Re: [patch v1A 2/2] sched/ext: Remove sched_fork() hack

[Tejun Heo]

On Mon, Oct 28, 2024 at 02:20:35PM +0100, Thomas Gleixner wrote:
> Instead of solving the underlying problem of the double invocation of
> __sched_fork() for idle tasks, sched-ext decided to hack around the issue
> by partially clearing out the entity struct to preserve the already
> enqueued node. A provided analysis and solution has been ignored for four
> months.
> 
> Now that someone else has taken care of cleaning it up, remove the
> disgusting hack and clear out the full structure. Remove the comment in the
> structure declaration as well, as there is no requirement for @node being
> the last element anymore.
> 
> Fixes: f0e1a0643a59 ("sched_ext: Implement BPF extensible scheduler class")
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Tejun Heo <tj@xxxxxxxxxx>
> Cc: David Vernet <void@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Juri Lelli <juri.lelli@xxxxxxxxxx>
> Cc: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
> Cc: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Cc: Ben Segall <bsegall@xxxxxxxxxx>
> Cc: Mel Gorman <mgorman@xxxxxxx>
> Cc: Valentin Schneider <vschneid@xxxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

Thanks.

-- 
tejun