| Message ID | 20240910162335.2993310-3-vdonnefort@google.com |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On 9/10/24 12:50, Shuah Khan wrote: > On 9/10/24 10:45, Steven Rostedt wrote: >> >> Shuah, >> >> Can you take this through your tree? >> >> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> > > Yes I can take it through my tree. > >> >> -- Steve >> >> On Tue, 10 Sep 2024 17:23:35 +0100 >> Vincent Donnefort <vdonnefort@google.com> 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 <skhan@linuxfoundation.org> >>> Cc: linux-kselftest@vger.kernel.org >>> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> > > Vincent, > > Can you please rebase these on linux-kselftest next branch and > resend. This patch doesn't apply. > > Also please fix the subject to say: > > selfttests/ring-buffer Once this is fixed: Steve, This is yours to take due to the dependency on linux-trace/ring-buffer/for-next Acked-by: Shuah Khan <skhan@linuxfoundation.org> thanks, -- Shuah
On Wed, 11 Sep 2024 10:07:40 -0600 Shuah Khan <skhan@linuxfoundation.org> wrote: > Once this is fixed: > > Steve, This is yours to take due to the dependency on linux-trace/ring-buffer/for-next > > Acked-by: Shuah Khan <skhan@linuxfoundation.org> Thanks, I'll add it to my for-next queue. -- Steve
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; }
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 <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Signed-off-by: Vincent Donnefort <vdonnefort@google.com>