On Mon, Nov 09, 2020 at 10:53:54PM +0100, Jiri Olsa wrote:
> There's new misc bit for mmap2 to signal there's build
> id data in it:
>
> #define PERF_RECORD_MISC_BUILD_ID (1 << 14)
PERF_RECORD_MISC_MMAP_BUILD_ID would be consistent with the existing
PERF_RECORD_MISC_MMAP_DATA naming.
Also, AFAICT there's still a bunch of unused bits in misc.
012 CDEF
|||---------||||
Where:
0-2 CPUMODE_MASK
C PROC_MAP_PARSE_TIMEOUT
D MMAP_DATA / COMM_EXEC / FORK_EXEC / SWITCH_OUT
E EXACT_IP / SCHED_OUT_PREEMPT
F (reserved)
Maybe we should put in a comment to keep track of the hole ?
Also, perhaps it is time to use F to indicate that @size is in 8 instead
of 1 ? That would increase our max entry size to 512K, people seem to
hit his 64K limit (insane as it is).
