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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 C80B6C11D04 for ; Thu, 20 Feb 2020 12:27:47 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 9CF6B24673 for ; Thu, 20 Feb 2020 12:27:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=shipmail.org header.i=@shipmail.org header.b="EsL3zqsY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9CF6B24673 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=shipmail.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 785FE6E200; Thu, 20 Feb 2020 12:27:44 +0000 (UTC) Received: from pio-pvt-msa3.bahnhof.se (pio-pvt-msa3.bahnhof.se [79.136.2.42]) by gabe.freedesktop.org (Postfix) with ESMTPS id DAD6A6E200 for ; Thu, 20 Feb 2020 12:27:41 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by pio-pvt-msa3.bahnhof.se (Postfix) with ESMTP id 24DBF3F401; Thu, 20 Feb 2020 13:27:40 +0100 (CET) Authentication-Results: pio-pvt-msa3.bahnhof.se; dkim=pass (1024-bit key; unprotected) header.d=shipmail.org header.i=@shipmail.org header.b=EsL3zqsY; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at bahnhof.se Received: from pio-pvt-msa3.bahnhof.se ([127.0.0.1]) by localhost (pio-pvt-msa3.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AKgQQuC0Bh89; Thu, 20 Feb 2020 13:27:39 +0100 (CET) Received: from mail1.shipmail.org (h-205-35.A357.priv.bahnhof.se [155.4.205.35]) (Authenticated sender: mb878879) by pio-pvt-msa3.bahnhof.se (Postfix) with ESMTPA id E9AAE3F32A; Thu, 20 Feb 2020 13:27:34 +0100 (CET) Received: from localhost.localdomain.localdomain (h-205-35.A357.priv.bahnhof.se [155.4.205.35]) by mail1.shipmail.org (Postfix) with ESMTPSA id 861AE360476; Thu, 20 Feb 2020 13:27:34 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=shipmail.org; s=mail; t=1582201654; bh=I4dTEA5C4I3JwRk7pTpNlz2a8W6Im6M0WNPnyIsfSGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EsL3zqsYTubFEI86dJ/b9vOJiUfulEgyqRrN7suvJPPKGOO7l03gsDYKOTqLT3Jnw TIk6LJ5EznLO0Ily4N7ly1LqC3qvl5uGemdHNBL5klRshKdhwRVvEgw+CYb/qgT1ui R5xSQRigEHw2c/bTIIuxoLLi/90XBMEpR1TW/T6c= From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m=20=28VMware=29?= To: linux-mm@kvack.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/9] mm: Split huge pages on write-notify or COW Date: Thu, 20 Feb 2020 13:27:13 +0100 Message-Id: <20200220122719.4302-4-thomas_os@shipmail.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200220122719.4302-1-thomas_os@shipmail.org> References: <20200220122719.4302-1-thomas_os@shipmail.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Hellstrom , Michal Hocko , pv-drivers@vmware.com, Dan Williams , Ralph Campbell , "Matthew Wilcox \(Oracle\)" , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , linux-graphics-maintainer@vmware.com, Andrew Morton , =?UTF-8?q?Christian=20K=C3=B6nig?= , "Kirill A. Shutemov" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" RnJvbTogVGhvbWFzIEhlbGxzdHJvbSA8dGhlbGxzdHJvbUB2bXdhcmUuY29tPgoKV2UgY3VycmVu dGx5IG9ubHkgZG8gQ09XIGFuZCB3cml0ZS1ub3RpZnkgb24gdGhlIFBURSBsZXZlbCwgc28gaWYg dGhlCmh1Z2VfZmF1bHQoKSBoYW5kbGVyIHJldHVybnMgVk1fRkFVTFRfRkFMTEJBQ0sgb24gd3Ag ZmF1bHRzLApzcGxpdCB0aGUgaHVnZSBwYWdlcyBhbmQgcGFnZS10YWJsZSBlbnRyaWVzLiBBbHNv IGRvIHRoaXMgZm9yIGh1Z2UgUFVEcwppZiB0aGVyZSBpcyBubyBodWdlX2ZhdWx0KCkgaGFuZGxl ciBhbmQgdGhlIHZtYSBpcyBub3QgYW5vbnltb3VzLCBzaW1pbGFyCnRvIGhvdyBpdCdzIGRvbmUg Zm9yIFBNRHMuCgpOb3RlIHRoYXQgZnMvZGF4LmMgZG9lcyB0aGUgc3BsaXR0aW5nIGluIHRoZSBo dWdlX2ZhdWx0KCkgaGFuZGxlciwgYnV0IGFzCmh1Z2VfZmF1bHQoKSBpcyBpbXBsZW1lbnRlZCBi eSBtb2R1bGVzIHdlIG5lZWQgdG8gY29uc2lkZXIgd2hldGhlciB0bwpleHBvcnQgdGhlIHNwbGl0 dGluZyBmdW5jdGlvbnMgZm9yIHVzZSBpbiB0aGUgbW9kdWxlcyBvciB3aGV0aGVyIHRvIHRyeQp0 byBrZWVwIGNhbGxzIGluIHRoZSBjb3JlLiBPcHQgZm9yIHRoZSBsYXR0ZXIuIEEgZm9sbG93LXVw IHBhdGNoIGNhbgpyZW1vdmUgdGhlIGRheC5jIHNwbGl0X2h1Z2VfcG1kKCkgaWYgbmVlZGVkLgoK Q2M6IEFuZHJldyBNb3J0b24gPGFrcG1AbGludXgtZm91bmRhdGlvbi5vcmc+CkNjOiBNaWNoYWwg SG9ja28gPG1ob2Nrb0BzdXNlLmNvbT4KQ2M6ICJNYXR0aGV3IFdpbGNveCAoT3JhY2xlKSIgPHdp bGx5QGluZnJhZGVhZC5vcmc+CkNjOiAiS2lyaWxsIEEuIFNodXRlbW92IiA8a2lyaWxsLnNodXRl bW92QGxpbnV4LmludGVsLmNvbT4KQ2M6IFJhbHBoIENhbXBiZWxsIDxyY2FtcGJlbGxAbnZpZGlh LmNvbT4KQ2M6ICJKw6lyw7RtZSBHbGlzc2UiIDxqZ2xpc3NlQHJlZGhhdC5jb20+CkNjOiAiQ2hy aXN0aWFuIEvDtm5pZyIgPGNocmlzdGlhbi5rb2VuaWdAYW1kLmNvbT4KQ2M6IERhbiBXaWxsaWFt cyA8ZGFuLmoud2lsbGlhbXNAaW50ZWwuY29tPgpTaWduZWQtb2ZmLWJ5OiBUaG9tYXMgSGVsbHN0 cm9tIDx0aGVsbHN0cm9tQHZtd2FyZS5jb20+CkFja2VkLWJ5OiBDaHJpc3RpYW4gS8O2bmlnIDxj aHJpc3RpYW4ua29lbmlnQGFtZC5jb20+Ci0tLQogbW0vbWVtb3J5LmMgfCAyNyArKysrKysrKysr KysrKysrKysrLS0tLS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCAxOSBpbnNlcnRpb25zKCspLCA4IGRl bGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL21tL21lbW9yeS5jIGIvbW0vbWVtb3J5LmMKaW5kZXgg MTdhYWRjNzUxZTVjLi40YzQ5ZmU5NjNlNWMgMTAwNjQ0Ci0tLSBhL21tL21lbW9yeS5jCisrKyBi L21tL21lbW9yeS5jCkBAIC0zODgwLDExICszODgwLDE0IEBAIHN0YXRpYyBpbmxpbmUgdm1fZmF1 bHRfdCB3cF9odWdlX3BtZChzdHJ1Y3Qgdm1fZmF1bHQgKnZtZiwgcG1kX3Qgb3JpZ19wbWQpCiB7 CiAJaWYgKHZtYV9pc19hbm9ueW1vdXModm1mLT52bWEpKQogCQlyZXR1cm4gZG9faHVnZV9wbWRf d3BfcGFnZSh2bWYsIG9yaWdfcG1kKTsKLQlpZiAodm1mLT52bWEtPnZtX29wcy0+aHVnZV9mYXVs dCkKLQkJcmV0dXJuIHZtZi0+dm1hLT52bV9vcHMtPmh1Z2VfZmF1bHQodm1mLCBQRV9TSVpFX1BN RCk7CisJaWYgKHZtZi0+dm1hLT52bV9vcHMtPmh1Z2VfZmF1bHQpIHsKKwkJdm1fZmF1bHRfdCBy ZXQgPSB2bWYtPnZtYS0+dm1fb3BzLT5odWdlX2ZhdWx0KHZtZiwgUEVfU0laRV9QTUQpOwogCi0J LyogQ09XIGhhbmRsZWQgb24gcHRlIGxldmVsOiBzcGxpdCBwbWQgKi8KLQlWTV9CVUdfT05fVk1B KHZtZi0+dm1hLT52bV9mbGFncyAmIFZNX1NIQVJFRCwgdm1mLT52bWEpOworCQlpZiAoIShyZXQg JiBWTV9GQVVMVF9GQUxMQkFDSykpCisJCQlyZXR1cm4gcmV0OworCX0KKworCS8qIENPVyBvciB3 cml0ZS1ub3RpZnkgaGFuZGxlZCBvbiBwdGUgbGV2ZWw6IHNwbGl0IHBtZC4gKi8KIAlfX3NwbGl0 X2h1Z2VfcG1kKHZtZi0+dm1hLCB2bWYtPnBtZCwgdm1mLT5hZGRyZXNzLCBmYWxzZSwgTlVMTCk7 CiAKIAlyZXR1cm4gVk1fRkFVTFRfRkFMTEJBQ0s7CkBAIC0zODk3LDEyICszOTAwLDIwIEBAIHN0 YXRpYyBpbmxpbmUgYm9vbCB2bWFfaXNfYWNjZXNzaWJsZShzdHJ1Y3Qgdm1fYXJlYV9zdHJ1Y3Qg KnZtYSkKIAogc3RhdGljIHZtX2ZhdWx0X3QgY3JlYXRlX2h1Z2VfcHVkKHN0cnVjdCB2bV9mYXVs dCAqdm1mKQogewotI2lmZGVmIENPTkZJR19UUkFOU1BBUkVOVF9IVUdFUEFHRQorI2lmIGRlZmlu ZWQoQ09ORklHX1RSQU5TUEFSRU5UX0hVR0VQQUdFKSAmJgkJCVwKKwlkZWZpbmVkKENPTkZJR19I QVZFX0FSQ0hfVFJBTlNQQVJFTlRfSFVHRVBBR0VfUFVEKQogCS8qIE5vIHN1cHBvcnQgZm9yIGFu b255bW91cyB0cmFuc3BhcmVudCBQVUQgcGFnZXMgeWV0ICovCiAJaWYgKHZtYV9pc19hbm9ueW1v dXModm1mLT52bWEpKQotCQlyZXR1cm4gVk1fRkFVTFRfRkFMTEJBQ0s7Ci0JaWYgKHZtZi0+dm1h LT52bV9vcHMtPmh1Z2VfZmF1bHQpCi0JCXJldHVybiB2bWYtPnZtYS0+dm1fb3BzLT5odWdlX2Zh dWx0KHZtZiwgUEVfU0laRV9QVUQpOworCQlnb3RvIHNwbGl0OworCWlmICh2bWYtPnZtYS0+dm1f b3BzLT5odWdlX2ZhdWx0KSB7CisJCXZtX2ZhdWx0X3QgcmV0ID0gdm1mLT52bWEtPnZtX29wcy0+ aHVnZV9mYXVsdCh2bWYsIFBFX1NJWkVfUFVEKTsKKworCQlpZiAoIShyZXQgJiBWTV9GQVVMVF9G QUxMQkFDSykpCisJCQlyZXR1cm4gcmV0OworCX0KK3NwbGl0OgorCS8qIENPVyBvciB3cml0ZS1u b3RpZnkgbm90IGhhbmRsZWQgb24gUFVEIGxldmVsOiBzcGxpdCBwdWQuKi8KKwlfX3NwbGl0X2h1 Z2VfcHVkKHZtZi0+dm1hLCB2bWYtPnB1ZCwgdm1mLT5hZGRyZXNzKTsKICNlbmRpZiAvKiBDT05G SUdfVFJBTlNQQVJFTlRfSFVHRVBBR0UgKi8KIAlyZXR1cm4gVk1fRkFVTFRfRkFMTEJBQ0s7CiB9 Ci0tIAoyLjIxLjEKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9y ZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZl bAo=