From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/5] arm_pmu: fix lockdep issues with ACPI systems
Date: Mon, 11 Dec 2017 17:38:18 +0000 [thread overview]
Message-ID: <20171211173817.GE3275@arm.com> (raw)
In-Reply-To: <20171101141239.45340-1-mark.rutland@arm.com>
On Wed, Nov 01, 2017 at 02:12:34PM +0000, Mark Rutland wrote:
> Currently the arm_pmu ACPI code is somewhat dubious. It attempts ot
> allocate memory any manpiulate IRQs in a hotplug callback, which is an
> atomic context.
>
> These patches (based on the arm64 for-next/core branch [1]) attempt to
> address this by moving work out of hotplug callback, requiring a
> reorganisation of the common arm_pmu code.
>
> I've given these a boot-test on a Juno R1 system, both with DT and ACPI.
> In either case the PMU works as expected, and lockdep seems happy.
>
> I've pushed the series out to my arm64/acpi-pmu-lockdep branch [2].
This mostly looks ok to me; I've left some minor comments on individual
patches. My main concern is taking this as a fix, because there's an awful
lot here.
Is there anything simpler we can do for 4.15/stable?
Will
prev parent reply other threads:[~2017-12-11 17:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-01 14:12 [PATCH 0/5] arm_pmu: fix lockdep issues with ACPI systems Mark Rutland
2017-11-01 14:12 ` [PATCH 1/5] arm_pmu: fold platform helpers into platform code Mark Rutland
2017-11-01 14:12 ` [PATCH 2/5] arm_pmu: have armpmu_alloc() take GFP flags Mark Rutland
2017-12-06 6:54 ` Zhangshaokun
2017-12-11 17:37 ` Will Deacon
2017-12-11 18:02 ` Mark Rutland
2017-11-01 14:12 ` [PATCH 3/5] arm_pmu: acpi: check for mismatched PPIs Mark Rutland
2017-12-11 17:37 ` Will Deacon
2017-12-11 18:08 ` Mark Rutland
2017-12-11 18:43 ` Will Deacon
2017-11-01 14:12 ` [PATCH 4/5] arm_pmu: note IRQs/PMUs per-cpu Mark Rutland
2017-12-11 17:36 ` Will Deacon
2017-12-11 18:15 ` Mark Rutland
2017-11-01 14:12 ` [PATCH 5/5] arm_pmu: acpi: request IRQs up-front Mark Rutland
2017-12-11 17:36 ` Will Deacon
2017-12-11 17:55 ` Mark Rutland
2017-12-11 18:45 ` Will Deacon
2017-11-01 17:02 ` [PATCH 0/5] arm_pmu: fix lockdep issues with ACPI systems Tyler Baicar
2017-12-11 17:38 ` Will Deacon [this message]
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