From: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
To: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: linuxppc-dev <linuxppc-dev@ozlabs.org>,
syzkaller@googlegroups.com, Paul Mackerras <paulus@samba.org>,
Nicholas Piggin <npiggin@gmail.com>,
Andrew Donnellan <andonnel@au1.ibm.com>
Subject: Re: [PATCH] Disable kcov for slb routines.
Date: Thu, 7 Mar 2019 10:07:36 +0530 [thread overview]
Message-ID: <20190307043736.GA1809@sathnaga86> (raw)
In-Reply-To: <155168793242.4372.10864050702181452671.stgit@jupiter.in.ibm.com>
On Mon, Mar 04, 2019 at 01:55:51PM +0530, Mahesh J Salgaonkar wrote:
> From: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
>
> The kcov instrumentation inside SLB routines causes duplicate SLB entries
> to be added resulting into SLB multihit machine checks.
> Disable kcov instrumentation on slb.o
>
> Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
> ---
> arch/powerpc/mm/Makefile | 1 +
> 1 file changed, 1 insertion(+)
Fixes: https://github.com/linuxppc/issues/issues/230
Tested-by: Satheesh Rajendran <sathnaga@linux.vent.ibm.com>
>
> diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
> index d4d32e229ace..f9cb40684746 100644
> --- a/arch/powerpc/mm/Makefile
> +++ b/arch/powerpc/mm/Makefile
> @@ -60,3 +60,4 @@ obj-$(CONFIG_PPC_MEM_KEYS) += pkeys.o
> # This is necessary for booting with kcov enabled on book3e machines
> KCOV_INSTRUMENT_tlb_nohash.o := n
> KCOV_INSTRUMENT_fsl_booke_mmu.o := n
> +KCOV_INSTRUMENT_slb.o := n
>
next prev parent reply other threads:[~2019-03-07 4:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-04 8:25 [PATCH] Disable kcov for slb routines Mahesh J Salgaonkar
2019-03-05 3:31 ` Andrew Donnellan
2019-03-07 4:37 ` Satheesh Rajendran [this message]
2019-03-14 11:43 ` Michael Ellerman
2019-03-15 5:01 ` Mahesh Jagannath Salgaonkar
2019-03-20 12:51 ` Michael Ellerman
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