From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org, Phil Auld <pauld@redhat.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3] arch/arm64: Fix topology initialization for core scheduling
Date: Mon, 4 Apr 2022 11:10:48 +0100 [thread overview]
Message-ID: <164906426317.23108.12415745228600027656.b4-ty@kernel.org> (raw)
In-Reply-To: <20220331153926.25742-1-pauld@redhat.com>
On Thu, 31 Mar 2022 11:39:26 -0400, Phil Auld wrote:
> Arm64 systems rely on store_cpu_topology() to call update_siblings_masks()
> to transfer the toplogy to the various cpu masks. This needs to be done
> before the call to notify_cpu_starting() which tells the scheduler about
> each cpu found, otherwise the core scheduling data structures are setup
> in a way that does not match the actual topology.
>
> With smt_mask not setup correctly we bail on `cpumask_weight(smt_mask) == 1`
> for !leaders in:
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arch/arm64: Fix topology initialization for core scheduling
https://git.kernel.org/arm64/c/5524cbb1bfcd
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
next prev parent reply other threads:[~2022-04-04 10:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-31 15:39 Phil Auld
2022-04-04 10:10 ` Will Deacon [this message]
2022-04-04 14:26 ` Phil Auld
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