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Date: Tue, 14 Jul 2026 13:56:15 -1000
Message-ID: <7c5d028a7a46a2917a3fcc8d1eccf084@kernel.org>
To: zhidao su (Xiaomi) <soolaugust@gmail.com>
Cc: David Vernet <void@manifault.com>,
 Andrea Righi <arighi@nvidia.com>,
 Changwoo Min <changwoo@igalia.com>,
 Ingo Molnar <mingo@redhat.com>,
 Peter Zijlstra <peterz@infradead.org>,
 Juri Lelli <juri.lelli@redhat.com>,
 Vincent Guittot <vincent.guittot@linaro.org>,
 Dietmar Eggemann <dietmar.eggemann@arm.com>,
 Steven Rostedt <rostedt@goodmis.org>,
 Ben Segall <bsegall@google.com>,
 Mel Gorman <mgorman@suse.de>,
 Valentin Schneider <vschneid@redhat.com>,
 K Prateek Nayak <kprateek.nayak@amd.com>,
 sched-ext@lists.linux.dev,
 linux-kernel@vger.kernel.org,
 bpf@vger.kernel.org
From: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH] sched_ext: Validate cid override before updating tables
In-Reply-To: <20260714024704.3318132-1-soolaugust@gmail.com>
References: <20260714024704.3318132-1-soolaugust@gmail.com>
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Hello.

for-7.3 already does this. scx_bpf_cid_override() validates the whole
mapping first (cid_valid() and the duplicate check) and only writes
scx_cpu_to_cid_tbl/scx_cid_to_cpu_tbl in a second pass, so a failed
override leaves the tables untouched. It also kmemdup()s the input up
front to avoid a concurrent-mutation race.

The patch is against an older cid.c and no longer applies, so no respin
is needed.

Thanks.

-- 
tejun