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Modify x86 kernel command line to enable nmi watchog.

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For the kernel nmi to be activated and function properly it
must be enabled in the kernel command line. This CL adds
`nmi_watchdog=panic,lapic' (which is equivalent of
nmi_watchdog=2) to the command line. The reason '2' was used
and not '1' is that nmi_watchdog=1 is known to break audio
functionality on chromeos devices.

Note that only x86 platforms are affected by this change,
ARM platforms will be added later.

This CL is required by the autotest CL

http://codereview.chromium.org/6596002

Change-Id: Ie8a9ba3f0de6d236cbe098e402b0240aa64ddcd0

BUG=chromium-os:12463, chromium-os:12464
TEST=see below

. build new image for test and install it on the target
. restart the target
. observe the contents of /proc/sys/kernel/nmi_watchdog (it
  should read '1' after reboot)
. run autotest as follows
 (chroot) ~/trunk/src/scripts $ ./run_remote_tests.sh \
   --board=x86-mario --remote=172.22.75.163 \
   platform_KernelErrorPaths kernel_BootMessagesServer \
platform_HighResTimers
. observe the results:

INFO   : Test results:
---------------------------------------------------------
kernel_BootMessagesServer                           PASS
kernel_BootMessagesServer/kernel_BootMessagesServer PASS
  coldboot_active_mb                                50
  coldboot_anonpages_mb                             36
  coldboot_buffers_mb                               3
  coldboot_cached_mb                                166
  coldboot_inactive_mb                              156
  coldboot_memfree_mb                               1649
platform_HighResTimers                              PASS
platform_HighResTimers/platform_HighResTimers       PASS
platform_KernelErrorPaths                           PASS
platform_KernelErrorPaths/platform_KernelErrorPaths PASS
---------------------------------------------------------
Total PASS: 6/6 (100%)

No crashes detected during testing.
Elapsed time: 4m28s

Review URL: http://codereview.chromium.org/6597001
This commit is contained in:
Vadim Bendebury 2011-02-28 10:28:31 -08:00
parent 2e671be911
commit 8e623f6ea5
1 changed files with 1 additions and 0 deletions
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1
build_kernel_image.sh
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@ -167,6 +167,7 @@ cros_secure
kern_guid=%U
tpm_tis.force=1
tpm_tis.interrupts=0
nmi_watchdog=panic,lapic
EOF
WORK="${WORK} ${FLAGS_working_dir}/config.txt"