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linux/tools/testing/selftests/ring-buffer/map_test.c

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ring-buffer/selftest: Add ring-buffer mapping test Map a ring-buffer, validate the meta-page before and after emitting few events. Also check ring-buffer mapping boundaries and finally ensure the tracing snapshot is mutually exclusive. Link: https://lore.kernel.org/linux-trace-kernel/20240510140435.3550353-6-vdonnefort@google.com Cc: Shuah Khan <shuah@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Acked-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-05-10 15:04:34 +01:00
selftests: complete kselftest include centralization This follow-up patch completes centralization of kselftest.h and ksefltest_harness.h includes in remaining seltests files, replacing all relative paths with a non-relative paths using shared -I include path in lib.mk Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on riscv, arm64, x86_64 and powerpc arch. [reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h] Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/ Reviewed-by: Wei Yang <richard.weiyang@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Günther Noack <gnoack@google.com> Cc: Jakub Kacinski <kuba@kernel.org> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mickael Salaun <mic@digikod.net> Cc: Ming Lei <ming.lei@redhat.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Simon Horman <horms@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-10-16 16:14:09 +05:30
ring-buffer/selftest: Add ring-buffer mapping test Map a ring-buffer, validate the meta-page before and after emitting few events. Also check ring-buffer mapping boundaries and finally ensure the tracing snapshot is mutually exclusive. Link: https://lore.kernel.org/linux-trace-kernel/20240510140435.3550353-6-vdonnefort@google.com Cc: Shuah Khan <shuah@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Acked-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-05-10 15:04:34 +01:00
selftests/ring-buffer: Handle meta-page bigger than the system 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 Link: https://lore.kernel.org/20240910162335.2993310-3-vdonnefort@google.com Acked-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-09-10 17:23:35 +01:00
ring-buffer/selftest: Add ring-buffer mapping test Map a ring-buffer, validate the meta-page before and after emitting few events. Also check ring-buffer mapping boundaries and finally ensure the tracing snapshot is mutually exclusive. Link: https://lore.kernel.org/linux-trace-kernel/20240510140435.3550353-6-vdonnefort@google.com Cc: Shuah Khan <shuah@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Acked-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-05-10 15:04:34 +01:00
selftests/ring-buffer: Handle meta-page bigger than the system 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 Link: https://lore.kernel.org/20240910162335.2993310-3-vdonnefort@google.com Acked-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-09-10 17:23:35 +01:00
ring-buffer/selftest: Add ring-buffer mapping test Map a ring-buffer, validate the meta-page before and after emitting few events. Also check ring-buffer mapping boundaries and finally ensure the tracing snapshot is mutually exclusive. Link: https://lore.kernel.org/linux-trace-kernel/20240510140435.3550353-6-vdonnefort@google.com Cc: Shuah Khan <shuah@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Acked-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-05-10 15:04:34 +01:00
selftests/ring-buffer: Add test for out-of-bound pgoff mapping Extend the ring-buffer mapping test coverage by checking an out-of-bound pgoff which has proven to be problematic in the past. Link: https://lore.kernel.org/r/20241218170318.2814991-1-vdonnefort@google.com Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2024-12-18 17:03:18 +00:00
ring-buffer/selftest: Add ring-buffer mapping test Map a ring-buffer, validate the meta-page before and after emitting few events. Also check ring-buffer mapping boundaries and finally ensure the tracing snapshot is mutually exclusive. Link: https://lore.kernel.org/linux-trace-kernel/20240510140435.3550353-6-vdonnefort@google.com Cc: Shuah Khan <shuah@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Acked-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-05-10 15:04:34 +01:00
ring-buffer: Align meta-page to sub-buffers for improved TLB usage Previously, the mapped ring-buffer layout caused misalignment between the meta-page and sub-buffers when the sub-buffer size was not a multiple of PAGE_SIZE. This prevented hardware with larger TLB entries from utilizing them effectively. Add a padding with the zero-page between the meta-page and sub-buffers. Also update the ring-buffer map_test to verify that padding. Link: https://lore.kernel.org/20240628104611.1443542-1-vdonnefort@google.com Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-06-28 11:46:11 +01:00
selftests/ring-buffer: Add test for out-of-bound pgoff mapping Extend the ring-buffer mapping test coverage by checking an out-of-bound pgoff which has proven to be problematic in the past. Link: https://lore.kernel.org/r/20241218170318.2814991-1-vdonnefort@google.com Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2024-12-18 17:03:18 +00:00
ring-buffer: Align meta-page to sub-buffers for improved TLB usage Previously, the mapped ring-buffer layout caused misalignment between the meta-page and sub-buffers when the sub-buffer size was not a multiple of PAGE_SIZE. This prevented hardware with larger TLB entries from utilizing them effectively. Add a padding with the zero-page between the meta-page and sub-buffers. Also update the ring-buffer map_test to verify that padding. Link: https://lore.kernel.org/20240628104611.1443542-1-vdonnefort@google.com Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-06-28 11:46:11 +01:00
selftests/ring-buffer: Verify the entire meta-page padding Improve the ring-buffer meta-page test coverage by checking for the entire padding region to be 0 instead of just looking at the first 4 bytes. Cc: linux-kselftest@vger.kernel.org Link: https://lore.kernel.org/20240910162335.2993310-2-vdonnefort@google.com Acked-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-09-10 17:23:34 +01:00
ring-buffer: Align meta-page to sub-buffers for improved TLB usage Previously, the mapped ring-buffer layout caused misalignment between the meta-page and sub-buffers when the sub-buffer size was not a multiple of PAGE_SIZE. This prevented hardware with larger TLB entries from utilizing them effectively. Add a padding with the zero-page between the meta-page and sub-buffers. Also update the ring-buffer map_test to verify that padding. Link: https://lore.kernel.org/20240628104611.1443542-1-vdonnefort@google.com Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-06-28 11:46:11 +01:00
ring-buffer/selftest: Add ring-buffer mapping test Map a ring-buffer, validate the meta-page before and after emitting few events. Also check ring-buffer mapping boundaries and finally ensure the tracing snapshot is mutually exclusive. Link: https://lore.kernel.org/linux-trace-kernel/20240510140435.3550353-6-vdonnefort@google.com Cc: Shuah Khan <shuah@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: linux-kselftest@vger.kernel.org Acked-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-05-10 15:04:34 +01:00