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[209.85.160.46]) by smtp.gmail.com with ESMTPSA id u13-20020a056808150d00b003546fada8f6sm2160245oiw.12.2022.10.10.10.20.32 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Oct 2022 10:20:32 -0700 (PDT) Received: by mail-oa1-f46.google.com with SMTP id 586e51a60fabf-1326637be6eso13140793fac.13 for ; Mon, 10 Oct 2022 10:20:32 -0700 (PDT) X-Received: by 2002:a05:6870:c888:b0:12c:7f3b:d67d with SMTP id er8-20020a056870c88800b0012c7f3bd67dmr10619390oab.229.1665422431775; Mon, 10 Oct 2022 10:20:31 -0700 (PDT) MIME-Version: 1.0 References: <20221002002326.946620-1-ira.weiny@intel.com> <20221002002326.946620-3-ira.weiny@intel.com> <20221010074234.GA20788@lst.de> In-Reply-To: <20221010074234.GA20788@lst.de> From: Linus Torvalds Date: Mon, 10 Oct 2022 10:20:15 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 2/4] tee: Remove vmalloc page support To: Christoph Hellwig Cc: Sumit Garg , =?UTF-8?B?UGhpbCBDaGFuZyAo5by15LiW5YuzKQ==?= , "ira.weiny@intel.com" , Jens Wiklander , Andrew Morton , Al Viro , "Fabio M. De Francesco" , "op-tee@lists.trustedfirmware.org" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" Content-Type: text/plain; charset="UTF-8" ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1665422436; a=rsa-sha256; cv=none; b=0xirC57iUk9IVyG9eOQqPQ/6tZ//hOWwQedfAvsmnIZOTvUyjls+scXJyFOKhehTHjx/UH FshB1/zmu/5IdPal0/qPUZ/S+V5S21GGjbkW8c/aVCG9QV5ZMAthC9C61cqo3y7lxWXG4t YrcBuoDYuI7J/6SgOn789nPpGihT2W4= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=google header.b=BBkIy6D9; spf=pass (imf21.hostedemail.com: domain of torvalds@linuxfoundation.org designates 209.85.160.43 as permitted sender) smtp.mailfrom=torvalds@linuxfoundation.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1665422436; h=from:from:sender: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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=PkxAA/9uVoaYu8Fb5sQePdbAwJCyyv1sqzkKH/uTXFY=; b=QkkEpxWwkSpu5KBrYVz1ogdJostwuQJ5WyIXmiv23TPYRuNE57wezl75sAMqPzH4NGLpr0 hVgsH+YLljz/85Bt590WuNFcPKsaKp+slJV9UfxYImJuQg8DUcDRybh6JKZ89wadJlXeKf 9a2FEnF1MA2fipzLPiioO0sDJ+ZPdes= Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=google header.b=BBkIy6D9; spf=pass (imf21.hostedemail.com: domain of torvalds@linuxfoundation.org designates 209.85.160.43 as permitted sender) smtp.mailfrom=torvalds@linuxfoundation.org; dmarc=none X-Stat-Signature: sk1w4h9qsh6nen5bkhh1147zg1986dex X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: BA6C41C001A X-Rspam-User: X-HE-Tag: 1665422436-103987 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 Mon, Oct 10, 2022 at 12:42 AM Christoph Hellwig wrote: > > I suspect the best long term option would be to just pass an iov_iter.. Hmm. Yeah, that sounds like a workable model, and solves the problem JensW pointed out with my simplistic "just pass a page array" approach where you also need to keep track of how to release things. Linus