diff options
Diffstat (limited to 'tools/perf/Documentation/perf-buildid-cache.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-buildid-cache.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-buildid-cache.txt b/tools/perf/Documentation/perf-buildid-cache.txt index e9a8349a7172..fd77d81ea748 100644 --- a/tools/perf/Documentation/perf-buildid-cache.txt +++ b/tools/perf/Documentation/perf-buildid-cache.txt @@ -21,6 +21,19 @@ OPTIONS -a:: --add=:: Add specified file to the cache. +-k:: +--kcore:: + Add specified kcore file to the cache. For the current host that is + /proc/kcore which requires root permissions to read. Be aware that + running 'perf buildid-cache' as root may update root's build-id cache + not the user's. Use the -v option to see where the file is created. + Note that the copied file contains only code sections not the whole core + image. Note also that files "kallsyms" and "modules" must also be in the + same directory and are also copied. All 3 files are created with read + permissions for root only. kcore will not be added if there is already a + kcore in the cache (with the same build-id) that has the same modules at + the same addresses. Use the -v option to see if a copy of kcore is + actually made. -r:: --remove=:: Remove specified file from the cache. |