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| author | Sven Schnelle <svens@linux.ibm.com> | 2022-02-14 14:44:56 +0100 |
|---|---|---|
| committer | Alexander Grund <flamefire89@gmail.com> | 2023-11-09 18:31:03 +0100 |
| commit | de112f00e43a3c353a6b115a97241a2a4fda2d7d (patch) | |
| tree | 762f4e847d95cf79c452317a4948cadfdd7ef801 /include/linux/overflow.h | |
| parent | 5b251c9943f3989cbbd35f7405226ac4aa682f37 (diff) | |
tracing: Ensure trace buffer is at least 4096 bytes large
[ Upstream commit 7acf3a127bb7c65ff39099afd78960e77b2ca5de ]
Booting the kernel with 'trace_buf_size=1' give a warning at
boot during the ftrace selftests:
[ 0.892809] Running postponed tracer tests:
[ 0.892893] Testing tracer function:
[ 0.901899] Callback from call_rcu_tasks_trace() invoked.
[ 0.983829] Callback from call_rcu_tasks_rude() invoked.
[ 1.072003] .. bad ring buffer .. corrupted trace buffer ..
[ 1.091944] Callback from call_rcu_tasks() invoked.
[ 1.097695] PASSED
[ 1.097701] Testing dynamic ftrace: .. filter failed count=0 ..FAILED!
[ 1.353474] ------------[ cut here ]------------
[ 1.353478] WARNING: CPU: 0 PID: 1 at kernel/trace/trace.c:1951 run_tracer_selftest+0x13c/0x1b0
Therefore enforce a minimum of 4096 bytes to make the selftest pass.
Link: https://lkml.kernel.org/r/20220214134456.1751749-1-svens@linux.ibm.com
Change-Id: I796709bd9ccaefb463da0aca49f53a475b5f57a0
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux/overflow.h')
0 files changed, 0 insertions, 0 deletions