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Tue, 1 Sep 2020 08:12:37 +0000 (GMT) Received: from [9.85.87.174] (unknown [9.85.87.174]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 1 Sep 2020 08:12:36 +0000 (GMT) Subject: Re: [PATCH] powerpc/mm: Remove DEBUG_VM_PGTABLE support on ppc64 To: Christophe Leroy , linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au References: <20200901080245.67950-1-aneesh.kumar@linux.ibm.com> <4519baaa-cb95-6ebb-200f-4520badb56f6@csgroup.eu> From: "Aneesh Kumar K.V" Message-ID: <39467f79-d213-772d-9ed1-93afedc2fc7a@linux.ibm.com> Date: Tue, 1 Sep 2020 13:42:36 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <4519baaa-cb95-6ebb-200f-4520badb56f6@csgroup.eu> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-09-01_04:2020-09-01, 2020-09-01 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxlogscore=999 lowpriorityscore=0 priorityscore=1501 bulkscore=0 spamscore=0 mlxscore=0 malwarescore=0 phishscore=0 impostorscore=0 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009010065 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anshuman Khandual Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 9/1/20 1:40 PM, Christophe Leroy wrote: > > > Le 01/09/2020 à 10:02, Aneesh Kumar K.V a écrit : >> The test is broken w.r.t page table update rules and results in kernel >> crash as below. Disable the support untill we get the tests updated. >> >> >> Signed-off-by: Aneesh Kumar K.V > > Any Fixes: tag ? > >> --- >>   arch/powerpc/Kconfig | 1 - >>   1 file changed, 1 deletion(-) >> >> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >> index 65bed1fdeaad..787e829b6f25 100644 >> --- a/arch/powerpc/Kconfig >> +++ b/arch/powerpc/Kconfig >> @@ -116,7 +116,6 @@ config PPC >>       # >>       select ARCH_32BIT_OFF_T if PPC32 >>       select ARCH_HAS_DEBUG_VIRTUAL >> -    select ARCH_HAS_DEBUG_VM_PGTABLE > > > You say you remove support for ppc64 but you are removing it for both > PPC64 and PPC32. Should you replace the line by: Does it work on PPC32 with DEBUG_VM enabled? I was expecting it will be broken there too. > >     select ARCH_HAS_DEBUG_VM_PGTABLE if PPC32 > >>       select ARCH_HAS_DEVMEM_IS_ALLOWED >>       select ARCH_HAS_ELF_RANDOMIZE >>       select ARCH_HAS_FORTIFY_SOURCE >> > > What about Documentation/features/debug/debug-vm-pgtable/arch-support.txt ? > I am hoping we can enable the config once we resolve the test issues. may be in next merge window. -aneesh