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[106.10.241.211]) by mx.google.com with ESMTPS id t69si20738302pfa.7.2019.04.05.23.15.46 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 05 Apr 2019 23:15:47 -0700 (PDT) Received-SPF: pass (google.com: domain of suryawanshipankaj@yahoo.com designates 106.10.241.211 as permitted sender) client-ip=106.10.241.211; Authentication-Results: mx.google.com; dkim=pass header.i=@yahoo.com header.s=s2048 header.b="G/bi6eHA"; spf=pass (google.com: domain of suryawanshipankaj@yahoo.com designates 106.10.241.211 as permitted sender) smtp.mailfrom=suryawanshipankaj@yahoo.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=yahoo.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1554531345; bh=BFJWdwxeFmvgdvdlDac5VDeh/vYmhJNFPdmYXnJUdGc=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:From:Subject; b=G/bi6eHA1q4GILAKl3kscHU/qhAAadl8CDyCXVCHV4nYqVM/TuPbdzd+gLlfGoxiapeau9PgvRT+hOElVvqjA25xsnwWdBI6z4d5RY9UML81AGynuGGCEadKb0BdXGgAKmXz1xq/kEcHLQXAjjCZY4cctEd6poK5ZUXcGssHS43WSTNm4ERjAR1Q96D1mwZ+Bn0wM33mp0m89GdqUGtCreCI3kj/7iisVqaYdlxj117VbQJxE/yyOdJaSKdLB3qWEETS2WZAl38gFjQ44FymOgy1qlo/pzZjC/Cm+GjSwoi9WBPGEHcIFrm17EA6KKiiT0AzYk4vx9tolaKT5HepxQ== X-YMail-OSG: YS8M6PMVM1kUGENqFeq55b0QSQTuukR8ig4hRptCRW1ii6dACBnilc2.m45.mGt Ps8RspU9wK1c6R7SOUqaTfLEZQs6HBB1VeeWPq5EzuMo4h3tRSMkbYrNer8fWMDWJs32dV.dImDp 3boaOZghdRI7numlmAeUTXqNOpzG8eENt1N_2RqBvwVyOlqMl.0BvviKNv9sC47adwAe0mjX.nsq FTg2AFOMHhfrRTN0_BY3G53tpsqTanIsSznKZC8GSqEW1o4_D1y8Wf_d2nNpjPRN2fb5dhQmPdoA A4eGeFJz9Ki3w2Jcmzl61DNpLl_o9IgH5vQxNcg_nnlaBFWlZNTojmKZwVkTmXgZ5IBj527lWNIB HnqJdkdgHXAn5sWGQOF_snFWgPCnD44qMCC6Q727HFJGIKR4_60qhdvLThF6Pv6_MB65dLUzCVM6 OEFjmPPJMx.SzQOZ9ZsE8yqW9eAnPe2cEuH_23Hpevj8HpG3_AZoVC9PU_XQjfOqgu7XqsOf8tL5 1bxD26iCl4COHRJRvaWFinfJIwbZfZ3yTjM95MIgEJugN7oGqeAkg5IJig3vPK7q03E29cL0SfpG sPOGIjfxFI13T0hxhoSDLt5PnZsDDpI_eAYwAhJkW7fksB9cKAsxel9hMBaPOJVmaa5b90ERbp0A L41Lc3qRabLFqQ.2YWr9fMQJJCOORI8PblEBz3TsFrF6plshW3HANTxBa_NyShzzmHbLjXudtLrr 3lar5SrVmZPlIESGSV21yxGyj0iay5aE329wTCXrRo21ylPkW2eP4oLawlrdn8oMnPgH4lfcnMAz 1tuK0Eejfdoh4VaSlvx.ITovkNCVthox66GwXCdRWr_laP8RtpEqa1FhERFCY4DKsnMuaMX1Mbdc 7FZX0zLWsVy2aZsw9ea1336nxq1WdRVamoC07fHZCMfhhPe9bTlihzMCDrBEOWTJ3mKR97oQz16y nycYsWg67Y317nNybMOIUu8ABexsuJi9cGpoUHN5OLpn4X9aYBxj19Iukc_ysqYa_UPu.b7nv2FN pND3yWEVQ23KZa8tJn6eipH7WlnKS5VyQOQPh8r7G1S_3Whc6y61pfzsjXPTABO4ljw7ZjmyW33n tyQ-- Received: from sonic.gate.mail.ne1.yahoo.com by sonic308.consmr.mail.sg3.yahoo.com with HTTP; Sat, 6 Apr 2019 06:15:45 +0000 Date: Sat, 6 Apr 2019 06:15:41 +0000 (UTC) From: Pankaj Suryawanshi Reply-To: Pankaj Suryawanshi To: =?UTF-8?Q?Valdis_Kl=C4=93tnieks?= Cc: LKML , "linux-mm@kvack.org" , "kernelnewbies@kernelnewbies.org" Message-ID: <1002302887.779027.1554531341350@mail.yahoo.com> In-Reply-To: <6977.1554499657@turing-police> References: <1536252828.16026118.1554461687939.ref@mail.yahoo.com> <1536252828.16026118.1554461687939@mail.yahoo.com> <6977.1554499657@turing-police> Subject: Re: How to calculate page address to PFN in user space. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Mailer: WebService/1.1.13212 YahooMailNeo Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36 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: On Saturday, 6 April 2019 2:57 AM, Valdis Kl=C4=93tnieks wrote: On Fri, 05 Apr 2019 10:54:47 -0000, Pankaj Suryawanshi said: > I have PFN of all processes in user space, how to calculate page address = to PFN. *All* user processes? That's going to be a lot of PFN's. What problem are= you trying to solve here? I am trying to solve problem with cma allocation failure, and try to find p= rocess who pinned the pages from cma reserved area. When cma allocation failed it dumped the information and it contains flags = and page address, before failing i have information/PFN of processes who aq= uires pages from cma area.=20 Now i want to find exact PFN of the dumped pages who is responsible for all= ocation failure. Note: I have got the pfn from /tools/vm/page-types.c in user space and i ha= ve start pfn of cma reserved area, so i filter the cma area pfn. (Hint - under what cases does the kernel care about the PFN of *any* user p= age?)