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kconfig: limit trace buffer size to 88KB

Andrzej Hajda requested to merge andrzej.hajda/i915-infra:kconfig_limit_trace_log into master

Default trace buffer size is set to 1.4MB per CPU. In case of some errors whole trace buffer is dumped to dmesg, as a result CI collects huge dmesg logs and produces huge CI reports which causes browsers to hung/crash. Limiting size to 88KB should significantly decrease number of lines per trace dump. In theory it should be about 1000 lines/CPU, practical tests shows it is about 1300 lines. On system with 32CPUs it will be max 32000-42000 lines. Hopefully this change should not significantly affect bug analysis as the most errors are observed at the end of trace log.

Signed-off-by: Andrzej Hajda andrzej.hajda@intel.com

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