From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17EA6C43219 for ; Fri, 26 Apr 2019 04:52:06 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 12AAE206BF for ; Fri, 26 Apr 2019 04:52:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 12AAE206BF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44r1qk4qQZzDqfS for ; Fri, 26 Apr 2019 14:52:02 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=aneesh.kumar@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44r1p42HJwzDqcq for ; Fri, 26 Apr 2019 14:50:35 +1000 (AEST) Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x3Q4k6hk129921 for ; Fri, 26 Apr 2019 00:50:32 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2s3rjy5fja-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 26 Apr 2019 00:50:31 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 26 Apr 2019 05:50:26 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x3Q4oP5056295446 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 26 Apr 2019 04:50:25 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B747B42047; Fri, 26 Apr 2019 04:50:25 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 65A6E4203F; Fri, 26 Apr 2019 04:50:24 +0000 (GMT) Received: from skywalker.linux.ibm.com (unknown [9.193.89.254]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 26 Apr 2019 04:50:24 +0000 (GMT) X-Mailer: emacs 26.1 (via feedmail 11-beta-1 I) From: "Aneesh Kumar K.V" To: Christophe Leroy , npiggin@gmail.com, paulus@samba.org, mpe@ellerman.id.au Subject: Re: [PATCH v3 5/6] powerpc/mm: Reduce memory usage for mm_context_t for radix In-Reply-To: <76af2dbb-96bb-d5e6-fe65-a8ca87e2e268@c-s.fr> References: <20190417130351.3805-1-aneesh.kumar@linux.ibm.com> <20190417130351.3805-6-aneesh.kumar@linux.ibm.com> <76af2dbb-96bb-d5e6-fe65-a8ca87e2e268@c-s.fr> Date: Fri, 26 Apr 2019 10:20:19 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 x-cbid: 19042604-0008-0000-0000-000002E049EF X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19042604-0009-0000-0000-0000224CA5E9 Message-Id: <87imv1bcac.fsf@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-04-26_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904260034 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: linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Christophe Leroy writes: > Le 17/04/2019 =C3=A0 15:03, Aneesh Kumar K.V a =C3=A9crit=C2=A0: >> Currently, our mm_context_t on book3s64 include all hash specific >> context details like slice mask and subpage protection details. We >> can skip allocating these with radix translation. This will help us to s= ave >> 8K per mm_context with radix translation. >>=20 >> With the patch applied we have >>=20 >> sizeof(mm_context_t) =3D 136 >> sizeof(struct hash_mm_context) =3D 8288 >>=20 >> Signed-off-by: Aneesh Kumar K.V >> --- >> arch/powerpc/include/asm/book3s/64/mmu-hash.h | 33 ++++++++++++- >> arch/powerpc/include/asm/book3s/64/mmu.h | 49 +++++-------------- >> arch/powerpc/kernel/setup-common.c | 6 +++ >> arch/powerpc/mm/hash_utils_64.c | 4 +- >> arch/powerpc/mm/mmu_context_book3s64.c | 16 +++++- >> 5 files changed, 68 insertions(+), 40 deletions(-) >>=20 > > [...] > >> diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/se= tup-common.c >> index a07de8608484..21b1ce200b22 100644 >> --- a/arch/powerpc/kernel/setup-common.c >> +++ b/arch/powerpc/kernel/setup-common.c >> @@ -947,6 +947,12 @@ void __init setup_arch(char **cmdline_p) >> init_mm.end_data =3D (unsigned long) _edata; >> init_mm.brk =3D klimit; >>=20=20=20 >> +#ifdef CONFIG_PPC_MM_SLICES >> +#if defined(CONFIG_PPC_8xx) >> + init_mm.context.slb_addr_limit =3D DEFAULT_MAP_WINDOW; >> +#endif >> +#endif >> + > > In the previous patch, you moved the above into early_init_mmu(). Why=20 > bringing it back here ? > Rebase error. I see that you have sent a series to handle this. Thanks -aneesh