On Tue, 11 Jun 2024 21:39:37 -0400
Steven Rostedt wrote:
> >
> > Maybe explain why sometimes __rb_inc_dec_mapped() is called to
> > increment or decrement ->mapped, and sometimes it id done directly ?
> > I can see that the function also acquires the buffer mutex, which
> > isn't needed at the p
On Tue, 11 Jun 2024 16:53:43 -0700
Guenter Roeck wrote:
> >>> @@ -6403,7 +6407,8 @@ int ring_buffer_unmap(struct trace_buffer *buffer,
> >>> int cpu)
> >>> mutex_lock(&buffer->mutex);
> >>> raw_spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
> >>>
> >>> - cpu_buffer->
On 6/11/24 15:53, Steven Rostedt wrote:
On Tue, 11 Jun 2024 15:43:59 -0700
Guenter Roeck wrote:
On 6/11/24 12:28, Steven Rostedt wrote:
From: "Steven Rostedt (Google)"
In preparation for having the ring buffer mapped to a dedicated location,
which will have the same restrictions as user spa
On Tue, 11 Jun 2024 15:43:59 -0700
Guenter Roeck wrote:
> On 6/11/24 12:28, Steven Rostedt wrote:
> > From: "Steven Rostedt (Google)"
> >
> > In preparation for having the ring buffer mapped to a dedicated location,
> > which will have the same restrictions as user space memory mapped buffers,
On 6/11/24 12:28, Steven Rostedt wrote:
From: "Steven Rostedt (Google)"
In preparation for having the ring buffer mapped to a dedicated location,
which will have the same restrictions as user space memory mapped buffers,
allow it to use the "mapped" field of the ring_buffer_per_cpu structure
wi
From: "Steven Rostedt (Google)"
In preparation for having the ring buffer mapped to a dedicated location,
which will have the same restrictions as user space memory mapped buffers,
allow it to use the "mapped" field of the ring_buffer_per_cpu structure
without having the user space meta page mapp
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