On Sat, Feb 03, 2024 at 07:33:51PM -0500, Steven Rostedt wrote:
> On Mon, 29 Jan 2024 14:27:58 +
> Vincent Donnefort wrote:
>
> > --- /dev/null
> > +++ b/include/uapi/linux/trace_mmap.h
> > @@ -0,0 +1,43 @@
> > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> > +#ifndef _TRAC
On Tue, 30 Jan 2024 16:22:06 +
Vincent Donnefort wrote:
> > > +static void rb_update_meta_page(struct ring_buffer_per_cpu *cpu_buffer)
> > > +{
> > > + struct trace_buffer_meta *meta = cpu_buffer->meta_page;
> > > +
> > > + WRITE_ONCE(meta->reader.read, cpu_buffer->reader_page->read);
> > > +
On Mon, 29 Jan 2024 14:27:58 +
Vincent Donnefort wrote:
> --- /dev/null
> +++ b/include/uapi/linux/trace_mmap.h
> @@ -0,0 +1,43 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +#ifndef _TRACE_MMAP_H_
> +#define _TRACE_MMAP_H_
> +
> +#include
> +
> +/**
> + * struct tra
On Tue, Jan 30, 2024 at 11:55:10PM +0900, Masami Hiramatsu wrote:
> Hi Vincent,
>
> Thanks for update the code.
>
> On Mon, 29 Jan 2024 14:27:58 +
> Vincent Donnefort wrote:
>
> > In preparation for allowing the user-space to map a ring-buffer, add
> > a set of mapping functions:
> >
> >
Hi Vincent,
Thanks for update the code.
On Mon, 29 Jan 2024 14:27:58 +
Vincent Donnefort wrote:
> In preparation for allowing the user-space to map a ring-buffer, add
> a set of mapping functions:
>
> ring_buffer_{map,unmap}()
> ring_buffer_map_fault()
>
> And controls on the ring-buf
In preparation for allowing the user-space to map a ring-buffer, add
a set of mapping functions:
ring_buffer_{map,unmap}()
ring_buffer_map_fault()
And controls on the ring-buffer:
ring_buffer_map_get_reader() /* swap reader and head */
Mapping the ring-buffer also involves:
A unique I
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