From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: perf: do not handle deleted counter in irq handler to avoid oops
Date: Tue, 21 Feb 2012 15:19:10 +0000 [thread overview]
Message-ID: <20120221151909.GA23133@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <CACVXFVMxpRDsG_hNn_WaX17uEdZCJmcraOvDwCL6JQ7Xyz5nig@mail.gmail.com>
On Tue, Feb 21, 2012 at 02:02:32PM +0000, Ming Lei wrote:
> On Tue, Feb 21, 2012 at 9:32 PM, Will Deacon <will.deacon@arm.com> wrote:
> > I have a couple of patches that solve this by (a) clearing the overflow flag
> > when disabling the counter for ARMv7 and (b) adding the event checks to the
>
> Maybe ARMv6 and xscale need to be fixed too if the overflow flag will be kept
> even after the counter is disabled.
I don't think so - seems like we clear the overflow flag already for those
PMUs in the disable path (note that we write ~mask).
Will
next prev parent reply other threads:[~2012-02-21 15:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-21 4:37 [PATCH] ARM: perf: do not handle deleted counter in irq handler to avoid oops Ming Lei
2012-02-21 13:32 ` Will Deacon
2012-02-21 14:02 ` Ming Lei
2012-02-21 15:19 ` Will Deacon [this message]
2012-02-21 15:34 ` Ming Lei
2012-02-21 15:40 ` Will Deacon
2012-02-21 15:49 ` Ming Lei
2012-02-21 15:57 ` Will Deacon
2012-02-21 17:36 ` Will Deacon
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