Re: [PATCH] sched/vtime: Prevent unstable evaluation of WARN(vtime->state)

[Frederic Weisbecker]

On Mon, Dec 30, 2019 at 09:04:36AM +0000, Chris Wilson wrote:
> As the vtime is sampled under loose seqcount protection by kcpustat, the
> vtime fields may change as the code flows. Where logic dictates a field
> has a static value, use a READ_ONCE.
> 
> Fixes: 74722bb223d0 ("sched/vtime: Bring up complete kcpustat accessor")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Frederic Weisbecker <frederic@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>

Oh thanks for taking the time to make it a proper patch!
Looks good, I'm relaying it.