a67610e46e
Current permission 666 blocks bugreport use-case be able to copy interrupt traces into bugreport. Provide required permissions. Bug: 376124648 Test: Captured bugreport and traces are visible in that. Flag: EXEMPT, init rc change to modify permission Change-Id: Ib03ab97fcd65d18e2420421f8fc997eefd55570f Signed-off-by: Chintan Pandya <chintanpandya@google.com>
17 lines
1 KiB
Text
17 lines
1 KiB
Text
on init
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# With permissions 666, trace was not captured in the bugreport.
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# Apply relaxed permissions.
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chmod 777 /sys/kernel/tracing/instances/irq_gia_google
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chmod 777 /sys/kernel/tracing/instances/irq_gia_google/trace
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chown system system /sys/kernel/tracing/instances/irq_gia_google
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chown system system /sys/kernel/tracing/instances/irq_gia_google/trace
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# There are some very high frequency IRQ events happening all the time. Tracing
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# them is not absolute necessity, but a flood of them is noise for more interesting
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# events that we want to capture. All these high frequency IRQs have virq < 11.
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write /sys/kernel/tracing/instances/irq_gia_google/events/irq/filter "irq > 11"
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# Keep the buffer size small. This size is practically enough for debug purpose.
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# Having low size helps because this entire buffer gets dumped in bugreport.
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# Having a large size can impact bugreport size and time it takes to pack/unpack.
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write /sys/kernel/tracing/instances/irq_gia_google/buffer_size_kb 64
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