Hello, On Wed, Feb 23, 2022 at 6:31 PM Song Liu <song@xxxxxxxxxx> wrote: > > On Wed, Feb 23, 2022 at 4:05 PM Hao Luo <haoluo@xxxxxxxxxx> wrote: > > > > For binaries that are statically linked, consecutive stack frames are > > likely to be in the same VMA and therefore have the same build id. > > As an optimization for this case, we can cache the previous frame's > > VMA, if the new frame has the same VMA as the previous one, reuse the > > previous one's build id. We are holding the MM locks as reader across > > the entire loop, so we don't need to worry about VMA going away. > > > > Tested through "stacktrace_build_id" and "stacktrace_build_id_nmi" in > > test_progs. > > > > Suggested-by: Greg Thelen <gthelen@xxxxxxxxxx> > > Signed-off-by: Hao Luo <haoluo@xxxxxxxxxx> Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx> Thanks, Namhyung
