PANIC: Invalid concurrent access to page 0x82a87348 (start), currently accessed by: 6

[mmadia]

hrev35012-gcc2hybrid. while trying to reproduce #5138 with user_config_headers/tracing_config.h:

// enable tracing (0/1)
#ifndef ENABLE_TRACING
#	define ENABLE_TRACING 1
#endif

// tracing buffer size (in bytes)
#ifndef MAX_TRACE_SIZE
#	define MAX_TRACE_SIZE (300 * 1024 * 1024)
#endif

...
#define SYSCALL_TRACING_IGNORE_KTRACE_OUTPUT	1
...
#define VM_CACHE_TRACING						2
...

a KDL PANIC: Invalid concurrent access to page 0x82a87348 (start), currently accessed by: 6 occured within seconds of starting jam -aqj3 @alpha-raw

After several 'co', Haiku recovered.

backtrace attached.