From: Greg KH <gregkh@linuxfoundation.org>
To: "Ionut Nechita (Wind River)" <ionut.nechita@windriver.com>
Cc: stable@vger.kernel.org, rafael.j.wysocki@intel.com,
linux-pm@vger.kernel.org, christian.loehle@arm.com,
artem.bityutskiy@linux.intel.com, quic_zhonhan@quicinc.com,
aboorvad@linux.ibm.com
Subject: Re: [PATCH v2 6.12.y 0/6] cpuidle: menu: Backport get_typical_interval() improvements
Date: Sat, 21 Mar 2026 12:03:34 +0100 [thread overview]
Message-ID: <2026032124-crabgrass-friday-2788@gregkh> (raw)
In-Reply-To: <20260321103721.35114-1-ionut.nechita@windriver.com>
On Sat, Mar 21, 2026 at 12:37:15PM +0200, Ionut Nechita (Wind River) wrote:
> From: "Ionut Nechita" <ionut.nechita@windriver.com>
>
> This series backports 6 upstream commits that improve the menu
> governor's get_typical_interval() function to linux-6.12.y stable.
>
> These patches are already present in linux-6.18.y but were not picked
> up for 6.12.y because they lack Cc: stable tags.
>
> The key improvement is in patch 2/6 which merges the two separate loops
> for average and variance computation into a single pass, reducing the
> latency of menu_select() on isolated (nohz_full) cores. The remaining
> patches refactor outlier detection to cover both ends of the sample set,
> update documentation to match the new code, and add a minor bucket
> assignment optimization.
>
> After applying this series, drivers/cpuidle/governors/menu.c matches
> linux-6.18.y exactly.
>
> All patches are clean cherry-picks from mainline with one trivial
> conflict resolution in Documentation/admin-guide/pm/cpuidle.rst
> (patch 5/6).
>
> Changes since v1:
> - Added upstream commit IDs to each patch (Greg KH)
Still incorrect :(
prev parent reply other threads:[~2026-03-21 11:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-21 10:37 [PATCH v2 6.12.y 0/6] cpuidle: menu: Backport get_typical_interval() improvements Ionut Nechita (Wind River)
2026-03-21 10:37 ` [PATCH v2 6.12.y 1/6] cpuidle: menu: Drop a redundant local variable Ionut Nechita (Wind River)
2026-03-21 10:37 ` [PATCH v2 6.12.y 2/6] cpuidle: menu: Use one loop for average and variance computations Ionut Nechita (Wind River)
2026-03-21 10:37 ` [PATCH v2 6.12.y 3/6] cpuidle: menu: Tweak threshold use in get_typical_interval() Ionut Nechita (Wind River)
2026-03-21 10:37 ` [PATCH v2 6.12.y 4/6] cpuidle: menu: Eliminate outliers on both ends of the sample set Ionut Nechita (Wind River)
2026-03-21 10:37 ` [PATCH v2 6.12.y 5/6] cpuidle: menu: Update documentation after get_typical_interval() changes Ionut Nechita (Wind River)
2026-03-21 10:37 ` [PATCH v2 6.12.y 6/6] cpuidle: menu: Optimize bucket assignment when next_timer_ns equals KTIME_MAX Ionut Nechita (Wind River)
2026-03-21 11:03 ` Greg KH [this message]
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