On 26/03/18 13:00, Matthew Auld wrote:
On 26 March 2018 at 10:08, Lionel Landwerlin
<lionel.g.landwerlin@xxxxxxxxx> wrote:
If 2 processes race to open the perf stream, it's possible that one of them
will see that OA buffer has already been allocated, while a previous process
is still finishing to reprogram the hardware (on gen8+).
But we grab the perf.lock while opening the perf stream, and we only
allow one exclusive stream. Maybe I'm missing something?
Arg, you're right...
The locking situation is really not obvious in this file.
I think we can drop this patch.
Thanks!
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