Re: [PATCH v2] sched_ext: Avoid flooding the log with deprecation warnings

[Tejun Heo]

On Wed, Jun 24, 2026 at 02:27:43AM -0700, Breno Leitao wrote:
> The deprecation notices for direct p->scx.slice/dsq_vtime writes and for
> ops->cpu_acquire/release() use plain pr_warn(), so they repeat on every
> scheduler (re)load and can flood the kernel log.
> 
> The slice/dsq_vtime notice is the worst offender: it is emitted from the
> BPF verifier's btf_struct_access callback, which is re-evaluated as the
> verifier explores program paths, so a single scheduler load can print it
> many times -- hundreds of lines on some hosts, dozens within the same
> second.
> 
> Switch both notices to pr_warn_ratelimited() so each deprecation is still
> reported but bursts no longer spam the log, and add the missing newline
> to the slice/dsq_vtime message.
> 
> Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>

Applied to sched_ext/for-7.2-fixes.

Thanks.

-- 
tejun