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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C997C25B7A for ; Tue, 21 May 2024 10:18:02 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 06A926B0092; Tue, 21 May 2024 06:18:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 01A666B0095; Tue, 21 May 2024 06:18:01 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DD6576B0096; Tue, 21 May 2024 06:18:01 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id BBD4A6B0092 for ; Tue, 21 May 2024 06:18:01 -0400 (EDT) Received: from smtpin24.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 7020E1A10BF for ; Tue, 21 May 2024 10:18:01 +0000 (UTC) X-FDA: 82142002362.24.A358C12 Received: from mailout1.samsung.com (mailout1.samsung.com [203.254.224.24]) by imf06.hostedemail.com (Postfix) with ESMTP id 9CDAA18000A for ; Tue, 21 May 2024 10:17:58 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=samsung.com header.s=mail20170921 header.b=gJP93wTF; spf=pass (imf06.hostedemail.com: domain of jaewon31.kim@samsung.com designates 203.254.224.24 as permitted sender) smtp.mailfrom=jaewon31.kim@samsung.com; dmarc=pass (policy=none) header.from=samsung.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1716286679; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=xNtfwsLj+AXhnT99jVhXBY0LB5g4T+lW3lcoU9wKeIQ=; b=xRSzx4SvgM8oXDpUOm4BmUYnbXYkN8M7RuLPUFXJXjUmblMbrQ8UZbW2hNVlbmoSW5AHdT kWTAHFoSVw3Q5r0NY/VhdhX0P8DtW/GXGrFOjy2byTgsrc2BA1MwjkDsR3wCzi2Ki0tBvQ HYxhoREXI2t3s52cNwBcPZRh+rU7TMM= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1716286679; a=rsa-sha256; cv=none; b=zLJWcyKBnID6FErqFIvhv0hVKsywW+cDsooEFr0mbykwHxyEaxwVC8jgM77fQU3jNqISLM a6YUgWvDt5ebb+/ohoJZrnjG4ywL/eAsgJ1vyS0LEbTDodcJF2Xj+4IaAxW4hPLh8Ckant UhjnjqPkOeBehvhPJbrLky06fw1zRVE= ARC-Authentication-Results: i=1; imf06.hostedemail.com; dkim=pass header.d=samsung.com header.s=mail20170921 header.b=gJP93wTF; spf=pass (imf06.hostedemail.com: domain of jaewon31.kim@samsung.com designates 203.254.224.24 as permitted sender) smtp.mailfrom=jaewon31.kim@samsung.com; dmarc=pass (policy=none) header.from=samsung.com Received: from epcas1p4.samsung.com (unknown [182.195.41.48]) by mailout1.samsung.com (KnoxPortal) with ESMTP id 20240521101755epoutp0179a4d2fdbf8a176f58e5fde60aae4890~ReaNPpRIo0294502945epoutp01C for ; Tue, 21 May 2024 10:17:55 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.samsung.com 20240521101755epoutp0179a4d2fdbf8a176f58e5fde60aae4890~ReaNPpRIo0294502945epoutp01C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1716286675; bh=xNtfwsLj+AXhnT99jVhXBY0LB5g4T+lW3lcoU9wKeIQ=; h=Subject:Reply-To:From:To:CC:In-Reply-To:Date:References:From; b=gJP93wTFQKdJyt38z2Vk87Yi3LnQrQcgoWMnByvx/qrgY8o61OaH7dThz7D7rPV89 XKsL5+hNFYPeS5REZxA1C1ZcqCZrUiMTZSX/jUH+VoG5YIejwsZuB3J/EOdtzz/Rmo L14D+0wL9A+n9hDqrQA1/Wdn98yH9tXhZIYRVa1I= Received: from epsnrtp2.localdomain (unknown [182.195.42.163]) by epcas1p4.samsung.com (KnoxPortal) with ESMTP id 20240521101754epcas1p4faba0848f97da16868486c58b9039450~ReaMVjLtI0862408624epcas1p4q; Tue, 21 May 2024 10:17:54 +0000 (GMT) Received: from epsmges1p1.samsung.com (unknown [182.195.36.223]) by epsnrtp2.localdomain (Postfix) with ESMTP id 4Vk9Ny04Pzz4x9Py; Tue, 21 May 2024 10:17:54 +0000 (GMT) X-AuditID: b6c32a35-053ff700000025be-ab-664c74d14045 Received: from epcas1p2.samsung.com ( [182.195.41.46]) by epsmges1p1.samsung.com (Symantec Messaging Gateway) with SMTP id FA.1F.09662.1D47C466; Tue, 21 May 2024 19:17:53 +0900 (KST) Mime-Version: 1.0 Subject: RE:(2) [RESEND PATCH 00/10] memblock: introduce memsize showing reserved memory Reply-To: jaewon31.kim@samsung.com From: Jaewon Kim To: Mike Rapoport , Jaewon Kim CC: "vbabka@suse.cz" , "akpm@linux-foundation.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "jaewon31.kim@gmail.com" , "tkjos@google.com" X-Priority: 3 X-Content-Kind-Code: NORMAL In-Reply-To: X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <20240521101753epcms1p50443f6b88adea211dd9bbb417dd57cb1@epcms1p5> Date: Tue, 21 May 2024 19:17:53 +0900 X-CMS-MailID: 20240521101753epcms1p50443f6b88adea211dd9bbb417dd57cb1 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" CMS-TYPE: 101P X-CPGSPASS: Y X-CPGSPASS: Y X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprDJsWRmVeSWpSXmKPExsWy7bCmnu7FEp80g5u9xhZz1q9hs3h5SNOi e/NMRove96+YLC7vmsNmcW/Nf1aLI+u3M1m8n1xsMbuxj9GB02PnrLvsHgs2lXpsWtXJ5rHp 0yR2jxMzfrN49G1ZxehxZsERdo/Pm+QCOKKybTJSE1NSixRS85LzUzLz0m2VvIPjneNNzQwM dQ0tLcyVFPISc1NtlVx8AnTdMnOAjlNSKEvMKQUKBSQWFyvp29kU5ZeWpCpk5BeX2CqlFqTk FJgV6BUn5haX5qXr5aWWWBkaGBiZAhUmZGdsPbWYvWCNQcX5GTtZGxh/6nUxcnJICJhIrGzu Y+1i5OIQEtjBKHH530a2LkYODl4BQYm/O4RBaoQFoiQuzD7FBmILCShJnP1xhR0irivR1L2a BcRmE9CWeL9gEitIq4iAl8Sdtx4gI5kFVjFJ9Ld3M0Ls4pWY0f6UBcKWlti+fCtYnFNAS+Lk 3VZmiLioxM3Vb9lh7PfH5kP1iki03jsLVSMo8eDnbkaYOX+OP2eDsIsllnU+YIKwayRWnFsF FTeXaHi7EszmFfCVmPLwOtgcFgFViZZjZ6HqXSR+nd8FtpcZ6JdlC18zg/zCLKApsX6XPkSY T+Ld1x5WmFcaNv5mx8beMe8J1Eg1iZZnX6HqZST+/nsGZXtI3L22m2UCo+IsREDPQrJ4FsLi BYzMqxjFUguKc9NTiw0LDOFxm5yfu4kRnEy1THcwTnz7Qe8QIxMH4yFGCQ5mJRHeTVs804R4 UxIrq1KL8uOLSnNSiw8xmgK9PJFZSjQ5H5jO80riDU0sDUzMjEwsjC2NzZTEec9cKUsVEkhP LEnNTk0tSC2C6WPi4JRqYLJdqVp/zKN2c7LKv6abt2/LqjtlHLObMOFLY4CKCbeee63cyisL p31bmrQm8K2X9751csHBu+b6nrkRe1Jj7fxg89j23V/mRWtIBdyd8Gu78uNZgmwrzq0ujtq9 9LOkws+A39t6Mn9e3OeTV8NWXexwIlBzqfWNjJBF/GpZxgdZenUOLjgtObHkwvngNbOlTzeu /vpC/2PZ/p4weR/D05M3/jWTPPlMW+a90t03ndsnKx/WDBA7skTHwCtkuWV4g7XcJV+nCfed p1/fZ3ng8sKjWjviWd1kvm+7399spXq5v/bQ2+qlpy4qxTDorlCe+mmx2pz8dK96ZWcG/x19 pm3fbq206dyWmSfxz3nmsQtKLMUZiYZazEXFiQCB18uOLwQAAA== DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20240521024009epcas1p10ed9f9b929203183a29f79508e79bb76 References: <20240521023957.2587005-1-jaewon31.kim@samsung.com> <20240521025329epcms1p6ce11064c0f0608a0156d82fda7ef285c@epcms1p6> X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 9CDAA18000A X-Rspam-User: X-Stat-Signature: 898kb7sj3k3dujmssms5my5zszcummc5 X-HE-Tag: 1716286678-899072 X-HE-Meta: U2FsdGVkX1//GoORVK89h5ZMQr4fLIaNTA30U+cSppkTzrZM04L6CJnhZUpS27cpHELvZ+L1K+IG1i+7ZgSOId3cPva174Fh+IYGOWWzAS/UMulRfIjwKPGMMA6gKlMOFnR6m63yIoN+XhYbDdxzVsKboRCwUrup37PHb1JiWYugcDz5Ye4eDrK0vcRVogALc4PhCWiF8Os3RV2J6s2HlL5As5spD71F4A7ZEH+TKbrVjIjcoowfJDjL8sQvZRpb7Bo4X3biLhnBOEn+sts/5u+rP5gY7Xa1H6kBphVcW4X3jXjHQ7ifT/OaeQmfd+jJRK9+0/Yu/ZMP/m9qXfo17RMZgqd6AV9UWyg9gcBkw5IZFDzOowxVqEA7dDohK16uqS1Ib5BJnrj2hWCb4quRPK7fhEdeev3mzdydWkqEKlmqbpcSPf3McxGOVeNBmdnS5/vVWmWGi1rKHTJOkCwX9YgA92qM0O+B4mTukZVnshOFg6a8Wl36/HMGzu/3sFn/dH1scWyWTeytk3nsinzZ3JMtmiF4DCDmdrzsvSLr+WU3aT0cgYV/iDTw8PvVU2ETZDt8fzdUEIbpWkb7B0KhM957L4miqiUtnlfVjjAGBf+AeqRZpSrpM5fB/1XYaNQzt1lu7LxiaydTqEQUhdOQOeG1srnl8QyQsRsgTx91rK9VU6JgtArNguUvUSs0ZmedkY6RTI4tas8tq++xXWSDPVOuUr2RVNZbjT0UKWGFXG1FtoKnvWr/JDT5FeM/CtL3dWK82GXX5PiIdJGlBu7IUKst552bSHWaRjc9f1cn6wW2MDtlrzMaBYa0QkLBfJ7DcfyEp/XwCGM8AOlh2gbZgcYOVxvjTcvuftTJo4h022K4rfNvt7WnoYp85aEG0rHwxxnGyqGkzhLAqrg0XMAm34oKguNzZQTHHIz31PpYu4qgNXueBTeHQ/wmOZIrDuDdJ8UAnL0c3Fddi0yLZeq TCi/WzPN 9sI3Q43VYaW5dBMNcgCMBi1kuuRNIRPHInJQM9Zv/SzBgE7RbKC7YR0somj+2c4gAUayLQECZVVBLYGHo3zHP9MZp4bmfpPlNo2AXkYbfdrV/LRmnyUWGLYoABidRdI6F+Zfp+kmkjS+xLrXKE4QX1FzhBrOYkbdKN4IIPvZFJkYDlYZogy1utXVRK40gna3aHQAmLtjngQJlnUlK/P1xERmbG2+SyvU4O4Ybgk1f9a+3MSc= 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: List-Subscribe: List-Unsubscribe: >On Tue, May 21, 2024 at 11:53:29AM +0900, Jaewon Kim wrote: >> >--------- Original Message --------- >> >Sender : =EA=B9=80=EC=9E=AC=EC=9B=90=20Syst= em=20Performance=20Lab.(MX)/=EC=82=BC=EC=84=B1=EC=A0=84=EC=9E=90=0D=0A>>=20= >Date=20=20=20:=202024-05-21=2011:40=20(GMT+9)=0D=0A>>=20>Title=20=20:=20= =5BRESEND=20PATCH=2000/10=5D=20memblock:=20introduce=20memsize=20showing=20= reserved=20memory=0D=0A>>=20>?=0D=0A>>=20>Some=20of=20memory=20regions=20ca= n=20be=20reserved=20for=20a=20specific=20purpose.=20They=20are=0D=0A>>=20>u= sually=20defined=20through=20reserved-memory=20in=20device=20tree.=20If=20o= nly=20size=0D=0A>>=20>without=20address=20is=20specified=20in=20device=20tr= ee,=20the=20address=20of=20the=20region=0D=0A>>=20>will=20be=20determined= =20at=20boot=20time.=0D=0A>>=20>=0D=0A>>=20>We=20may=20find=20the=20address= =20of=20the=20memory=20regions=20through=20booting=20log,=20but=0D=0A>>=20>= it=20does=20not=20show=20all.=20And=20it=20could=20be=20hard=20to=20catch= =20the=20very=20beginning=0D=0A>>=20>log.=20The=20memblock_dump_all=20shows= =20all=20memblock=20status=20but=20it=20does=20not=0D=0A>>=20>show=20region= =20name=20and=20its=20information=20is=20difficult=20to=20summarize.=0D=0A>= >=20>=0D=0A>>=20>This=20patch=20introduce=20a=20debugfs=20node,=20memblock/= memsize,=20to=20see=20reserved=0D=0A>>=20>memory=20easily.=0D=0A>>=20>=0D= =0A>>=20>Here's=20an=20example=0D=0A>>=20>=0D=0A>>=20>=24=20cat=20debugfs/m= emblock/memsize=0D=0A>>=20>=0D=0A>>=20>0x0000000000000000-0x000000000000000= 0=200x02000000=20(?=20=2032768=20KB=20)?=20=20map=20reusable=20linux,cma=0D= =0A>>=20>0x0000000000000000-0x0000000000000000=200x01000000=20(?=20=2016384= =20KB=20)?=20=20map=20reusable=20vxxxxx=0D=0A>>=20>...=0D=0A>>=20>0x0000000= 000000000-0x0000000000000000=200x004e0000=20(?=20?=204992=20KB=20)=20nomap= =20unusable=20unknown=0D=0A>>=20>0x0000000000000000-0x0000000000000000=200x= 00400000=20(?=20?=204096=20KB=20)=20nomap=20unusable=20cxxxxx=0D=0A>>=20>0x= 0000000000000000-0x0000000000000000=200x00e00000=20(?=20=2014336=20KB=20)= =20nomap=20unusable=20gxxxxx=0D=0A>>=20>=0D=0A>>=20>Reserved?=20?=20:=20122= 3856=20KB=0D=0A>>=20>=20.kernel?=20?=20:?=20275208=20KB=0D=0A>>=20>?=20.tex= t?=20?=20=20:?=20=2016576=20KB=0D=0A>>=20>?=20.rwdata?=20=20:?=20?=201963= =20KB=0D=0A>>=20>?=20.rodata?=20=20:?=20=2011920=20KB=0D=0A>>=20>?=20.bss?= =20?=20?=20:?=20?=202450=20KB=0D=0A>>=20>?=20.memmap?=20=20:?=20186368=20KB= =0D=0A>>=20>?=20.etc?=20?=20?=20:?=20=2055933=20KB=0D=0A>>=20>=20.unusable?= =20:?=20948648=20KB=0D=0A>>=20>System?=20?=20?=20:=2011359056=20KB=0D=0A>>= =20>=20.common?=20?=20:=2010306384=20KB=0D=0A>>=20>=20.reusable?=20:=201052= 672=20KB=0D=0A>>=20>Total?=20?=20?=20=20:=2012582912=20KB=20(=2012288.00=20= MB=20)=0D=0A>>=20>=0D=0A>>=20>Jaewon=20Kim=20(10):=0D=0A>>=20>?=20memblock:= =20introduce=20memsize=20showing=20reserved=20memory=0D=0A>>=20>?=20membloc= k:=20detect=20hidden=20memory=20hole=20size=0D=0A>>=20>?=20memblock:=20hand= le=20overlapped=20reserved=20memory=20region=0D=0A>>=20>?=20memblock:=20tak= e=20a=20region=20intersecting=20an=20unknown=20region=0D=0A>>=20>?=20memblo= ck:=20track=20memblock=20changed=20at=20early=20param=0D=0A>>=20>?=20memblo= ck:=20recognize=20late=20freed=20size=20by=20checking=20PageReserved=0D=0A>= >=20>?=20memblock:=20track=20kernel=20size=20on=20memsize=0D=0A>>=20>?=20me= mblock:=20print=20memsize=20summary=20information=0D=0A>>=20>?=20memblock:= =20print=20kernel=20internal=20size=0D=0A>>=20>?=20memblock:=20support=20me= msize=20reusable=20to=20consider=20as=20reusable=0D=0A>>=20>=0D=0A>>=20>=20= drivers/of/fdt.c?=20?=20?=20?=20?=20?=20=20=7C?=2011=20+=0D=0A>>=20>=20driv= ers/of/of_reserved_mem.c=20=7C?=2012=20+-=0D=0A>>=20>=20include/linux/membl= ock.h?=20?=20=20=7C?=2029=20++=0D=0A>>=20>=20init/main.c?=20?=20?=20?=20?= =20?=20?=20?=20?=20=7C?=2013=20+-=0D=0A>>=20>=20kernel/dma/contiguous.c?=20= ?=20?=20=7C?=20=209=20+-=0D=0A>>=20>=20mm/Kconfig?=20?=20?=20?=20?=20?=20?= =20?=20?=20=20=7C?=2016=20++=0D=0A>>=20>=20mm/memblock.c?=20?=20?=20?=20?= =20?=20?=20?=20=7C=20502=20++++++++++++++++++++++++++++++++++-=0D=0A>>=20>= =20mm/mm_init.c?=20?=20?=20?=20?=20?=20?=20?=20=20=7C?=20=206=20+-=0D=0A>>= =20>=20mm/page_alloc.c?=20?=20?=20?=20?=20?=20?=20=7C?=2010=20+-=0D=0A>>=20= >=209=20files=20changed,=20597=20insertions(+),=2011=20deletions(-)=0D=0A>>= =20>=0D=0A>>=20>--=20=0D=0A>>=20>2.25.1=0D=0A>>=20=0D=0A>>=20Hello=20Mike= =20=0D=0A>>=20=0D=0A>>=20This=20is=20actually=20RESEND=20as=20it=20was=20in= troduced=202=20years=20ago.=0D=0A>>=20Please=20refer=20to=20https://lore.ke= rnel.org/linux-mm/YkQB6Ah603yPR3qf=40kernel.org/=23t=0D=0A>>=20=0D=0A>>=20>= =20But=20you=20never=20provided=20details=20about=20*why*=20you=20want=20th= is=20information=20exposed.=0D=0A>>=20=0D=0A>>=20For=20your=20question,=20I= 'd=20like=20to=20say=20;=0D=0A>>=20We=20can=20see=20the=20same=20format=20a= nd=20exact=20information=20between=20different=20version=20of=20kernel=20st= atus.=0D=0A>>=20=0D=0A>>=201)=20Internally=20we=20can=20check=20if=20the=20= reserved=20memory=20changes.=0D=0A>>=202)=20Externally=20we=20can=20communi= cate=20between=20chipset=20vendors=20and=20OEM,=20with=20a=20same=20format.= =0D=0A>=0D=0A>Why=20the=20existing=20debugfs=20interface=20is=20not=20suffi= cient?=0D=0A=0D=0Adebugfs/memblock/memory=20&=20debugfs/memblock/reserved= =20have=20changed=20its=20format=20but=20still=20does=20not=20show=20name,= =20reusable,=20kernel=20size.=0D=0AIf=20memory=20is=20reserved=20from=20mem= block,=20and=20did=20not=20freed=20back=20to=20memblock.=20Memblock=20does= =20not=20know=20even=20after=20the=20memory=20is=20freed=20to=20system.=0D= =0AI=20think=20a=20simple=20debug=20interface=20is=20needed=20to=20easily= =20communicate=20with=20others=20or=20compare=20different=20SW=20releases.= =0D=0A=0D=0A>=20=0D=0A>>=20This=20helps=20us=20to=20communitcate=20well,=20= to=20easily=20detect=20changes=20or=20just=20to=20see=20differences.=0D=0A>= >=20=0D=0A>>=20Jaewon=20Kim=0D=0A>>=20=0D=0A>=0D=0A>--=20=0D=0A>Sincerely= =20yours,=0D=0A>Mike.=0D=0A=0D=0A