On Fri, 10 May 2024 12:03:12 +0100
Vincent Donnefort wrote:
> > I'm not particularly happy about us calling vm_insert_pages with NULL
> > pointers stored in pages.
> >
> > Should we instead do
> >
> > if (WARN_ON_ONCE(s >= nr_subbufs)) {
> > err = -EINVAL;
> > goto out;
> > }
> >
> > ?
[...]
> > > +
> > > + while (s < nr_subbufs && p < nr_pages) {
> > > + struct page *page = virt_to_page(cpu_buffer->subbuf_ids[s]);
> > > + int off = 0;
> > > +
> > > + for (; off < (1 << (subbuf_order)); off++, page++) {
> > > + if (p >= nr_pages)
> > > +
On Fri, May 10, 2024 at 11:15:59AM +0200, David Hildenbrand wrote:
> On 09.05.24 13:05, Vincent Donnefort wrote:
> > On Tue, May 07, 2024 at 10:34:02PM -0400, Steven Rostedt wrote:
> > > On Tue, 30 Apr 2024 12:13:51 +0100
> > > Vincent Donnefort wrote:
> > >
> > > > +#ifdef CONFIG_MMU
> > > > +st
On 08.05.24 04:34, Steven Rostedt wrote:
On Tue, 30 Apr 2024 12:13:51 +0100
Vincent Donnefort wrote:
+#ifdef CONFIG_MMU
+static int __rb_map_vma(struct ring_buffer_per_cpu *cpu_buffer,
+ struct vm_area_struct *vma)
+{
+ unsigned long nr_subbufs, nr_pages, vma_pages,
On 09.05.24 13:05, Vincent Donnefort wrote:
On Tue, May 07, 2024 at 10:34:02PM -0400, Steven Rostedt wrote:
On Tue, 30 Apr 2024 12:13:51 +0100
Vincent Donnefort wrote:
+#ifdef CONFIG_MMU
+static int __rb_map_vma(struct ring_buffer_per_cpu *cpu_buffer,
+ struct vm_area_st
On Tue, May 07, 2024 at 10:34:02PM -0400, Steven Rostedt wrote:
> On Tue, 30 Apr 2024 12:13:51 +0100
> Vincent Donnefort wrote:
>
> > +#ifdef CONFIG_MMU
> > +static int __rb_map_vma(struct ring_buffer_per_cpu *cpu_buffer,
> > + struct vm_area_struct *vma)
> > +{
> > + unsigned
On Tue, 30 Apr 2024 12:13:51 +0100
Vincent Donnefort wrote:
> +#ifdef CONFIG_MMU
> +static int __rb_map_vma(struct ring_buffer_per_cpu *cpu_buffer,
> + struct vm_area_struct *vma)
> +{
> + unsigned long nr_subbufs, nr_pages, vma_pages, pgoff = vma->vm_pgoff;
> + unsign
On Thu, 2 May 2024 14:38:32 +0100
Vincent Donnefort wrote:
> > > + while (s < nr_subbufs && p < nr_pages) {
> > > + struct page *page = virt_to_page(cpu_buffer->subbuf_ids[s]);
> > > + int off = 0;
> > > +
> > > + for (; off < (1 << (subbuf_order)); off++, page++) {
> > >
On Thu, May 02, 2024 at 03:30:32PM +0200, David Hildenbrand wrote:
> On 30.04.24 13:13, 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}()
> >
> > And controls on the ring-buffer:
>
On 30.04.24 13:13, 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}()
And controls on the ring-buffer:
ring_buffer_map_get_reader() /* swap reader and head */
Mapping the ring-buffer also i
In preparation for allowing the user-space to map a ring-buffer, add
a set of mapping functions:
ring_buffer_{map,unmap}()
And controls on the ring-buffer:
ring_buffer_map_get_reader() /* swap reader and head */
Mapping the ring-buffer also involves:
A unique ID for each subbuf of the r
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