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 63AB4C54EEB for ; Tue, 24 Mar 2020 20:11:51 +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 36BE8205ED for ; Tue, 24 Mar 2020 20:11:51 +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="SC907IVp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 36BE8205ED 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 915376E091; Tue, 24 Mar 2020 20:11:50 +0000 (UTC) Received: from ste-pvt-msa2.bahnhof.se (ste-pvt-msa2.bahnhof.se [213.80.101.71]) by gabe.freedesktop.org (Postfix) with ESMTPS id F20F56E081 for ; Tue, 24 Mar 2020 20:11:45 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by ste-pvt-msa2.bahnhof.se (Postfix) with ESMTP id 7A5613FA16; Tue, 24 Mar 2020 21:11:44 +0100 (CET) Authentication-Results: ste-pvt-msa2.bahnhof.se; dkim=pass (1024-bit key; unprotected) header.d=shipmail.org header.i=@shipmail.org header.b=SC907IVp; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at bahnhof.se Authentication-Results: ste-ftg-msa2.bahnhof.se (amavisd-new); dkim=pass (1024-bit key) header.d=shipmail.org Received: from ste-pvt-msa2.bahnhof.se ([127.0.0.1]) by localhost (ste-ftg-msa2.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8GgI8r0Fkpjd; Tue, 24 Mar 2020 21:11:43 +0100 (CET) Received: from mail1.shipmail.org (h-205-35.A357.priv.bahnhof.se [155.4.205.35]) (Authenticated sender: mb878879) by ste-pvt-msa2.bahnhof.se (Postfix) with ESMTPA id ACF303F5ED; Tue, 24 Mar 2020 21:11:43 +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 28798360351; Tue, 24 Mar 2020 21:11:40 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=shipmail.org; s=mail; t=1585080703; bh=dpnrdYg+H0t1m4eMarcwA1QLL/f8FZ9Qq9Ix538PXuA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SC907IVp8Ih7txXNRoxmDbRmnmzNGE0fRRIypFPsGOJSPm12JK3N2IqEWPayhwGnJ e6zRke7cKWG54m8riTTXhI3OgWCxV26plomj9PlTcdk0hd9Jb6UEzpefOrLHnf4Cg7 AqU7JTYiVe0dwkOtxghSe+jKlOUVHATOCYps6Yr4= 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 v7 3/9] mm: Split huge pages on write-notify or COW Date: Tue, 24 Mar 2020 21:11:17 +0100 Message-Id: <20200324201123.3118-4-thomas_os@shipmail.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200324201123.3118-1-thomas_os@shipmail.org> References: <20200324201123.3118-1-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: Ralph Campbell , Michal Hocko , pv-drivers@vmware.com, "Thomas Hellstrom \(VMware\)" , Dan Williams , "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" RnJvbTogIlRob21hcyBIZWxsc3Ryb20gKFZNd2FyZSkiIDx0aG9tYXNfb3NAc2hpcG1haWwub3Jn PgoKVGhlIGZ1bmN0aW9ucyB3cF9odWdlX3BtZCgpIGFuZCB3cF9odWdlX3B1ZCgpIGN1cnJlbnRs eSByZWxpZXMgb24gdGhlCmh1Z2VfZmF1bHQoKSBjYWxsYmFjayB0byBzcGxpdCBodWdlIHBhZ2Ug dGFibGUgZW50cmllcyBpZiBuZWVkZWQuCkhvd2V2ZXIgZm9yIG1vZHVsZSB1c2VycyB0aGF0IHJl cXVpcmVzIGV4cG9ydCBvZiB0aGUgc3BsaXRfaHVnZV94eHgoKQpmdW5jdGlvbmFsaXR5IHdoaWNo IG1heSBiZSB1bmRlc2lyZWQuIEluc3RlYWQgc3BsaXQgcHJlLWV4aXN0aW5nIGh1Z2UKcGFnZS10 YWJsZSBlbnRyaWVzIG9uIFZNX0ZBVUxUX0ZBTExCQUNLIHJldHVybi4KCldlIGN1cnJlbnRseSBv bmx5IGRvIENPVyBhbmQgd3JpdGUtbm90aWZ5IG9uIHRoZSBQVEUgbGV2ZWwsIHNvIGlmIHRoZQpo dWdlX2ZhdWx0KCkgaGFuZGxlciByZXR1cm5zIFZNX0ZBVUxUX0ZBTExCQUNLIG9uIHdwIGZhdWx0 cywKc3BsaXQgdGhlIGh1Z2UgcGFnZXMgYW5kIHBhZ2UtdGFibGUgZW50cmllcy4gQWxzbyBkbyB0 aGlzIGZvciBodWdlIFBVRHMKaWYgdGhlcmUgaXMgbm8gaHVnZV9mYXVsdCgpIGhhbmRsZXIgYW5k IHRoZSB2bWEgaXMgbm90IGFub255bW91cywgc2ltaWxhcgp0byBob3cgaXQncyBkb25lIGZvciBQ TURzLgoKTm90ZSB0aGF0IGZzL2RheC5jIHN0aWxsIGRvZXMgdGhlIHNwbGl0dGluZyBpbiB0aGUg aHVnZV9mYXVsdCgpIGhhbmRsZXIsCmJ1dCBhcyBodWdlX2ZhdWx0KCkgQSBmb2xsb3ctdXAgcGF0 Y2ggY2FuIHJlbW92ZSB0aGUgZGF4LmMgc3BsaXRfaHVnZV9wbWQoKQppZiBuZWVkZWQuCgpDYzog QW5kcmV3IE1vcnRvbiA8YWtwbUBsaW51eC1mb3VuZGF0aW9uLm9yZz4KQ2M6IE1pY2hhbCBIb2Nr byA8bWhvY2tvQHN1c2UuY29tPgpDYzogIk1hdHRoZXcgV2lsY294IChPcmFjbGUpIiA8d2lsbHlA aW5mcmFkZWFkLm9yZz4KQ2M6ICJLaXJpbGwgQS4gU2h1dGVtb3YiIDxraXJpbGwuc2h1dGVtb3ZA bGludXguaW50ZWwuY29tPgpDYzogUmFscGggQ2FtcGJlbGwgPHJjYW1wYmVsbEBudmlkaWEuY29t PgpDYzogIkrDqXLDtG1lIEdsaXNzZSIgPGpnbGlzc2VAcmVkaGF0LmNvbT4KQ2M6ICJDaHJpc3Rp YW4gS8O2bmlnIiA8Y2hyaXN0aWFuLmtvZW5pZ0BhbWQuY29tPgpDYzogRGFuIFdpbGxpYW1zIDxk YW4uai53aWxsaWFtc0BpbnRlbC5jb20+ClNpZ25lZC1vZmYtYnk6IFRob21hcyBIZWxsc3Ryb20g KFZNd2FyZSkgPHRob21hc19vc0BzaGlwbWFpbC5vcmc+CkFja2VkLWJ5OiBDaHJpc3RpYW4gS8O2 bmlnIDxjaHJpc3RpYW4ua29lbmlnQGFtZC5jb20+CkFja2VkLWJ5OiBBbmRyZXcgTW9ydG9uIDxh a3BtQGxpbnV4LWZvdW5kYXRpb24ub3JnPgotLS0KIG1tL21lbW9yeS5jIHwgMjcgKysrKysrKysr KysrKysrKysrKy0tLS0tLS0tCiAxIGZpbGUgY2hhbmdlZCwgMTkgaW5zZXJ0aW9ucygrKSwgOCBk ZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9tbS9tZW1vcnkuYyBiL21tL21lbW9yeS5jCmluZGV4 IGU4YmZkZjBkOWQxZC4uZWZhNTliMWIxMDljIDEwMDY0NAotLS0gYS9tbS9tZW1vcnkuYworKysg Yi9tbS9tZW1vcnkuYwpAQCAtMzk1MSwxMSArMzk1MSwxNCBAQCBzdGF0aWMgaW5saW5lIHZtX2Zh dWx0X3Qgd3BfaHVnZV9wbWQoc3RydWN0IHZtX2ZhdWx0ICp2bWYsIHBtZF90IG9yaWdfcG1kKQog ewogCWlmICh2bWFfaXNfYW5vbnltb3VzKHZtZi0+dm1hKSkKIAkJcmV0dXJuIGRvX2h1Z2VfcG1k X3dwX3BhZ2Uodm1mLCBvcmlnX3BtZCk7Ci0JaWYgKHZtZi0+dm1hLT52bV9vcHMtPmh1Z2VfZmF1 bHQpCi0JCXJldHVybiB2bWYtPnZtYS0+dm1fb3BzLT5odWdlX2ZhdWx0KHZtZiwgUEVfU0laRV9Q TUQpOworCWlmICh2bWYtPnZtYS0+dm1fb3BzLT5odWdlX2ZhdWx0KSB7CisJCXZtX2ZhdWx0X3Qg cmV0ID0gdm1mLT52bWEtPnZtX29wcy0+aHVnZV9mYXVsdCh2bWYsIFBFX1NJWkVfUE1EKTsKIAot CS8qIENPVyBoYW5kbGVkIG9uIHB0ZSBsZXZlbDogc3BsaXQgcG1kICovCi0JVk1fQlVHX09OX1ZN QSh2bWYtPnZtYS0+dm1fZmxhZ3MgJiBWTV9TSEFSRUQsIHZtZi0+dm1hKTsKKwkJaWYgKCEocmV0 ICYgVk1fRkFVTFRfRkFMTEJBQ0spKQorCQkJcmV0dXJuIHJldDsKKwl9CisKKwkvKiBDT1cgb3Ig d3JpdGUtbm90aWZ5IGhhbmRsZWQgb24gcHRlIGxldmVsOiBzcGxpdCBwbWQuICovCiAJX19zcGxp dF9odWdlX3BtZCh2bWYtPnZtYSwgdm1mLT5wbWQsIHZtZi0+YWRkcmVzcywgZmFsc2UsIE5VTEwp OwogCiAJcmV0dXJuIFZNX0ZBVUxUX0ZBTExCQUNLOwpAQCAtMzk2OCwxMiArMzk3MSwyMCBAQCBz dGF0aWMgaW5saW5lIGJvb2wgdm1hX2lzX2FjY2Vzc2libGUoc3RydWN0IHZtX2FyZWFfc3RydWN0 ICp2bWEpCiAKIHN0YXRpYyB2bV9mYXVsdF90IGNyZWF0ZV9odWdlX3B1ZChzdHJ1Y3Qgdm1fZmF1 bHQgKnZtZikKIHsKLSNpZmRlZiBDT05GSUdfVFJBTlNQQVJFTlRfSFVHRVBBR0UKKyNpZiBkZWZp bmVkKENPTkZJR19UUkFOU1BBUkVOVF9IVUdFUEFHRSkgJiYJCQlcCisJZGVmaW5lZChDT05GSUdf SEFWRV9BUkNIX1RSQU5TUEFSRU5UX0hVR0VQQUdFX1BVRCkKIAkvKiBObyBzdXBwb3J0IGZvciBh bm9ueW1vdXMgdHJhbnNwYXJlbnQgUFVEIHBhZ2VzIHlldCAqLwogCWlmICh2bWFfaXNfYW5vbnlt b3VzKHZtZi0+dm1hKSkKLQkJcmV0dXJuIFZNX0ZBVUxUX0ZBTExCQUNLOwotCWlmICh2bWYtPnZt YS0+dm1fb3BzLT5odWdlX2ZhdWx0KQotCQlyZXR1cm4gdm1mLT52bWEtPnZtX29wcy0+aHVnZV9m YXVsdCh2bWYsIFBFX1NJWkVfUFVEKTsKKwkJZ290byBzcGxpdDsKKwlpZiAodm1mLT52bWEtPnZt X29wcy0+aHVnZV9mYXVsdCkgeworCQl2bV9mYXVsdF90IHJldCA9IHZtZi0+dm1hLT52bV9vcHMt Pmh1Z2VfZmF1bHQodm1mLCBQRV9TSVpFX1BVRCk7CisKKwkJaWYgKCEocmV0ICYgVk1fRkFVTFRf RkFMTEJBQ0spKQorCQkJcmV0dXJuIHJldDsKKwl9CitzcGxpdDoKKwkvKiBDT1cgb3Igd3JpdGUt bm90aWZ5IG5vdCBoYW5kbGVkIG9uIFBVRCBsZXZlbDogc3BsaXQgcHVkLiovCisJX19zcGxpdF9o dWdlX3B1ZCh2bWYtPnZtYSwgdm1mLT5wdWQsIHZtZi0+YWRkcmVzcyk7CiAjZW5kaWYgLyogQ09O RklHX1RSQU5TUEFSRU5UX0hVR0VQQUdFICovCiAJcmV0dXJuIFZNX0ZBVUxUX0ZBTExCQUNLOwog fQotLSAKMi4yMS4xCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fXwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5v cmcKaHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2 ZWwK