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[DO NOT MERGE]: Add debug patches from Bo #105
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Signed-off-by: Bo He <[email protected]>
Pstore console follows global loglevel kernel parameter which is most of time set to a reasonable value, 5 as example, in order to keep real HW consoles with a low activity. This is an issue on production systems where the pstore console (console-ramoops file) is used in post-mortem debug as it misses all lower level messages and makes analysis harder. Kernel does not support the ability to ignore log level for a set of consoles. It supports only overall setting named ignore_level that affects all the consoles. This patch provides a fine tuning of the log level management per consoles by introducing CON_IGNORELEVEL flag. Apply this flag to pstore console allows to have full kernel messages on pstore console while still having a lower level on others. It ease debugging to always have full log level on pstore console, even on production devices where minimum debugging features are available. Signed-off-by: Bo He <[email protected]>
1. Add a new console flag CON_FAST in order to be able to disable slow consoles in cases where a considerable amount of data should be logged in a limited amount of time (eg. show_state in a WD warning interrupt) 2. Mark pstore console as CON_FAST Signed-off-by: Bo He <[email protected]>
Add a new panic handler that will be able to dump a full tasks state upon various panics. Because this dump could be time sensitive, also temporary disable the slow consoles during this. By default only soft/hard lockups and Kernel watchdog warning interrupts are targeted, but the functionality can be extended to all panics or forced disable by "force_en" and "force_dis" module parameters. Signed-off-by: Bo He <[email protected]>
Signed-off-by: Bo He <[email protected]>
Signed-off-by: Bo He <[email protected]>
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[DO NOT MERGE]: Add debug patches from Bo