| #!/bin/sh | |
| # SPDX-License-Identifier: GPL-2.0 | |
| # description: Snapshot and tracing_cpumask | |
| # requires: trace_marker tracing_cpumask snapshot | |
| # flags: instance | |
| # This testcase is constrived to reproduce a problem that the cpu buffers | |
| # become unavailable which is due to 'record_disabled' of array_buffer and | |
| # max_buffer being messed up. | |
| # Store origin cpumask | |
| ORIG_CPUMASK=`cat tracing_cpumask` | |
| # Stop tracing all cpu | |
| echo 0 > tracing_cpumask | |
| # Take a snapshot of the main buffer | |
| echo 1 > snapshot | |
| # Restore origin cpumask, note that there should be some cpus being traced | |
| echo ${ORIG_CPUMASK} > tracing_cpumask | |
| # Set tracing on | |
| echo 1 > tracing_on | |
| # Write a log into buffer | |
| echo "test input 1" > trace_marker | |
| # Ensure the log writed so that cpu buffers are still available | |
| grep -q "test input 1" trace | |
| exit 0 |