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Message-ID: <20231210040448.569462486@goodmis.org> Date: Sat, 09 Dec 2023 22:54:05 -0500 From: Steven Rostedt <rostedt@...dmis.org> To: linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Andrew Morton <akpm@...ux-foundation.org>, Tzvetomir Stoyanov <tz.stoyanov@...il.com>, Vincent Donnefort <vdonnefort@...gle.com>, Kent Overstreet <kent.overstreet@...il.com> Subject: [PATCH 01/14] ring-buffer: Refactor ring buffer implementation From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@...il.com> In order to introduce sub-buffer size per ring buffer, some internal refactoring is needed. As ring_buffer_print_page_header() will depend on the trace_buffer structure, it is moved after the structure definition. Link: https://lore.kernel.org/linux-trace-devel/20211213094825.61876-2-tz.stoyanov@gmail.com Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@...il.com> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org> --- kernel/trace/ring_buffer.c | 60 +++++++++++++++++++------------------- 1 file changed, 30 insertions(+), 30 deletions(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 3a5026702179..d59d14e67da1 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -381,36 +381,6 @@ static inline bool test_time_stamp(u64 delta) /* Events may have a timestamp attached to them */ #define BUF_MAX_EVENT_SIZE (BUF_MAX_DATA_SIZE - RB_LEN_TIME_EXTEND) -int ring_buffer_print_page_header(struct trace_seq *s) -{ - struct buffer_data_page field; - - trace_seq_printf(s, "\tfield: u64 timestamp;\t" - "offset:0;\tsize:%u;\tsigned:%u;\n", - (unsigned int)sizeof(field.time_stamp), - (unsigned int)is_signed_type(u64)); - - trace_seq_printf(s, "\tfield: local_t commit;\t" - "offset:%u;\tsize:%u;\tsigned:%u;\n", - (unsigned int)offsetof(typeof(field), commit), - (unsigned int)sizeof(field.commit), - (unsigned int)is_signed_type(long)); - - trace_seq_printf(s, "\tfield: int overwrite;\t" - "offset:%u;\tsize:%u;\tsigned:%u;\n", - (unsigned int)offsetof(typeof(field), commit), - 1, - (unsigned int)is_signed_type(long)); - - trace_seq_printf(s, "\tfield: char data;\t" - "offset:%u;\tsize:%u;\tsigned:%u;\n", - (unsigned int)offsetof(typeof(field), data), - (unsigned int)BUF_PAGE_SIZE, - (unsigned int)is_signed_type(char)); - - return !trace_seq_has_overflowed(s); -} - struct rb_irq_work { struct irq_work work; wait_queue_head_t waiters; @@ -576,6 +546,36 @@ struct ring_buffer_iter { int missed_events; }; +int ring_buffer_print_page_header(struct trace_seq *s) +{ + struct buffer_data_page field; + + trace_seq_printf(s, "\tfield: u64 timestamp;\t" + "offset:0;\tsize:%u;\tsigned:%u;\n", + (unsigned int)sizeof(field.time_stamp), + (unsigned int)is_signed_type(u64)); + + trace_seq_printf(s, "\tfield: local_t commit;\t" + "offset:%u;\tsize:%u;\tsigned:%u;\n", + (unsigned int)offsetof(typeof(field), commit), + (unsigned int)sizeof(field.commit), + (unsigned int)is_signed_type(long)); + + trace_seq_printf(s, "\tfield: int overwrite;\t" + "offset:%u;\tsize:%u;\tsigned:%u;\n", + (unsigned int)offsetof(typeof(field), commit), + 1, + (unsigned int)is_signed_type(long)); + + trace_seq_printf(s, "\tfield: char data;\t" + "offset:%u;\tsize:%u;\tsigned:%u;\n", + (unsigned int)offsetof(typeof(field), data), + (unsigned int)BUF_PAGE_SIZE, + (unsigned int)is_signed_type(char)); + + return !trace_seq_has_overflowed(s); +} + #ifdef RB_TIME_32 /* -- 2.42.0
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