From: Tejun Heo <tj@kernel.org>
To: sashiko-bot@kernel.org
Cc: sched-ext@lists.linux.dev
Subject: Re: [PATCH v2 sched_ext/for-7.3 10/36] sched_ext: Add ops.init_cids() to finalize the cid layout before init
Date: Mon, 06 Jul 2026 13:40:37 -1000 [thread overview]
Message-ID: <9112f6dac01fbc77fc9080376b6bff1e@kernel.org> (raw)
In-Reply-To: <20260706020817.2F1771F000E9@smtp.kernel.org>
On Mon, 06 Jul 2026 02:08:16 +0000, sashiko-bot wrote:
> - [High] `scx_bpf_cid_override()` failures are masked, leading to full enablement of a broken scheduler with corrupted CID layouts.
False positive. scx_bpf_cid_override() reports failure via scx_error(),
which aborts enable, not via a return value, so a bad override isn't masked -
the scheduler stays bypassed and the disable path hands its tasks back to the
parent/fair. The layout is also validate-then-apply.
next prev parent reply other threads:[~2026-07-06 23:40 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-06 1:40 [PATCHSET v2 sched_ext/for-7.3] sched_ext: Capability-based CPU delegation for sub-schedulers Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 01/36] sched_ext: Add SCX_CALL_CID_OP_TASK() for cid-form op dispatch Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 02/36] sched_ext: Rename extra_enq_flags to remote_activate_enq_flags Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 03/36] sched_ext: Fix premature ops->priv publication in scx_alloc_and_add_sched() Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 04/36] tools/sched_ext: scx - Fix cmask_subset(), cmask_equal() and cmask_weight() Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 05/36] sched_ext: Use READ_ONCE/WRITE_ONCE in cmask word ops and drop _RACY variants Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 06/36] tools/sched_ext: scx_qmap - Use bare u64/u32/s32 integer types Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 07/36] sched_ext: Reject direct slice and dsq_vtime writes for cid-form schedulers Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 08/36] sched_ext: Make scx_bpf_kick_cid() return void Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 09/36] sched_ext: Make the kick machinery per-sched Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 10/36] sched_ext: Add ops.init_cids() to finalize the cid layout before init Tejun Heo
2026-07-06 2:08 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo [this message]
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 11/36] sched_ext: Add CID sharding Tejun Heo
2026-07-06 1:53 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 12/36] sched_ext: Add shard boundaries to scx_bpf_cid_override() Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 13/36] sched_ext: Defer scx_sched kobj sysfs add into the enable workfns Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 14/36] sched_ext: Add per-shard scx_sched storage scaffolding Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 15/36] sched_ext: Add scx_cmask_ref for validated arena cmask access Tejun Heo
2026-07-06 1:58 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 9:04 ` Andrea Righi
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 16/36] sched_ext: Build the set_cmask scratch from trusted geometry Tejun Heo
2026-07-06 1:59 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 17/36] sched_ext: RCU-protect the sub-sched tree's children/sibling lists Tejun Heo
2026-07-06 2:08 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 18/36] sched_ext: Add scx_skip_subtree_pre() Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 19/36] sched_ext: Add per-shard cap delegation for sub-schedulers Tejun Heo
2026-07-06 2:13 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 20/36] sched_ext: Add coalescing sub_caps_updated() notifier " Tejun Heo
2026-07-06 2:06 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 21/36] sched_ext: Maintain per-cpu effective cap copies for single-read checks Tejun Heo
2026-07-06 2:07 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 22/36] sched_ext: Add sub_ecaps_updated() effective-cap change notifier Tejun Heo
2026-07-06 2:09 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 23/36] sched_ext: Generalize local-DSQ handling to rq-owned DSQs Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 24/36] sched_ext: Add reject DSQ for cap-rejected dispatches Tejun Heo
2026-07-06 2:08 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 25/36] sched_ext: Add the SCX_CAP_ENQ_IMMED cap Tejun Heo
2026-07-06 2:10 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 26/36] sched_ext: Assign a unique id to each scheduler instance Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 27/36] sched_ext: Route task slice writes through set_task_slice() Tejun Heo
2026-07-06 2:05 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 9:10 ` Andrea Righi
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 28/36] sched_ext: Tie cpu occupancy to SCX_CAP_BASE through the task slice Tejun Heo
2026-07-06 2:07 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 29/36] sched_ext: Add the SCX_CAP_ENQ cap Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 30/36] sched_ext: Gate kicks on SCX_CAP_BASE and preemption on SCX_CAP_PREEMPT Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 31/36] sched_ext: Authorize remote-move inserts against the placing scheduler Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 32/36] sched_ext: Route ops.update_idle() to sub-schedulers and re-notify owed scheds Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 33/36] sched_ext: Replay ecaps notifications suppressed by bypass Tejun Heo
2026-07-06 2:11 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 34/36] sched_ext: Add scx_bpf_sub_kill() to evict a child sub-scheduler Tejun Heo
2026-07-06 2:12 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 35/36] tools/sched_ext: scx_qmap - Expand hierarchical sub-scheduling Tejun Heo
2026-07-06 2:10 ` sashiko-bot
2026-07-06 23:40 ` Tejun Heo
2026-07-06 1:40 ` [PATCH v2 sched_ext/for-7.3 36/36] tools/sched_ext: scx_qmap - Add sub-sched cap fault injection Tejun Heo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=9112f6dac01fbc77fc9080376b6bff1e@kernel.org \
--to=tj@kernel.org \
--cc=sashiko-bot@kernel.org \
--cc=sched-ext@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.