diff options
author | Frederic Weisbecker <fweisbec@gmail.com> | 2010-05-15 16:30:22 -0400 |
---|---|---|
committer | Frederic Weisbecker <fweisbec@gmail.com> | 2010-05-15 19:57:27 -0400 |
commit | e16bb1d7fe07609bc8b0e4c043eff2f47ada78d8 (patch) | |
tree | 601b142677b67155f23f1413bd651c552ad54fa5 /lib/Kconfig.debug | |
parent | 5e85391b3badd3f0e50ebdd0cafe0202a979f73a (diff) |
lockup_detector: Update some config
We kept CONFIG_DETECT_SOFTLOCKUP around for compatibility with
older configs. But it was enabled by default if CONFIG_DEBUG_KERNEL.
So if we want to enable CONFIG_LOCKUP_DETECTOR on configs that had
CONFIG_DETECT_SOFTLOCKUP, all we need is to have the same enabling
by default if CONFIG_DEBUG_KERNEL. We can then remove
CONFIG_DETECT_SOFTLOCKUP directly.
So tag CONFIG_LOCKUP_DETECTOR as default y. This is what we want for
most serious kernel debugging anyway.
And also forbid the lockup detector in S390 as it was for the
previous softlockup detector, event though the true reason for that
is not outlined.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Diffstat (limited to 'lib/Kconfig.debug')
-rw-r--r-- | lib/Kconfig.debug | 25 |
1 files changed, 3 insertions, 22 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 755713a359e2..3a18b0b856ce 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug | |||
@@ -152,29 +152,10 @@ config DEBUG_SHIRQ | |||
152 | Drivers ought to be able to handle interrupts coming in at those | 152 | Drivers ought to be able to handle interrupts coming in at those |
153 | points; some don't and need to be caught. | 153 | points; some don't and need to be caught. |
154 | 154 | ||
155 | config DETECT_SOFTLOCKUP | ||
156 | bool | ||
157 | depends on DEBUG_KERNEL && !S390 | ||
158 | default y | ||
159 | help | ||
160 | Say Y here to enable the kernel to detect "soft lockups", | ||
161 | which are bugs that cause the kernel to loop in kernel | ||
162 | mode for more than 60 seconds, without giving other tasks a | ||
163 | chance to run. | ||
164 | |||
165 | When a soft-lockup is detected, the kernel will print the | ||
166 | current stack trace (which you should report), but the | ||
167 | system will stay locked up. This feature has negligible | ||
168 | overhead. | ||
169 | |||
170 | (Note that "hard lockups" are separate type of bugs that | ||
171 | can be detected via the NMI-watchdog, on platforms that | ||
172 | support it.) | ||
173 | |||
174 | config LOCKUP_DETECTOR | 155 | config LOCKUP_DETECTOR |
175 | bool "Detect Hard and Soft Lockups" | 156 | bool "Detect Hard and Soft Lockups" |
176 | depends on DEBUG_KERNEL | 157 | depends on DEBUG_KERNEL && !S390 |
177 | default DETECT_SOFTLOCKUP | 158 | default y |
178 | help | 159 | help |
179 | Say Y here to enable the kernel to act as a watchdog to detect | 160 | Say Y here to enable the kernel to act as a watchdog to detect |
180 | hard and soft lockups. | 161 | hard and soft lockups. |
@@ -212,7 +193,7 @@ config BOOTPARAM_SOFTLOCKUP_PANIC | |||
212 | 193 | ||
213 | config BOOTPARAM_SOFTLOCKUP_PANIC_VALUE | 194 | config BOOTPARAM_SOFTLOCKUP_PANIC_VALUE |
214 | int | 195 | int |
215 | depends on DETECT_SOFTLOCKUP | 196 | depends on LOCKUP_DETECTOR |
216 | range 0 1 | 197 | range 0 1 |
217 | default 0 if !BOOTPARAM_SOFTLOCKUP_PANIC | 198 | default 0 if !BOOTPARAM_SOFTLOCKUP_PANIC |
218 | default 1 if BOOTPARAM_SOFTLOCKUP_PANIC | 199 | default 1 if BOOTPARAM_SOFTLOCKUP_PANIC |