From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: mpe@ellerman.id.au, Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: bigeasy@linutronix.de, maddy@linux.ibm.com,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc/perf: Invoke per-CPU variable access with disabled interrupts
Date: Thu, 10 Dec 2020 22:29:38 +1100 (AEDT) [thread overview]
Message-ID: <160756606088.1313423.7680198073032760397.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <1606814880-1720-1-git-send-email-atrajeev@linux.vnet.ibm.com>
On Tue, 1 Dec 2020 04:28:00 -0500, Athira Rajeev wrote:
> The power_pmu_event_init() callback access per-cpu variable
> (cpu_hw_events) to check for event constraints and Branch Stack
> (BHRB). Current usage is to disable preemption when accessing the
> per-cpu variable, but this does not prevent timer callback from
> interrupting event_init. Fix this by using 'local_irq_save/restore'
> to make sure the code path is invoked with disabled interrupts.
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/perf: Invoke per-CPU variable access with disabled interrupts
https://git.kernel.org/powerpc/c/f66de7ac4849eb42a7b18e26b8ee49e08130fd27
cheers
prev parent reply other threads:[~2020-12-10 12:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-01 9:28 [PATCH] powerpc/perf: Invoke per-CPU variable access with disabled interrupts Athira Rajeev
2020-12-10 11:29 ` Michael Ellerman [this message]
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