From: Madhavan Srinivasan <maddy@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: chleroy@kernel.org, nysal@linux.ibm.com, mkchauras@linux.ibm.com,
rafael@kernel.org, daniel.lezcano@kernel.org,
christian.loehle@arm.com, mkchauras@gmail.com, npiggin@gmail.com,
linux-pm@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH v2] cpuidle: powerpc: avoid double clear when breaking snooze
Date: Wed, 8 Apr 2026 09:59:12 +0530 [thread overview]
Message-ID: <177562236430.1381144.27958537257316890.b4-ty@linux.ibm.com> (raw)
In-Reply-To: <20260311061709.1230440-1-sshegde@linux.ibm.com>
On Wed, 11 Mar 2026 11:47:09 +0530, Shrikanth Hegde wrote:
> snooze_loop is done often in any system which has fair bit of
> idle time. So it qualifies for even micro-optimizations.
>
> When breaking the snooze due to timeout, TIF_POLLING_NRFLAG is cleared
> twice. Clearing the bit invokes atomics. Avoid double clear and thereby
> avoid one atomic write.
>
> [...]
Applied to powerpc/next.
[1/1] cpuidle: powerpc: avoid double clear when breaking snooze
https://git.kernel.org/powerpc/c/64ed1e3e728afb57ba9acb59e69de930ead847d9
cheers
prev parent reply other threads:[~2026-04-08 4:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 6:17 [PATCH v2] cpuidle: powerpc: avoid double clear when breaking snooze Shrikanth Hegde
2026-04-08 4:29 ` Madhavan Srinivasan [this message]
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