On Mon, 4 Mar 2024 16:43:46 -0800 Randy Dunlap <rdun...@infradead.org> wrote:
> > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c > > index 8198bfc54b58..d68544aef65f 100644 > > --- a/kernel/trace/trace.c > > +++ b/kernel/trace/trace.c > > @@ -7320,6 +7320,17 @@ tracing_mark_write(struct file *filp, const char > > __user *ubuf, > > if ((ssize_t)cnt < 0) > > return -EINVAL; > > > > + /* > > + * TRACE_SEQ_SIZE is the total size of trace_seq buffer used > > + * for output. As the print event outputs more than just > > + * the string written, keep it smaller than the trace_seq > > + * as it could drop the event if the extra data makes it bigger > > + * than what the trace_seq can hold. Half he TRACE_SEQ_SIZE > > the I honestly think my 't' key isn't triggering as much. At least when before hitting 'h', as I noticed I've been writing "he", "hey" and "here" a lot, and spell check isn't (obviously) catching it ;-) -- Steve > > > + * is more than enough. > > + */ > > + if (cnt > TRACE_SEQ_SIZE / 2) > > + cnt = TRACE_SEQ_SIZE / 2; > > + > > meta_size = sizeof(*entry) + 2; /* add '\0' and possible '\n' */ > > again: > > size = cnt + meta_size; > >
