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| author | Aaron Tomlin <atomlin@redhat.com> | 2014-01-20 17:34:13 +0000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-01-25 12:13:33 +0100 |
| commit | 270750dbc18a71b23d660df110e433ff9616a2d4 (patch) | |
| tree | 9b0400fc3713bd02d31835e8d0315cfbd7ccd912 /include/linux/sched | |
| parent | 2397efb1bb17595b35f31abb40d95074ebc04f1b (diff) | |
| download | blackbird-obmc-linux-270750dbc18a71b23d660df110e433ff9616a2d4.tar.gz blackbird-obmc-linux-270750dbc18a71b23d660df110e433ff9616a2d4.zip | |
hung_task: Display every hung task warning
When khungtaskd detects hung tasks, it prints out
backtraces from a number of those tasks.
Limiting the number of backtraces being printed
out can result in the user not seeing the information
necessary to debug the issue. The hung_task_warnings
sysctl controls this feature.
This patch makes it possible for hung_task_warnings
to accept a special value to print an unlimited
number of backtraces when khungtaskd detects hung
tasks.
The special value is -1. To use this value it is
necessary to change types from ulong to int.
Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: oleg@redhat.com
Link: http://lkml.kernel.org/r/1390239253-24030-3-git-send-email-atomlin@redhat.com
[ Build warning fix. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/sysctl.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h index 31e0193cb0c5..3a93f842306a 100644 --- a/include/linux/sched/sysctl.h +++ b/include/linux/sched/sysctl.h @@ -5,7 +5,7 @@ extern int sysctl_hung_task_check_count; extern unsigned int sysctl_hung_task_panic; extern unsigned long sysctl_hung_task_timeout_secs; -extern unsigned long sysctl_hung_task_warnings; +extern int sysctl_hung_task_warnings; extern int proc_dohung_task_timeout_secs(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); |
