From: Tejun Heo <tj@kernel.org>
To: Andrea Righi <arighi@nvidia.com>
Cc: David Vernet <void@manifault.com>,
Changwoo Min <changwoo@igalia.com>,
Emil Tsalapatis <emil@etsalapatis.com>,
sched-ext@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 sched_ext/for-7.1-fixes] sched_ext: Fix ops->priv clobber on concurrent attach/detach
Date: Sun, 10 May 2026 21:47:52 -1000 [thread overview]
Message-ID: <0dd41fa159da749a1e3ea88cfdbcca17@kernel.org> (raw)
In-Reply-To: <20260511061812.2459458-1-arighi@nvidia.com>
Hello, Andrea.
Applied to sched_ext/for-7.1-fixes.
One followup if you have cycles: scx_alloc_and_add_sched() can still
fail after rcu_assign_pointer(ops->priv, sch) (sub-sched
kzalloc/kstrdup and kobject paths). With the new gate, that would
leave the kdata permanently -EBUSY. Could probably be addressed by
clearing @ops->priv on those error paths.
Thanks.
--
tejun
next prev parent reply other threads:[~2026-05-11 7:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-11 6:18 [PATCH v2 sched_ext/for-7.1-fixes] sched_ext: Fix ops->priv clobber on concurrent attach/detach Andrea Righi
2026-05-11 7:47 ` Tejun Heo [this message]
2026-05-11 7:52 ` Andrea Righi
2026-05-12 0:21 ` sashiko-bot
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