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=-9.5 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,URIBL_BLOCKED,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 A4E25C3F2E0 for ; Wed, 4 Mar 2020 10:29:15 +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 7B7D224683 for ; Wed, 4 Mar 2020 10:29:15 +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="aYDMzrpo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7B7D224683 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 AA02F6EB17; Wed, 4 Mar 2020 10:29:00 +0000 (UTC) Received: from ste-pvt-msa1.bahnhof.se (ste-pvt-msa1.bahnhof.se [213.80.101.70]) by gabe.freedesktop.org (Postfix) with ESMTPS id 43CBA6EB0B for ; Wed, 4 Mar 2020 10:28:54 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by ste-pvt-msa1.bahnhof.se (Postfix) with ESMTP id 7ECCE3F888; Wed, 4 Mar 2020 11:28:52 +0100 (CET) Authentication-Results: ste-pvt-msa1.bahnhof.se; dkim=pass (1024-bit key; unprotected) header.d=shipmail.org header.i=@shipmail.org header.b=aYDMzrpo; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at bahnhof.se Received: from ste-pvt-msa1.bahnhof.se ([127.0.0.1]) by localhost (ste-pvt-msa1.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ovLp4pFr5_Wd; Wed, 4 Mar 2020 11:28:50 +0100 (CET) Received: from mail1.shipmail.org (h-205-35.A357.priv.bahnhof.se [155.4.205.35]) (Authenticated sender: mb878879) by ste-pvt-msa1.bahnhof.se (Postfix) with ESMTPA id 5CC693F885; Wed, 4 Mar 2020 11:28:48 +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 0E83136042F; Wed, 4 Mar 2020 11:28:48 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=shipmail.org; s=mail; t=1583317728; bh=eArF6ZjbQdomBzBVnzbUQcGFkrLPEvAM1NjLa5asgsg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aYDMzrpoD0nNuFdNRG3boslnkJ3rFO1pNqTFdJzDcSDijQcx1cRVU0nVBP0ouv6pf qjDLfCcx2elKnNFohIkbfgdg91M67xEBCYHm0kFTqUbhgnHkt+nSBzysBEAeaviqL/ qsn1A4dTA6TfXugmDW4/HvLd2yNQwBqXVShRK0kY= 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 v6 3/9] mm: Split huge pages on write-notify or COW Date: Wed, 4 Mar 2020 11:28:34 +0100 Message-Id: <20200304102840.2801-4-thomas_os@shipmail.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200304102840.2801-1-thomas_os@shipmail.org> References: <20200304102840.2801-1-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" RnJvbTogVGhvbWFzIEhlbGxzdHJvbSA8dGhlbGxzdHJvbUB2bXdhcmUuY29tPgoKVGhlIGZ1bmN0 aW9ucyB3cF9odWdlX3BtZCgpIGFuZCB3cF9odWdlX3B1ZCgpIGN1cnJlbnRseSByZWxpZXMgb24g dGhlCmh1Z2VfZmF1bHQoKSBjYWxsYmFjayB0byBzcGxpdCBodWdlIHBhZ2UgdGFibGUgZW50cmll cyBpZiBuZWVkZWQuCkhvd2V2ZXIgZm9yIG1vZHVsZSB1c2VycyB0aGF0IHJlcXVpcmVzIGV4cG9y dCBvZiB0aGUgc3BsaXRfaHVnZV94eHgoKQpmdW5jdGlvbmFsaXR5IHdoaWNoIG1heSBiZSB1bmRl c2lyZWQuIEluc3RlYWQgc3BsaXQgcHJlLWV4aXN0aW5nIGh1Z2UKcGFnZS10YWJsZSBlbnRyaWVz IG9uIFZNX0ZBVUxUX0ZBTExCQUNLIHJldHVybi4KCldlIGN1cnJlbnRseSBvbmx5IGRvIENPVyBh bmQgd3JpdGUtbm90aWZ5IG9uIHRoZSBQVEUgbGV2ZWwsIHNvIGlmIHRoZQpodWdlX2ZhdWx0KCkg aGFuZGxlciByZXR1cm5zIFZNX0ZBVUxUX0ZBTExCQUNLIG9uIHdwIGZhdWx0cywKc3BsaXQgdGhl IGh1Z2UgcGFnZXMgYW5kIHBhZ2UtdGFibGUgZW50cmllcy4gQWxzbyBkbyB0aGlzIGZvciBodWdl IFBVRHMKaWYgdGhlcmUgaXMgbm8gaHVnZV9mYXVsdCgpIGhhbmRsZXIgYW5kIHRoZSB2bWEgaXMg bm90IGFub255bW91cywgc2ltaWxhcgp0byBob3cgaXQncyBkb25lIGZvciBQTURzLgoKTm90ZSB0 aGF0IGZzL2RheC5jIHN0aWxsIGRvZXMgdGhlIHNwbGl0dGluZyBpbiB0aGUgaHVnZV9mYXVsdCgp IGhhbmRsZXIsIGJ1dCBhcwpodWdlX2ZhdWx0KCkgQSBmb2xsb3ctdXAgcGF0Y2ggY2FuIHJlbW92 ZSB0aGUgZGF4LmMgc3BsaXRfaHVnZV9wbWQoKSBpZiBuZWVkZWQuCgpDYzogQW5kcmV3IE1vcnRv biA8YWtwbUBsaW51eC1mb3VuZGF0aW9uLm9yZz4KQ2M6IE1pY2hhbCBIb2NrbyA8bWhvY2tvQHN1 c2UuY29tPgpDYzogIk1hdHRoZXcgV2lsY294IChPcmFjbGUpIiA8d2lsbHlAaW5mcmFkZWFkLm9y Zz4KQ2M6ICJLaXJpbGwgQS4gU2h1dGVtb3YiIDxraXJpbGwuc2h1dGVtb3ZAbGludXguaW50ZWwu Y29tPgpDYzogUmFscGggQ2FtcGJlbGwgPHJjYW1wYmVsbEBudmlkaWEuY29tPgpDYzogIkrDqXLD tG1lIEdsaXNzZSIgPGpnbGlzc2VAcmVkaGF0LmNvbT4KQ2M6ICJDaHJpc3RpYW4gS8O2bmlnIiA8 Y2hyaXN0aWFuLmtvZW5pZ0BhbWQuY29tPgpDYzogRGFuIFdpbGxpYW1zIDxkYW4uai53aWxsaWFt c0BpbnRlbC5jb20+ClNpZ25lZC1vZmYtYnk6IFRob21hcyBIZWxsc3Ryb20gPHRoZWxsc3Ryb21A dm13YXJlLmNvbT4KQWNrZWQtYnk6IENocmlzdGlhbiBLw7ZuaWcgPGNocmlzdGlhbi5rb2VuaWdA YW1kLmNvbT4KLS0tCiBtbS9tZW1vcnkuYyB8IDI3ICsrKysrKysrKysrKysrKysrKystLS0tLS0t LQogMSBmaWxlIGNoYW5nZWQsIDE5IGluc2VydGlvbnMoKyksIDggZGVsZXRpb25zKC0pCgpkaWZm IC0tZ2l0IGEvbW0vbWVtb3J5LmMgYi9tbS9tZW1vcnkuYwppbmRleCAwYmNjYzYyMmU0ODIuLjFl M2ZjMTk4ODc5MCAxMDA2NDQKLS0tIGEvbW0vbWVtb3J5LmMKKysrIGIvbW0vbWVtb3J5LmMKQEAg LTM5MzIsMTEgKzM5MzIsMTQgQEAgc3RhdGljIGlubGluZSB2bV9mYXVsdF90IHdwX2h1Z2VfcG1k KHN0cnVjdCB2bV9mYXVsdCAqdm1mLCBwbWRfdCBvcmlnX3BtZCkKIHsKIAlpZiAodm1hX2lzX2Fu b255bW91cyh2bWYtPnZtYSkpCiAJCXJldHVybiBkb19odWdlX3BtZF93cF9wYWdlKHZtZiwgb3Jp Z19wbWQpOwotCWlmICh2bWYtPnZtYS0+dm1fb3BzLT5odWdlX2ZhdWx0KQotCQlyZXR1cm4gdm1m LT52bWEtPnZtX29wcy0+aHVnZV9mYXVsdCh2bWYsIFBFX1NJWkVfUE1EKTsKKwlpZiAodm1mLT52 bWEtPnZtX29wcy0+aHVnZV9mYXVsdCkgeworCQl2bV9mYXVsdF90IHJldCA9IHZtZi0+dm1hLT52 bV9vcHMtPmh1Z2VfZmF1bHQodm1mLCBQRV9TSVpFX1BNRCk7CiAKLQkvKiBDT1cgaGFuZGxlZCBv biBwdGUgbGV2ZWw6IHNwbGl0IHBtZCAqLwotCVZNX0JVR19PTl9WTUEodm1mLT52bWEtPnZtX2Zs YWdzICYgVk1fU0hBUkVELCB2bWYtPnZtYSk7CisJCWlmICghKHJldCAmIFZNX0ZBVUxUX0ZBTExC QUNLKSkKKwkJCXJldHVybiByZXQ7CisJfQorCisJLyogQ09XIG9yIHdyaXRlLW5vdGlmeSBoYW5k bGVkIG9uIHB0ZSBsZXZlbDogc3BsaXQgcG1kLiAqLwogCV9fc3BsaXRfaHVnZV9wbWQodm1mLT52 bWEsIHZtZi0+cG1kLCB2bWYtPmFkZHJlc3MsIGZhbHNlLCBOVUxMKTsKIAogCXJldHVybiBWTV9G QVVMVF9GQUxMQkFDSzsKQEAgLTM5NDksMTIgKzM5NTIsMjAgQEAgc3RhdGljIGlubGluZSBib29s IHZtYV9pc19hY2Nlc3NpYmxlKHN0cnVjdCB2bV9hcmVhX3N0cnVjdCAqdm1hKQogCiBzdGF0aWMg dm1fZmF1bHRfdCBjcmVhdGVfaHVnZV9wdWQoc3RydWN0IHZtX2ZhdWx0ICp2bWYpCiB7Ci0jaWZk ZWYgQ09ORklHX1RSQU5TUEFSRU5UX0hVR0VQQUdFCisjaWYgZGVmaW5lZChDT05GSUdfVFJBTlNQ QVJFTlRfSFVHRVBBR0UpICYmCQkJXAorCWRlZmluZWQoQ09ORklHX0hBVkVfQVJDSF9UUkFOU1BB UkVOVF9IVUdFUEFHRV9QVUQpCiAJLyogTm8gc3VwcG9ydCBmb3IgYW5vbnltb3VzIHRyYW5zcGFy ZW50IFBVRCBwYWdlcyB5ZXQgKi8KIAlpZiAodm1hX2lzX2Fub255bW91cyh2bWYtPnZtYSkpCi0J CXJldHVybiBWTV9GQVVMVF9GQUxMQkFDSzsKLQlpZiAodm1mLT52bWEtPnZtX29wcy0+aHVnZV9m YXVsdCkKLQkJcmV0dXJuIHZtZi0+dm1hLT52bV9vcHMtPmh1Z2VfZmF1bHQodm1mLCBQRV9TSVpF X1BVRCk7CisJCWdvdG8gc3BsaXQ7CisJaWYgKHZtZi0+dm1hLT52bV9vcHMtPmh1Z2VfZmF1bHQp IHsKKwkJdm1fZmF1bHRfdCByZXQgPSB2bWYtPnZtYS0+dm1fb3BzLT5odWdlX2ZhdWx0KHZtZiwg UEVfU0laRV9QVUQpOworCisJCWlmICghKHJldCAmIFZNX0ZBVUxUX0ZBTExCQUNLKSkKKwkJCXJl dHVybiByZXQ7CisJfQorc3BsaXQ6CisJLyogQ09XIG9yIHdyaXRlLW5vdGlmeSBub3QgaGFuZGxl ZCBvbiBQVUQgbGV2ZWw6IHNwbGl0IHB1ZC4qLworCV9fc3BsaXRfaHVnZV9wdWQodm1mLT52bWEs IHZtZi0+cHVkLCB2bWYtPmFkZHJlc3MpOwogI2VuZGlmIC8qIENPTkZJR19UUkFOU1BBUkVOVF9I VUdFUEFHRSAqLwogCXJldHVybiBWTV9GQVVMVF9GQUxMQkFDSzsKIH0KLS0gCjIuMjEuMQoKX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1h aWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMu ZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJpLWRldmVsCg==