From: Peter Zijlstra <peterz@infradead.org>
To: Kevin Hao <haokexin@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Ingo Molnar <mingo@kernel.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH 1/8] jump_label: no need to acquire the jump_label_mutex in jump_lable_init()
Date: Thu, 20 Aug 2015 20:29:03 +0200 [thread overview]
Message-ID: <20150820182903.GA3161@worktop.event.rightround.com> (raw)
In-Reply-To: <1440072876-8321-2-git-send-email-haokexin@gmail.com>
On Thu, Aug 20, 2015 at 08:14:29PM +0800, Kevin Hao wrote:
> The jump_label_init() run in a very early stage, even before the
> sched_init(). So there is no chance for concurrent access of the
> jump label table.
It also doesn't hurt to have it. Its better to be consistent and
conservative with locking unless there is a pressing need.
next prev parent reply other threads:[~2015-08-20 18:29 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-20 12:14 [PATCH 0/8] powerpc: use jump label for {cpu,mmu}_has_feature() Kevin Hao
2015-08-20 12:14 ` [PATCH 1/8] jump_label: no need to acquire the jump_label_mutex in jump_lable_init() Kevin Hao
2015-08-20 18:29 ` Peter Zijlstra [this message]
2015-08-21 3:17 ` Kevin Hao
2015-08-20 12:14 ` [PATCH 2/8] jump_label: make it possible for the archs to invoke jump_label_init() much earlier Kevin Hao
2015-08-20 12:14 ` [PATCH 3/8] jump_label: introduce DEFINE_STATIC_KEY_{TRUE, FALSE}_ARRAY macros Kevin Hao
2015-08-20 18:31 ` [PATCH 3/8] jump_label: introduce DEFINE_STATIC_KEY_{TRUE,FALSE}_ARRAY macros Peter Zijlstra
2015-08-21 3:23 ` Kevin Hao
2015-08-21 6:28 ` Ingo Molnar
2015-08-21 6:34 ` Kevin Hao
2015-08-21 6:40 ` Ingo Molnar
2015-08-21 6:45 ` Kevin Hao
2015-08-20 12:14 ` [PATCH 4/8] powerpc: invoke jump_label_init() in a much earlier stage Kevin Hao
2015-08-20 12:14 ` [PATCH 5/8] powerpc: kill mfvtb() Kevin Hao
2015-08-20 12:14 ` [PATCH 6/8] powerpc: move the cpu_has_feature to a separate file Kevin Hao
2015-08-20 12:14 ` [PATCH 7/8] powerpc: use the jump label for cpu_has_feature Kevin Hao
2015-08-20 12:14 ` [PATCH 8/8] powerpc: use jump label for mmu_has_feature Kevin Hao
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