From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>,
linuxppc-dev <linuxppc-dev@ozlabs.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: powerpc/radix: Remove trace_tlbie call from radix__flush_tlb_all
Date: Mon, 22 Jan 2018 14:34:13 +1100 (AEDT) [thread overview]
Message-ID: <3zPxqn4ZDBz9sR8@ozlabs.org> (raw)
In-Reply-To: <151203273555.16587.12957613472048945542.stgit@jupiter.in.ibm.com>
On Thu, 2017-11-30 at 09:05:54 UTC, Mahesh J Salgaonkar wrote:
> From: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
>
> radix__flush_tlb_all() is called only in kexec path in real mode and any
> tracepoints at this stage will make kexec to fail if enabled.
>
> To verify enable tlbie trace before kexec.
>
> $ echo 1 > /sys/kernel/debug/tracing/events/powerpc/tlbie/enable
> == kexec into new kernel and kexec fails.
>
> Fix this by not calling trace_tlbie from radix__flush_tlb_all().
>
> Fixes: 0428491cba92 ("powerpc/mm: Trace tlbie(l) instructions")
> Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
> Acked-by: Balbir Singh <bsingharora@gmail.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/8d81296cfcce89013a714feb8d2500
cheers
prev parent reply other threads:[~2018-01-22 3:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-30 9:05 [PATCH] powerpc/radix: Remove trace_tlbie call from radix__flush_tlb_all Mahesh J Salgaonkar
2017-11-30 11:46 ` Balbir Singh
2018-01-22 3:34 ` Michael Ellerman [this message]
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