49:42 -08:00
..
ABI	Autogenerated GPG tag for Rusty D1ADB8F1: 15EE 8D6C AB0E 7F0C F999 BFCB D920 0E6C D1AD B8F1	2012-01-14 12:32:16 -08:00
accounting	Documentation: update cgroupfs mount point	2011-06-15 21:52:50 -07:00
acpi	acpi/apei/einj: Add extensions to EINJ from rev 5.0 of acpi spec	2012-01-18 01:14:17 -05:00
aoe	Documentation: update broken web addresses.	2010-08-04 15:21:40 +02:00
arm	ARM: move iotable mappings within the vmalloc region	2011-11-26 19:21:26 -05:00
auxdisplay
blackfin	doc: fix broken references	2011-09-27 18:08:04 +02:00
block	Documentation: drop as block elevator reference in switching-sched.txt	2011-11-04 12:01:48 -07:00
blockdev	cciss: auto engage SCSI mid layer at driver load time	2011-11-16 09:21:49 +01:00
cdrom	doc: fix broken references	2011-09-27 18:08:04 +02:00
cgroups	memcg: fix pgpgin/pgpgout documentation	2012-01-12 20:13:06 -08:00
connector
console
cpu-freq	Doc: cpufreq: Fix typo and outdated line	2011-11-08 10:23:29 +01:00
cpuidle
cris
crypto
development-process	Documentation: Update stable address	2011-12-12 14:14:31 -08:00
device-mapper	dm log userspace: fix comment hyphens	2011-10-31 20:21:22 +00:00
devicetree	Merge branch 'for-linus/i2c-33' of git://git.fluff.org/bjdooks/linux	2012-01-18 13:46:13 -08:00
DocBook	docbook: fix fatal errors in device-drivers docbook and add DMA Management section	2012-02-01 17:28:26 -08:00
driver-model	Documentation: devres: add allocation functions to list of supported calls	2012-01-24 10:47:42 -08:00
dvb	[media] dvb_get_firmware: updates for it913x	2011-12-11 09:00:48 -02:00
early-userspace
fault-injection	fault-injection: update documentation with the mmc module param	2011-10-26 16:32:13 -04:00
fb	fbdev: Add FOURCC-based format configuration API	2011-12-19 20:07:13 +00:00
filesystems	Merge branch 'for-3.3' of git://linux-nfs.org/~bfields/linux	2012-01-14 12:26:41 -08:00
firmware_class	firmware: Update hotplug script	2010-08-05 13:53:34 -07:00
frv	doc: fix broken references	2011-09-27 18:08:04 +02:00
hid	HID: Move hiddev.txt to the new Documentation/hid directory	2011-03-22 11:43:51 +01:00
hwmon	hwmon: (sysfs-interface) Update tempX_type attribute to be more generic	2012-01-16 22:51:48 +01:00
i2c	i2c: Fix device name for 10-bit slave address	2011-11-23 11:33:07 +01:00
i2o	doc: i2o: fix typo 'Settting'	2011-06-07 16:06:01 +02:00
ia64	Fix common misspellings	2011-03-31 11:26:23 -03:00
ide
infiniband	Documentation: update broken web addresses.	2010-08-04 15:21:40 +02:00
input	Input: document device properties	2012-02-01 09:14:17 -08:00
ioctl	NVMe: New driver	2011-11-04 15:52:51 -04:00
isdn	doc: fix wrong arch/i386 references	2011-06-13 13:43:05 +02:00
ja_JP	Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6	2011-07-25 23:06:24 -07:00
kbuild	kbuild: Add support for an "archheaders" target	2011-11-17 13:35:20 -08:00
kdump	[S390] Add s390x description to Documentation/kdump/kdump.txt	2011-12-27 11:27:13 +01:00
ko_KR	Docs/Kconfig: Update: osdl.org -> linuxfoundation.org	2010-11-15 23:50:13 +01:00
laptops	Documentation: thinkpad-acpi grammo fixes	2011-11-04 12:01:47 -07:00
leds	Documentation: fix leds-class.txt duplicated word	2011-11-04 12:01:48 -07:00
m68k	Documentation: add pointer to name_to_dev_t for root= values	2011-08-03 14:25:21 -10:00
make	kbuild: introduce HDR_ARCH_LIST for headers_install_all	2010-12-14 22:16:19 +01:00
mips	Fix common misspellings	2011-03-31 11:26:23 -03:00
misc-devices	Fix common misspellings	2011-03-31 11:26:23 -03:00
mmc	mmc: core: Fixup delayed work clock gating patch	2012-01-11 23:58:43 -05:00
mn10300
mtd	Documentation: update broken web addresses.	2010-08-04 15:21:40 +02:00
namespaces
netlabel
networking	bonding: document undocumented active_slave sysfs entry.	2011-12-26 20:09:35 -05:00
nfc	NFC: Driver for NXP Semiconductors PN544 NFC chip.	2011-01-13 08:03:19 -08:00
parisc
PCI	doc: fix broken references	2011-09-27 18:08:04 +02:00
pcmcia	pcmcia: use autoconfiguration feature for ioports and iomem	2010-09-29 17:20:24 +02:00
power	PM / Documentation: Fix minor issue in freezing_of_tasks.txt	2012-01-19 23:22:49 +01:00
powerpc	Fix common misspellings	2011-03-31 11:26:23 -03:00
pps	pps: add parallel port PPS signal generator	2011-01-13 08:03:21 -08:00
prctl
pti	Kernel documentation for the PTI feature.	2011-05-13 16:31:00 -07:00
ptp	ptp: Added a brand new class driver for ptp clocks.	2011-05-23 13:01:00 -07:00
rapidio	RapidIO: documentation update	2011-11-02 16:07:02 -07:00
RCU	docs: Additional LWN links to RCU API	2011-12-11 10:32:23 -08:00
s390	[S390] Remove Kerntypes leftovers	2011-12-27 11:27:12 +01:00
scheduler	sched: Add documentation for bandwidth control	2011-08-14 12:03:58 +02:00
scsi	[SCSI] qla4xxx: Update license	2012-01-16 12:34:12 +04:00
security	Merge branch 'master'; commit 'v3.2-rc2' into next	2011-11-16 12:39:48 +11:00
serial	serial/documentation: fix documented name of DCD cpp symbol	2012-01-04 16:26:32 -08:00
sh	sh: clkfwk: Kill off unused clk_set_rate_ex().	2010-11-15 18:25:12 +09:00
sound	Merge branch 'topic/hda' into for-linus	2012-01-12 09:59:18 +01:00
sparc
spi	doc: fix broken references	2011-09-27 18:08:04 +02:00
sysctl	Documentation: add missing tainted bits to Documentation/sysctl/kernel.txt	2012-02-06 16:29:19 -08:00
target	target: tcm_mod_builder: small fixups	2011-12-14 11:38:25 +00:00
telephony	Fix common misspellings	2011-03-31 11:26:23 -03:00
thermal	thermal: Rename generate_netlink_event	2012-01-23 03:15:25 -05:00
timers	doc: fix broken references	2011-09-27 18:08:04 +02:00
trace	mm-tracepoint: fix documentation and examples	2012-01-10 16:30:41 -08:00
usb	USB: update documentation for usbmon	2012-01-04 16:04:30 -08:00
vDSO	Document the vDSO and add a reference parser	2011-07-14 17:57:09 -07:00
video4linux	[media] V4L2 Spec: fix extended control documentation	2012-01-16 09:37:53 -02:00
virtual	lguest: remove reference from Documentation/virtual/00-INDEX	2012-01-28 08:10:23 +10:30
vm	slub: document setting min order with debug_guardpage_minorder > 0	2012-01-12 20:13:04 -08:00
w1	Fix common misspellings	2011-03-31 11:26:23 -03:00
watchdog	watchdog: documentation: describe nowayout in coversion-guide	2012-01-06 15:26:14 +01:00
wimax
x86	x86-64, doc: Remove int 0xcc from entry_64.S documentation	2011-08-16 08:04:08 -07:00
zh_CN	remove the messy code file Documentation/zh_CN/SubmitChecklist	2011-09-26 16:18:41 -07:00
.gitignore
00-INDEX	Documentation: add Ramoops usage description	2011-08-13 18:34:03 -07:00
applying-patches.txt
atomic_ops.txt	doc: Add load/store guarantees to Documentation/atomic-ops.txt	2011-12-11 10:31:58 -08:00
bad_memory.txt
basic_profiling.txt
binfmt_misc.txt	Documentation: update broken web addresses.	2010-08-04 15:21:40 +02:00
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt	doc: fix broken references	2011-09-27 18:08:04 +02:00
cachetlb.txt	mm: convert mm->cpu_vm_cpumask into cpumask_var_t	2011-05-25 08:39:21 -07:00
Changes	Documentation/Changes: remove some really obsolete text	2011-07-11 16:48:38 -07:00
circular-buffers.txt
coccinelle.txt	coccinelle.txt: update documentation to include M= option	2012-01-14 22:25:56 +01:00
CodingStyle	Documentation: update CodingStyle use of braces	2011-11-04 12:01:47 -07:00
cpu-hotplug.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
cpu-load.txt
cputopology.txt	topology/sysfs: Provide book id and siblings attributes	2010-09-09 20:41:25 +02:00
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
devices.txt	vhost-net: add module alias (v2.1)	2012-01-13 10:12:23 -08:00
digsig.txt	crypto: digital signature verification support	2011-11-09 12:10:37 +02:00
DMA-API-HOWTO.txt	Documentation/DMA-API-HOWTO.txt: fix misleading example	2011-07-26 16:49:45 -07:00
DMA-API.txt	include/linux/dma-mapping.h: add dma_zalloc_coherent()	2011-11-02 16:07:02 -07:00
DMA-attributes.txt
dma-buf-sharing.txt	dma-buf: Documentation update for Kconfig select	2012-01-13 10:27:33 +00:00
DMA-ISA-LPC.txt
dmaengine.txt	DMAEngine: Define interleaved transfer request api	2011-11-18 12:16:24 +05:30
dontdiff	[S390] Remove Kerntypes leftovers	2011-12-27 11:27:12 +01:00
dynamic-debug-howto.txt	Merge branch 'docs-next' of git://git.lwn.net/linux-2.6	2011-03-27 19:46:59 -07:00
edac.txt	Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6	2011-04-07 11:14:49 -07:00
eisa.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
email-clients.txt	Documentation: email-clients: Add better Thunderbird information	2011-08-13 18:34:03 -07:00
feature-removal-schedule.txt	ARM: at91: removal of CAP9 SoC family	2012-01-20 15:08:38 +01:00
flexible-arrays.txt	flex_array: flex_array_prealloc takes a number of elements, not an end	2011-04-28 16:12:47 -04:00
futex-requeue-pi.txt
gcov.txt
gpio.txt	Revert "gpiolib: annotate gpio-intialization with __must_check"	2011-01-13 17:26:46 -08:00
highuid.txt
HOWTO	Documentation: Update stable address	2011-12-12 14:14:31 -08:00
hw_random.txt
hwspinlock.txt	hwspinlock/core: register a bank of hwspinlocks in a single API call	2011-09-21 19:45:34 +03:00
init.txt
initrd.txt
intel_txt.txt	Documentation: update broken web addresses.	2010-08-04 15:21:40 +02:00
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt	Documentation/iostats.txt: bit-size reference etc.	2011-03-23 20:44:18 +01:00
IPMI.txt	IPMI: Add the document description of ipmi_get_smi_info	2010-12-14 00:22:00 -05:00
IRQ-affinity.txt	bitmap, irq: add smp_affinity_list interface to /proc/irq	2011-05-25 08:39:45 -07:00
IRQ.txt
irqflags-tracing.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt	docbook: warn on unused doc entries	2010-09-11 16:49:21 -07:00
kernel-docs.txt	doc: fix broken references	2011-09-27 18:08:04 +02:00
kernel-parameters.txt	kmsg_dump: don't run on non-error paths by default	2012-03-05 15:49:42 -08:00
kmemcheck.txt
kmemleak.txt	kmemleak: Handle percpu memory allocation	2011-12-02 16:12:42 +00:00
kobject.txt
kprobes.txt	tree-wide: fix comment/printk typos	2010-11-01 15:38:34 -04:00
kref.txt	kref: Fix typo in kref documentation	2011-03-07 13:20:05 -08:00
ldm.txt	Documentation: update broken web addresses.	2010-08-04 15:21:40 +02:00
local_ops.txt
lockdep-design.txt	lockdep: Update documentation for lock-class leak detection	2011-12-11 10:31:23 -08:00
lockstat.txt	Documentation: Add statistics about nested locks	2011-05-28 17:03:29 +02:00
logo.gif
logo.txt
magic-number.txt	doc: fix wrong arch/i386 references	2011-06-13 13:43:05 +02:00
Makefile	[media] Remove the old V4L1 v4lgrab.c file	2010-12-29 08:17:12 -02:00
ManagementStyle
mca.txt	doc: fix wrong arch/i386 references	2011-06-13 13:43:05 +02:00
md.txt	md: create externally visible flags for supporting hot-replace.	2011-12-23 10:17:51 +11:00
media-framework.txt	doc: fix broken references	2011-09-27 18:08:04 +02:00
memory-barriers.txt	doc: fix broken references	2011-09-27 18:08:04 +02:00
memory-hotplug.txt	memory hotplug: Allow memory blocks to span multiple memory sections	2011-02-03 16:08:57 -08:00
memory.txt
mono.txt
mutex-design.txt	mutex: Fix annotations to include it in kernel-locking docbook	2010-09-03 08:19:51 +02:00
nmi_watchdog.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt	module,bug: Add TAINT_OOT_MODULE flag for modules not built in-tree	2011-11-07 07:54:42 +10:30
padata.txt	Documentation/padata.txt: fix typos etc.	2010-08-11 08:59:18 -07:00
parport-lowlevel.txt
parport.txt
pi-futex.txt
pinctrl.txt	pinctrl: fix some pinmux typos	2012-01-26 14:11:31 +01:00
pnp.txt
preempt-locking.txt
printk-formats.txt	Documentation: update printk-formats.txt	2011-06-15 21:52:50 -07:00
prio_tree.txt
ramoops.txt	Documentation: add Ramoops usage description	2011-08-13 18:34:03 -07:00
rbtree.txt	Documentation: Update augmented rbtree documentation	2011-07-24 10:03:05 -07:00
rfkill.txt	doc: fix broken references	2011-09-27 18:08:04 +02:00
robust-futex-ABI.txt
robust-futexes.txt
rt-mutex-design.txt	variable name fix to Documentation/rt-mutex-design.txt	2010-06-05 17:39:09 +02:00
rt-mutex.txt
rtc.txt	RTC: Fix up rtc.txt documentation to reflect changes to generic rtc layer	2011-03-09 11:25:10 -08:00
SAK.txt
SecurityBugs	Fix common misspellings	2011-03-31 11:26:23 -03:00
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
SM501.txt
sparse.txt	update email address	2010-07-19 10:56:54 +02:00
spinlocks.txt	Documentation/spinlocks.txt: Remove reference to sti()/cli()	2011-07-11 12:45:04 -07:00
stable_api_nonsense.txt	doc: stable_api_nonsense.txt: fix paragraph to make more sense.	2011-03-30 12:02:05 +02:00
stable_kernel_rules.txt	stable: update documentation to ask for kernel version	2012-01-24 10:50:22 -08:00
SubmitChecklist	Documentation/SubmitChecklist: add RCU debug config options	2011-07-25 20:57:17 -07:00
SubmittingDrivers	Documentation: SubmittingDrivers: fix Linus's git tree URL	2011-08-13 18:34:03 -07:00
SubmittingPatches	Documentation: fix spelling error in SubmittingPatches	2011-08-13 18:34:02 -07:00
svga.txt
sysfs-rules.txt
sysrq.txt	documentation: update sysrq.txt magic sysrq keys	2010-10-26 17:32:41 -07:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
VGA-softcursor.txt
vgaarbiter.txt	misc latin1 to utf8 conversions	2012-01-02 13:04:55 +01:00
video-output.txt
volatile-considered-harmful.txt
workqueue.txt	workqueue: Document debugging tricks	2011-03-31 13:40:42 +02:00
xz.txt	decompressors: add XZ decompressor module	2011-01-13 08:03:24 -08:00
zorro.txt