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ftrace: new continue entry - separate out from trace_entry

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Some tracers will need to work with more than one entry. In order to do this
the trace_entry structure was split into two fields. One for the start of
all entries, and one to continue an existing entry.

The trace_entry structure now has a "field" entry that consists of the previous
content of the trace_entry, and a "cont" entry that is just a string buffer
the size of the "field" entry.

Thanks to Andrew Morton for suggesting this idea.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt
2008-08-01 12:26:40 -04:00
committed by Ingo Molnar
parent fed1939c64
commit 2e2ca155cd
3 changed files with 160 additions and 136 deletions
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12
kernel/trace/trace_mmiotrace.c
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@@ -174,14 +174,14 @@ print_out:
static int mmio_print_rw(struct trace_iterator *iter)
{
struct trace_entry *entry = iter->ent;
struct mmiotrace_rw *rw = &entry->mmiorw;
struct mmiotrace_rw *rw = &entry->field.mmiorw;
struct trace_seq *s = &iter->seq;
unsigned long long t = ns2usecs(entry->t);
unsigned long long t = ns2usecs(entry->field.t);
unsigned long usec_rem = do_div(t, 1000000ULL);
unsigned secs = (unsigned long)t;
int ret = 1;
switch (entry->mmiorw.opcode) {
switch (entry->field.mmiorw.opcode) {
case MMIO_READ:
ret = trace_seq_printf(s,
"R %d %lu.%06lu %d 0x%llx 0x%lx 0x%lx %d\n",
@@ -216,14 +216,14 @@ static int mmio_print_rw(struct trace_iterator *iter)
static int mmio_print_map(struct trace_iterator *iter)
{
struct trace_entry *entry = iter->ent;
struct mmiotrace_map *m = &entry->mmiomap;
struct mmiotrace_map *m = &entry->field.mmiomap;
struct trace_seq *s = &iter->seq;
unsigned long long t = ns2usecs(entry->t);
unsigned long long t = ns2usecs(entry->field.t);
unsigned long usec_rem = do_div(t, 1000000ULL);
unsigned secs = (unsigned long)t;
int ret = 1;
switch (entry->mmiorw.opcode) {
switch (entry->field.mmiorw.opcode) {
case MMIO_PROBE:
ret = trace_seq_printf(s,
"MAP %lu.%06lu %d 0x%llx 0x%lx 0x%lx 0x%lx %d\n",