linux-kernel - Re: [PATCH] sched_ext: add a missing rcu_read_lock/unlock pair at scx_select_cpu

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Message-ID: <224d4751-469f-4fec-89b4-dff57a419eab@igalia.com>
Date: Sat, 9 Nov 2024 11:32:47 +0900
From: Changwoo Min <changwoo@...lia.com>
To: tj@...nel.org
Cc: arighi@...dia.com, void@...ifault.com, kernel-dev@...lia.com,
 linux-kernel@...r.kernel.org, changwoo@...edu
Subject: Re: [PATCH] sched_ext: add a missing rcu_read_lock/unlock pair at
 scx_select_cpu_dfl()

Hello,

On 24. 11. 9. 11:05, Tejun Heo wrote:
> Shouldn't RCU critical section cover the places where llc_cpus is deref'd?

You're right. The RCU critical section should be extended to
cover the almost entire scx_select_cpu_dfl() function. I will
prepare the 2nd version.

Thanks!
Changwoo