From: Steven Rostedt Date: Mon, 12 May 2008 19:20:48 +0000 (+0200) Subject: ftrace: pipe fixes X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=088b1e427dbba2af93cb6a7d39258c10ff58dd27;p=linux-beck.git ftrace: pipe fixes Some fixes for better output with the trace pipe. Signed-off-by: Steven Rostedt Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 70f94fa92c10..c56fc5e60133 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -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);