Shuah,
Can you take this through your tree? Acked-by: Steven Rostedt (Google) <[email protected]> -- Steve On Tue, 10 Sep 2024 17:23:35 +0100 Vincent Donnefort <[email protected]> wrote: > Handle the case where the meta-page content is bigger than the system > page-size. This prepares the ground for extending features covered by > the meta-page. > > Cc: Shuah Khan <[email protected]> > Cc: [email protected] > Signed-off-by: Vincent Donnefort <[email protected]> > > diff --git a/tools/testing/selftests/ring-buffer/map_test.c > b/tools/testing/selftests/ring-buffer/map_test.c > index ba12fd31de87..d10a847130fb 100644 > --- a/tools/testing/selftests/ring-buffer/map_test.c > +++ b/tools/testing/selftests/ring-buffer/map_test.c > @@ -92,12 +92,22 @@ int tracefs_cpu_map(struct tracefs_cpu_map_desc *desc, > int cpu) > if (desc->cpu_fd < 0) > return -ENODEV; > > +again: > map = mmap(NULL, page_size, PROT_READ, MAP_SHARED, desc->cpu_fd, 0); > if (map == MAP_FAILED) > return -errno; > > desc->meta = (struct trace_buffer_meta *)map; > > + /* the meta-page is bigger than the original mapping */ > + if (page_size < desc->meta->meta_struct_len) { > + int meta_page_size = desc->meta->meta_page_size; > + > + munmap(desc->meta, page_size); > + page_size = meta_page_size; > + goto again; > + } > + > return 0; > } >
