From: "Steven Rostedt (Google)" <rost...@goodmis.org> If a trace_marker write is bigger than what trace_seq can hold, then it will print "LINE TOO BIG" message and not what was written.
Instead, if check if the write is bigger than the trace_seq and break it up by that size. Ideally, we could make the trace_seq dynamic that could hold this. But that's for another time. Signed-off-by: Steven Rostedt (Google) <rost...@goodmis.org> --- kernel/trace/trace.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 893e749713d3..2a21bc840fe7 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -7298,6 +7298,11 @@ tracing_mark_write(struct file *filp, const char __user *ubuf, if (cnt < FAULTED_SIZE) size += FAULTED_SIZE - cnt; + if (size > TRACE_SEQ_BUFFER_SIZE) { + cnt -= size - TRACE_SEQ_BUFFER_SIZE; + goto again; + } + buffer = tr->array_buffer.buffer; event = __trace_buffer_lock_reserve(buffer, TRACE_PRINT, size, tracing_gen_ctx()); -- 2.42.0