From patchwork Wed Aug 12 06:33:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 11710323 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1F8AA13B1 for ; Wed, 12 Aug 2020 06:34:54 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D946820768 for ; Wed, 12 Aug 2020 06:34:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="IrdEkC7I" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D946820768 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=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 883978D000C; Wed, 12 Aug 2020 02:34:52 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 812F38D0001; Wed, 12 Aug 2020 02:34:52 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 639918D000C; Wed, 12 Aug 2020 02:34:52 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0121.hostedemail.com [216.40.44.121]) by kanga.kvack.org (Postfix) with ESMTP id 48B898D0001 for ; Wed, 12 Aug 2020 02:34:52 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 01899180AD80F for ; Wed, 12 Aug 2020 06:34:52 +0000 (UTC) X-FDA: 77140953624.24.cable25_5d04a8626fe9 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin24.hostedemail.com (Postfix) with ESMTP id CF1A31A4A0 for ; Wed, 12 Aug 2020 06:34:51 +0000 (UTC) X-Spam-Summary: 1,0,0,e5a98fa22c8fa620,d41d8cd98f00b204,aneesh.kumar@linux.ibm.com,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1311:1314:1345:1359:1431:1437:1515:1535:1541:1711:1730:1747:1777:1792:2393:2559:2562:2689:3138:3139:3140:3141:3142:3352:3867:3868:3870:3872:3874:4250:4321:5007:6119:6261:6653:8634:9592:10004:11026:11473:11658:11914:12043:12114:12296:12297:12438:12555:12895:13069:13255:13311:13357:13894:14096:14181:14384:14394:14721:21080:21451:21611:21627:30054:30070,0,RBL:148.163.156.1:@linux.ibm.com:.lbl8.mailshell.net-64.100.201.201 62.2.0.100;04yfriqs9hs5o8aw5bybjetrifye1oca5j4sra6zbgtyz7whodte3eg36brhus4.x7yqzr57rgus8djry5a8tw3tc8sy88kuoo1s6m87737ufehxdxa8gabk9pi3sdz.y-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: cable25_5d04a8626fe9 X-Filterd-Recvd-Size: 5011 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf02.hostedemail.com (Postfix) with ESMTP for ; Wed, 12 Aug 2020 06:34:51 +0000 (UTC) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 07C6WvIW167339; Wed, 12 Aug 2020 02:34:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=SQ4C72HHWlSHM+9+6/yaE6PBuXHCkFKzcrZXPOYeWpQ=; b=IrdEkC7Ix7I/2GkBN+MjfHdnhaClfw95ZoFPJjf1s8bTHpZo3gIXSF+zfvgYo6PJPUbW VO+M3ALIZIaNdPmZJ9G/Eu5+FfNtqFuomrXGpnhjtiBLpLrakWtOYRozLC56hL8hhogl njHVb8+M+R3+I7pAe4/1+AnopzjXf+6HGVnSJQAYhhCFtqn7ChBwzmmfTAKb467A7T99 TwYxBrvLA5zYWZdI8qk8eYs50Ae61HYkKVO4hmYZlDcSnkYUqBYcc40UYOzVk1o/GJPa C5UMfIKoIdoDejFrPoOS+NfHPWnt6OUpucEkGslMzFFltg+dBHROYin0AGkkDGD3q/Hr gw== Received: from ppma01dal.us.ibm.com (83.d6.3fa9.ip4.static.sl-reverse.com [169.63.214.131]) by mx0a-001b2d01.pphosted.com with ESMTP id 32utn8kqan-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Aug 2020 02:34:44 -0400 Received: from pps.filterd (ppma01dal.us.ibm.com [127.0.0.1]) by ppma01dal.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 07C6GHgT028013; Wed, 12 Aug 2020 06:34:44 GMT Received: from b03cxnp08026.gho.boulder.ibm.com (b03cxnp08026.gho.boulder.ibm.com [9.17.130.18]) by ppma01dal.us.ibm.com with ESMTP id 32skp9f6k9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Aug 2020 06:34:44 +0000 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 07C6YcRe41746698 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 12 Aug 2020 06:34:38 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B6763136053; Wed, 12 Aug 2020 06:34:42 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6B526136055; Wed, 12 Aug 2020 06:34:40 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.85.71.109]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 12 Aug 2020 06:34:40 +0000 (GMT) From: "Aneesh Kumar K.V" To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, Anshuman Khandual , "Aneesh Kumar K.V" Subject: [PATCH 09/16] debug_vm_pgtable/set_pud: Don't use set_pud_at to update an existing pud entry Date: Wed, 12 Aug 2020 12:03:51 +0530 Message-Id: <20200812063358.369514-9-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200812063358.369514-1-aneesh.kumar@linux.ibm.com> References: <20200812063358.369514-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-11_19:2020-08-11,2020-08-11 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 malwarescore=0 bulkscore=0 mlxscore=0 suspectscore=0 mlxlogscore=629 clxscore=1015 impostorscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008120047 X-Rspamd-Queue-Id: CF1A31A4A0 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: set_pud_at() should not be used to set a pte entry at locations that already holds a valid pte entry. Architectures like ppc64 don't do TLB invalidate in set_pud_at() and hence expect it to be used to set locations that are not a valid PTE. Signed-off-by: Aneesh Kumar K.V --- mm/debug_vm_pgtable.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index 60bf876081b8..644d28861ce9 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -278,9 +278,6 @@ static void __init pud_advanced_tests(struct mm_struct *mm, WARN_ON(pud_write(pud)); #ifndef __PAGETABLE_PMD_FOLDED - - pud = pud_mkhuge(pfn_pud(pfn, prot)); - set_pud_at(mm, vaddr, pudp, pud); pudp_huge_get_and_clear(mm, vaddr, pudp); pud = READ_ONCE(*pudp); WARN_ON(!pud_none(pud)); @@ -302,6 +299,11 @@ static void __init pud_advanced_tests(struct mm_struct *mm, pud = READ_ONCE(*pudp); WARN_ON(!(pud_write(pud) && pud_dirty(pud))); + pudp_huge_get_and_clear_full(vma, vaddr, pudp, 1); + pud = READ_ONCE(*pudp); + WARN_ON(!pud_none(pud)); + + pud = pud_mkhuge(pfn_pud(pfn, prot)); pud = pud_mkyoung(pud); set_pud_at(mm, vaddr, pudp, pud); pudp_test_and_clear_young(vma, vaddr, pudp);