Commit 088b1e42 authored by Steven Rostedt's avatar Steven Rostedt Committed by Thomas Gleixner

ftrace: pipe fixes

Some fixes for better output with the trace pipe.
Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent dcb6308f
......@@ -770,11 +770,6 @@ trace_entry_idx(struct trace_array *tr, struct trace_array_cpu *data,
array = page_address(page);
/* Still possible to catch up to the tail */
if (iter->next_idx[cpu] && array == data->trace_tail &&
iter->next_page_idx[cpu] == data->trace_tail_idx)
return NULL;
WARN_ON(iter->next_page_idx[cpu] >= ENTRIES_PER_PAGE);
return &array[iter->next_page_idx[cpu]];
}
......@@ -1921,7 +1916,6 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
struct trace_iterator *iter = filp->private_data;
struct trace_array_cpu *data;
static cpumask_t mask;
struct trace_entry *entry;
static int start;
unsigned long flags;
int read = 0;
......@@ -2013,10 +2007,15 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
cpu_set(cpu, mask);
}
while ((entry = find_next_entry_inc(iter)) != NULL) {
while (find_next_entry_inc(iter) != NULL) {
int len = iter->seq.len;
ret = print_trace_line(iter);
if (!ret)
if (!ret) {
/* don't print partial lines */
iter->seq.len = len;
break;
}
trace_consume(iter);
......
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