From de933bd833be1a53bd361c9a327afd3c65413351 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Fri, 18 Feb 2011 21:47:20 +0100 Subject: kbuild: reenable section mismatch analysis MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This was disabled in commit e5f95c8 (kbuild: print only total number of section mismatces found) because there were too many warnings. Now we're down to a reasonable number again, so we start scaring people with the details. Signed-off-by: Uwe Kleine-König Acked-by: Randy Dunlap Acked-by: Mike Frysinger Signed-off-by: Michal Marek --- lib/Kconfig.debug | 4 ---- 1 file changed, 4 deletions(-) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 2d05adb98401..8b6a4f13946f 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -102,11 +102,7 @@ config HEADERS_CHECK config DEBUG_SECTION_MISMATCH bool "Enable full Section mismatch analysis" - depends on UNDEFINED || (BLACKFIN) default y - # This option is on purpose disabled for now. - # It will be enabled when we are down to a reasonable number - # of section mismatch warnings (< 10 for an allyesconfig build) help The section mismatch analysis checks if there are illegal references from one section to another section. -- cgit v1.2.2 From f2c23f65f63fe0dd83fc94efdfae0364c74458b8 Mon Sep 17 00:00:00 2001 From: Michal Marek Date: Mon, 21 Mar 2011 10:44:30 +0100 Subject: kbuild: Make DEBUG_SECTION_MISMATCH selectable, but not on by default CONFIG_DEBUG_SECTION_MISMATCH has also runtime effects due to the -fno-inline-functions-called-once compiler flag, so forcing it on everyone is not a good idea. Signed-off-by: Michal Marek --- lib/Kconfig.debug | 1 - 1 file changed, 1 deletion(-) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 8b6a4f13946f..5a24805d4321 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -102,7 +102,6 @@ config HEADERS_CHECK config DEBUG_SECTION_MISMATCH bool "Enable full Section mismatch analysis" - default y help The section mismatch analysis checks if there are illegal references from one section to another section. -- cgit v1.2.2 From fef2c9bc1b54c0261324a96e948c0b849796e896 Mon Sep 17 00:00:00 2001 From: Don Zickus Date: Tue, 22 Mar 2011 16:34:16 -0700 Subject: kernel/watchdog.c: allow hardlockup to panic by default When a cpu is considered stuck, instead of limping along and just printing a warning, it is sometimes preferred to just panic, let kdump capture the vmcore and reboot. This gets the machine back into a stable state quickly while saving the info that got it into a stuck state to begin with. Add a Kconfig option to allow users to set the hardlockup to panic by default. Also add in a 'nmi_watchdog=nopanic' to override this. [akpm@linux-foundation.org: fix strncmp length] Signed-off-by: Don Zickus Acked-by: Peter Zijlstra Reviewed-by: WANG Cong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- lib/Kconfig.debug | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 191c5c4c89fc..fb0afeff9436 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -171,6 +171,23 @@ config HARDLOCKUP_DETECTOR def_bool LOCKUP_DETECTOR && PERF_EVENTS && HAVE_PERF_EVENTS_NMI && \ !ARCH_HAS_NMI_WATCHDOG +config BOOTPARAM_HARDLOCKUP_PANIC + bool "Panic (Reboot) On Hard Lockups" + depends on LOCKUP_DETECTOR + help + Say Y here to enable the kernel to panic on "hard lockups", + which are bugs that cause the kernel to loop in kernel + mode with interrupts disabled for more than 60 seconds. + + Say N if unsure. + +config BOOTPARAM_HARDLOCKUP_PANIC_VALUE + int + depends on LOCKUP_DETECTOR + range 0 1 + default 0 if !BOOTPARAM_HARDLOCKUP_PANIC + default 1 if BOOTPARAM_HARDLOCKUP_PANIC + config BOOTPARAM_SOFTLOCKUP_PANIC bool "Panic (Reboot) On Soft Lockups" depends on LOCKUP_DETECTOR -- cgit v1.2.2 From 5af5bcb8d37f99ba415a1adc6da71051b84f93a5 Mon Sep 17 00:00:00 2001 From: Mandeep Singh Baines Date: Tue, 22 Mar 2011 16:34:23 -0700 Subject: printk: allow setting DEFAULT_MESSAGE_LEVEL via Kconfig We've been burned by regressions/bugs which we later realized could have been triaged quicker if only we'd paid closer attention to dmesg. To make it easier to audit dmesg, we'd like to make DEFAULT_MESSAGE_LEVEL Kconfig-settable. That way we can set it to KERN_NOTICE and audit any messages <= KERN_WARNING. Signed-off-by: Mandeep Singh Baines Cc: Ingo Molnar Cc: Joe Perches Cc: Olof Johansson Cc: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- lib/Kconfig.debug | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index fb0afeff9436..bef5faab660f 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -9,6 +9,17 @@ config PRINTK_TIME operations. This is useful for identifying long delays in kernel startup. +config DEFAULT_MESSAGE_LOGLEVEL + int "Default message log level (1-7)" + range 1 7 + default "4" + help + Default log level for printk statements with no specified priority. + + This was hard-coded to KERN_WARNING since at least 2.6.10 but folks + that are auditing their logs closely may want to set it to a lower + priority. + config ENABLE_WARN_DEPRECATED bool "Enable __deprecated logic" default y -- cgit v1.2.2 From 33ee3b2e2eb9b4b6c64dcf9ed66e2ac3124e748c Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Tue, 22 Mar 2011 16:34:40 -0700 Subject: kstrto*: converting strings to integers done (hopefully) right 1. simple_strto*() do not contain overflow checks and crufty, libc way to indicate failure. 2. strict_strto*() also do not have overflow checks but the name and comments pretend they do. 3. Both families have only "long long" and "long" variants, but users want strtou8() 4. Both "simple" and "strict" prefixes are wrong: Simple doesn't exactly say what's so simple, strict should not exist because conversion should be strict by default. The solution is to use "k" prefix and add convertors for more types. Enter kstrtoull() kstrtoll() kstrtoul() kstrtol() kstrtouint() kstrtoint() kstrtou64() kstrtos64() kstrtou32() kstrtos32() kstrtou16() kstrtos16() kstrtou8() kstrtos8() Include runtime testsuite (somewhat incomplete) as well. strict_strto*() become deprecated, stubbed to kstrto*() and eventually will be removed altogether. Use kstrto*() in code today! Note: on some archs _kstrtoul() and _kstrtol() are left in tree, even if they'll be unused at runtime. This is temporarily solution, because I don't want to hardcode list of archs where these functions aren't needed. Current solution with sizeof() and __alignof__ at least always works. Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- lib/Kconfig.debug | 3 +++ 1 file changed, 3 insertions(+) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index bef5faab660f..df9234c5f9d1 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1250,3 +1250,6 @@ source "samples/Kconfig" source "lib/Kconfig.kgdb" source "lib/Kconfig.kmemcheck" + +config TEST_KSTRTOX + tristate "Test kstrto*() family of functions at runtime" -- cgit v1.2.2 From 9718269a7f5f6f3d723dd34e05269579a3ccfc1e Mon Sep 17 00:00:00 2001 From: Daniel Baluta Date: Mon, 4 Apr 2011 15:06:44 -0700 Subject: kemleak-test: build as module only mm/kmemleak-test.c is used to provide an example of how kmemleak tool works. Memory is leaked at module unload-time, so building the test in kernel (Y) makes the leaks impossible and the test useless. Qualify DEBUG_KMEMLEAK_TEST config symbol with "depends on m", to restrict module-only building. Signed-off-by: Daniel Baluta Acked-by: Pekka Enberg Acked-by: Catalin Marinas Signed-off-by: Randy Dunlap Signed-off-by: Linus Torvalds --- lib/Kconfig.debug | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'lib/Kconfig.debug') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index df9234c5f9d1..c768bcdda1b7 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -434,11 +434,9 @@ config DEBUG_KMEMLEAK_EARLY_LOG_SIZE config DEBUG_KMEMLEAK_TEST tristate "Simple test for the kernel memory leak detector" - depends on DEBUG_KMEMLEAK + depends on DEBUG_KMEMLEAK && m help - Say Y or M here to build a test for the kernel memory leak - detector. This option enables a module that explicitly leaks - memory. + This option enables a module that explicitly leaks memory. If unsure, say N. -- cgit v1.2.2