Re: [PATCH v3 sched_ext/for-7.3 25/36] sched_ext: Add the SCX_CAP_ENQ_IMMED cap

Tejun Heo <[email protected]>
Newsgroups dev.linux.lists.sched-ext,org.kernel.vger.linux-kernel
Message-ID <[email protected]> 
On Tue, 07 Jul 2026 00:32:10 +0000, [email protected] wrote:
> - [High] The SCX_CAP_ENQ_IMMED capability inadvertently allows sub-schedulers to enqueue non-IMMED tasks to the local DSQ, breaking the CPU isolation guarantee.

At this patch ENQ_IMMED is the sole (baseline) cap, so a sub holding it
admits its local inserts. The ENQ vs ENQ_IMMED split that gates non-IMMED
work is introduced in a later patch - it's staged, not a hole in the
final tree.

Thanks.

-- 
tejun
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