From nobody Sat Feb 7 19:41:45 2026 Received: from mail-dl1-f42.google.com (mail-dl1-f42.google.com [74.125.82.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C58F1FF61E for ; Tue, 27 Jan 2026 00:51:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769475117; cv=none; b=B0QC2DEcMsrLPe5kgxT8Of73wBzhh43AHIVY+R7Ib8RfinRL6n59J8L+NMnIUdpdGhdmIPJOc1ShwawkK9HRzERbM1/gLIoYPLoiGi+noPW7lWqNa0bkQ2WO7hzW9Kv0xayLgJqV7rCNw1DvV9uPHD1IWwRxO/V2X9aU6HPW4lg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769475117; c=relaxed/simple; bh=8TTFDV8bk8TsLTXxscvbBcSGQ/7z0a9G7GNdRp7Czvw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YgzAgyEPhSjpoU+BGAWxwqdXrBQC6gXiidwSAgenDDQ0SyHjDz1vnnosK97JiAPv9KTtgUOsqY73MywiuZeHM1dEMQChl+xDssxBc7sIsCBSSB0e98EX9G2FNlaqy0HrcfQmsbqBWGthMk32wyXgmoHfHnKxH2UaC3R7BIh2pY8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=hF1J/yuY; arc=none smtp.client-ip=74.125.82.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hF1J/yuY" Received: by mail-dl1-f42.google.com with SMTP id a92af1059eb24-12336f33098so4421638c88.0 for ; Mon, 26 Jan 2026 16:51:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1769475115; x=1770079915; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=T7a9RbCOrROWoP016V3+zUrjci7rmnK6fuyJb7ZGpEk=; b=hF1J/yuYS5xYP8B79W9ltfprjZDJeFOQ886MjQO8/zhSEEki+683B04fwlwJIO/if9 //0phX8moVDJuOAisk4US9PvpLgkc9dkgEhhHpMCrl1azICROFXUYTvlIU0e408VRlsY xCPVI1IXVJkxJR8ghys/TAYNB9016lFo+K7yzG3hNJ/HBQ8oi2d1tdd9aPgW9lbKgu5V Rvd5SnJBCPT2kXen2vfF8p6FS5nkM5QZQF2zoBblNfKTgbfPmidnVpLtxxSdJn06pLSs BU72kl42+Tcbcsg3nsKIQVgNTrxUqU+1K+HNx5owjwsLqS90yCgyNIy94TtJRXChspmi WJIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769475115; x=1770079915; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=T7a9RbCOrROWoP016V3+zUrjci7rmnK6fuyJb7ZGpEk=; b=MkN2Idm+G8aexDOUSvxMw3e9T7lR8oXmPNUTBYqKXml4d0nYU5pJIBUVqp+lCU/+Th GOFCH03ICfB2WSv8Uz5/19vibxTazzFkQ9eKacUWX9mDt6CSplVirgf3SS9E1D+0srkn cFHbXLSGPbngjKiGzbTrZcyCf37437kLDBIJd+JhAkzYa7MA0RZgbssetk9L1+/b4aDx nhTAlJAsfohSMx8llOz/zVYJTQzqfpe4kNDUYMtc5fUHBfRNcGKqIl3H8oSXAEdgsEmZ QUYw5lz45xOFXxqpc51VUuMIQnHUvVm8jch2jf4VVk5O9Jjj09f3ZvFVBJm0C/VHeDAL HEDA== X-Gm-Message-State: AOJu0YxT6FxHAKcIgwGJhIqV5T2EUQkPvKzVN+p7NxseWegsPy208Lqj usJnHuImoR0CuE60CbAXw0qxWWTXdCwuK+DsA5L4aVdHKxCjUTnvRyO/HA284A== X-Gm-Gg: AZuq6aKop26U91u6mzm1ZWvNRwkF8UTbIUEuevcTjlzBg4eOAbDP6ddN6OfwRZ7qxkX ALxJgugQhQqCGCCaaYj4eyor5zHNWmOPTRGewcCH0L2LAjdliisQ4PLxLHtRsFWiKaOtp73p2jS griiFyW7BtsRyFfh5SW14oO2NaskiPyb96Ui81YhmK1g08G7OHBtNjTbzNXi8XSBVRWixKS5soQ YcqlOiu9tK5k0tSJUZoXyuMfBrvECwNZ8wH99tn/QNwcL9ocSljooXnHOFb7RvSI90jagQEq6d3 t0BCsbtgaohdnfQsMkyfGw0xxyTPuwDOn20XxDIsgVgKUAH6dMQQqQNvs7ywRvNrpdbGJFOtxGT i3KAXIQOLpkRfLUyHhm6vCerH9N541GbmBkChAPdLfm9X/r/G2Lcv9ICnkL0dslREkfaKmBECUe qGfH+1TaSf8lcfqFBMmijV/HEOvmB5eCRhGwG4xKbV894= X-Received: by 2002:a05:7022:4194:b0:11b:a8e3:847d with SMTP id a92af1059eb24-124a005f2ebmr4510c88.10.1769475113324; Mon, 26 Jan 2026 16:51:53 -0800 (PST) Received: from fedora (c-67-164-59-41.hsd1.ca.comcast.net. [67.164.59.41]) by smtp.googlemail.com with ESMTPSA id a92af1059eb24-1247d91b9e1sm22185065c88.5.2026.01.26.16.51.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jan 2026 16:51:52 -0800 (PST) From: "Vishal Moola (Oracle)" To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, "Mike Rapoport (Microsoft)" Cc: akpm@linux-foundation.org, "Matthew Wilcox (Oracle)" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , "Vishal Moola (Oracle)" Subject: [PATCH 1/3] x86/mm/pat: Convert pte code to use ptdescs Date: Mon, 26 Jan 2026 16:51:38 -0800 Message-ID: <20260127005140.197847-2-vishal.moola@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260127005140.197847-1-vishal.moola@gmail.com> References: <20260127005140.197847-1-vishal.moola@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In order to separately allocate ptdescs from pages, we need all allocation and free sites to use the appropriate functions. Convert these pte allocation/free sites to use ptdescs. Signed-off-by: Vishal Moola (Oracle) --- arch/x86/mm/pat/set_memory.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index 6c6eb486f7a6..2dcb565d8f9b 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -1408,7 +1408,7 @@ static bool try_to_free_pte_page(pte_t *pte) if (!pte_none(pte[i])) return false; =20 - free_page((unsigned long)pte); + pagetable_free(virt_to_ptdesc((void *)pte)); return true; } =20 @@ -1537,9 +1537,10 @@ static void unmap_pud_range(p4d_t *p4d, unsigned lon= g start, unsigned long end) */ } =20 -static int alloc_pte_page(pmd_t *pmd) +static int alloc_pte_ptdesc(pmd_t *pmd) { - pte_t *pte =3D (pte_t *)get_zeroed_page(GFP_KERNEL); + pte_t *pte =3D (pte_t *) ptdesc_address( + pagetable_alloc(GFP_KERNEL | __GFP_ZERO, 0)); if (!pte) return -1; =20 @@ -1600,7 +1601,7 @@ static long populate_pmd(struct cpa_data *cpa, */ pmd =3D pmd_offset(pud, start); if (pmd_none(*pmd)) - if (alloc_pte_page(pmd)) + if (alloc_pte_ptdesc(pmd)) return -1; =20 populate_pte(cpa, start, pre_end, cur_pages, pmd, pgprot); @@ -1641,7 +1642,7 @@ static long populate_pmd(struct cpa_data *cpa, if (start < end) { pmd =3D pmd_offset(pud, start); if (pmd_none(*pmd)) - if (alloc_pte_page(pmd)) + if (alloc_pte_ptdesc(pmd)) return -1; =20 populate_pte(cpa, start, end, num_pages - cur_pages, --=20 2.52.0 From nobody Sat Feb 7 19:41:45 2026 Received: from mail-dl1-f48.google.com (mail-dl1-f48.google.com [74.125.82.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6EDAF204583 for ; Tue, 27 Jan 2026 00:51:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769475117; cv=none; b=tpwtmiG1/TCPJdNXBkmOyZKbsILZc+82z9ZPr7syZK6KLpxcjnEzikR2957sSDVb7B4rh0/bG+OTXW9xqlIKB9B3Zvz/nhoi3ewroeeeBRX/RO5WZFVmkZ1+Rx2uCUD5xlfvCeACUX/w9iu5HpCSNE5+uwA5uKn5cOnrsfytlDM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769475117; c=relaxed/simple; bh=1JZqruFjHmvGycAUsm99OzIsdg+qhN1qyG0LbFhFOkI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JUvh/2G//6FXGvLuYzX5xDqtBAsZ1wdLcxizrewpfOxFIfzyRe5qqweB/uMmxfKKt15lxS5cRcvLJRpWXQDlvUMFT2cW3CCXCrgtxqa8KFfoXdC1AQzZkMVEVWTB96liw+bTHBfrmE11OALBU5ivHSmmG+sH87BQUIOCtiAydzY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=frXxUEGz; arc=none smtp.client-ip=74.125.82.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="frXxUEGz" Received: by mail-dl1-f48.google.com with SMTP id a92af1059eb24-12460a7caa2so7295643c88.1 for ; Mon, 26 Jan 2026 16:51:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1769475115; x=1770079915; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=3dIALzjMANHxaf1mWstxpf4ZGCuW9se4Hc0gswmnGDw=; b=frXxUEGzyI+oPNOaFvFDMPFc7JXCqBXDZFlsKIEKsht76EC26MDvOj86OaUS4h2Jlt gS2ZQaZtq4eabsR+HtoPmJXzbotPaJqu5KeMSGzWmYkLJLMuyqDQXE1jk3+j6Maa4EfL 4tjbbBr0y4XHl/EuN2uelaRfszJIDkKbuK1BOtqN4hgf/qu4q3Hwf4quYiwpbuDhb8nQ v/EH9dNNuBnGmdGn2FqR82YYrk1i9kxdCPImZsQBRJfF4SabS36VfHSsF+S3q+W0oG2u LxEgRpNGqYv8qIPaZ4eP/XwkXwgIiZjh70RQKeE2HVp8VZwj5OIZV9UkI43bU7O/N0a1 orng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769475115; x=1770079915; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=3dIALzjMANHxaf1mWstxpf4ZGCuW9se4Hc0gswmnGDw=; b=vdrHeybuazid/LbHWb0WStGufonKJY6IVLcBVs+4WHV/6rOcVxLyrV38/d/Ls/AZvg T4EhcuB5bsX4L1A9CWaeE2DgRl9Y4jbLUZEriNb1/LRhS02NnemXmb3qqpIMWaq9ActR ixBnqp8rPdRkg5iBO3jalrXg1gof4vXYY48ZpcQ8DBFIrK6EEz3JkyWe9NjF52zkU4Uo GZLl7N0PwVUy/f82soQ3HUJ/XvRPEgWDMgYobFwFuEapVtlw4F0Zv9j53jWCbmXTMTvh a17kGOX+TrBpwtqRwx0bl6cgvSaBY5mlm+MODk3OGTOIfP8kdMU4jkK2RA/szOL79JJY dH7A== X-Gm-Message-State: AOJu0YyDI2R/4fwnrZWNuuFz6ueGZ6XsGNnFqcyA7RDdzRTZq+v4ScxE Z66oKEsNYpmAfFmO/1eJLOCtDgtp1moi03qBMDsO5gutdugAartdbuLaPE8pDQ== X-Gm-Gg: AZuq6aLJCnm5d18xfXCUkYHPmFKMpyyUi52fR2rJbLc5XJQAu2BPG3+ipwuld6xNSDu HWW5DJJuWvmudtRItAvYuLRGX5istxQg348+Xk4f9hlO+Pj9ausClWtA7QNJdegQlr7StBVavKs dfzfLlK7U/9Iw7QmWJQdDkBCPoetFKrZIbAG5pdCmbffiSZwBCcM5mnDqBMVoMdd7EKTWmfliqE rSW+qskZjFtsZ3cKar6/YLn2sMFuF0zjpP7mNePDDns5/wCciwEwNqKuLLmCAnY+lczf0Q5VopQ xIQpZAK345TJxmUEEV5LVYDsG+JeP2Wo6E2/yvwN+vQnD0GnwYkIHskbJqqnwQ12kgwoe5501ju h4iKx/VXWNCFdtPpGXfIs0vl/vcR3dD8GqW68jrJIt/S3CSzPTqV8U3cPeN+5D34qX3ZaQgRjdd 9trO7lpoLg3Fe+DNm1H+W+vfTQZKMORYgTgo8cVXK13UY= X-Received: by 2002:a05:7022:f102:b0:123:3103:b248 with SMTP id a92af1059eb24-124a005f5afmr4527c88.5.1769475114897; Mon, 26 Jan 2026 16:51:54 -0800 (PST) Received: from fedora (c-67-164-59-41.hsd1.ca.comcast.net. [67.164.59.41]) by smtp.googlemail.com with ESMTPSA id a92af1059eb24-1247d91b9e1sm22185065c88.5.2026.01.26.16.51.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jan 2026 16:51:54 -0800 (PST) From: "Vishal Moola (Oracle)" To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, "Mike Rapoport (Microsoft)" Cc: akpm@linux-foundation.org, "Matthew Wilcox (Oracle)" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , "Vishal Moola (Oracle)" Subject: [PATCH 2/3] x86/mm/pat: Convert pmd code to use ptdescs Date: Mon, 26 Jan 2026 16:51:39 -0800 Message-ID: <20260127005140.197847-3-vishal.moola@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260127005140.197847-1-vishal.moola@gmail.com> References: <20260127005140.197847-1-vishal.moola@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In order to separately allocate ptdescs from pages, we need all allocation and free sites to use the appropriate functions. Convert these pmd allocation/free sites to use ptdescs. Signed-off-by: Vishal Moola (Oracle) --- arch/x86/mm/pat/set_memory.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index 2dcb565d8f9b..ded1ba11c68f 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -1420,7 +1420,7 @@ static bool try_to_free_pmd_page(pmd_t *pmd) if (!pmd_none(pmd[i])) return false; =20 - free_page((unsigned long)pmd); + pagetable_free(virt_to_ptdesc((void *)pmd)); return true; } =20 @@ -1548,9 +1548,10 @@ static int alloc_pte_ptdesc(pmd_t *pmd) return 0; } =20 -static int alloc_pmd_page(pud_t *pud) +static int alloc_pmd_ptdesc(pud_t *pud) { - pmd_t *pmd =3D (pmd_t *)get_zeroed_page(GFP_KERNEL); + pmd_t *pmd =3D (pmd_t *) ptdesc_address( + pagetable_alloc(GFP_KERNEL | __GFP_ZERO, 0)); if (!pmd) return -1; =20 @@ -1623,7 +1624,7 @@ static long populate_pmd(struct cpa_data *cpa, * We cannot use a 1G page so allocate a PMD page if needed. */ if (pud_none(*pud)) - if (alloc_pmd_page(pud)) + if (alloc_pmd_ptdesc(pud)) return -1; =20 pmd =3D pmd_offset(pud, start); @@ -1679,7 +1680,7 @@ static int populate_pud(struct cpa_data *cpa, unsigne= d long start, p4d_t *p4d, * Need a PMD page? */ if (pud_none(*pud)) - if (alloc_pmd_page(pud)) + if (alloc_pmd_ptdesc(pud)) return -1; =20 cur_pages =3D populate_pmd(cpa, start, pre_end, cur_pages, @@ -1716,7 +1717,7 @@ static int populate_pud(struct cpa_data *cpa, unsigne= d long start, p4d_t *p4d, =20 pud =3D pud_offset(p4d, start); if (pud_none(*pud)) - if (alloc_pmd_page(pud)) + if (alloc_pmd_ptdesc(pud)) return -1; =20 tmp =3D populate_pmd(cpa, start, end, cpa->numpages - cur_pages, --=20 2.52.0 From nobody Sat Feb 7 19:41:45 2026 Received: from mail-dl1-f54.google.com (mail-dl1-f54.google.com [74.125.82.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 563C5218EB1 for ; Tue, 27 Jan 2026 00:51:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769475119; cv=none; b=NWo6Ib/ZuJozdS3CcezI7H2o7m4Y61CdJua4fFCe79Wn2fVGEiPgQMhVkHMW8s6ob/9NpPtC9UgB4TsOtCft9KYvsUsmiusJVP3nt3GCkOGtAlKdlU8/HtNreT3iTvnAzgbq2Yy114h178G3jsbCDH00i+9WFSvgbEA6ZduisR4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769475119; c=relaxed/simple; bh=fu5oQvkwFvh8wJtxQoBsV8OFa85np1+sh8P6gMJkuQA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OAJ0Cegr0wgLJ7+1OUl07pBHyTW/c9Td2FY8DK2m6rOCGu7w5dSPaUVaqn4T6gpf85e37GoAuA00JhWZAsb3FLQSlI14KHSxFBkHgtrhznGPPDxpHzEonHcY6FA3C5oun9HQv11SJ9mgDlcQ/l4Dy/Deajc4Ws9xNT3ozKntc9Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=bIPgXkG9; arc=none smtp.client-ip=74.125.82.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bIPgXkG9" Received: by mail-dl1-f54.google.com with SMTP id a92af1059eb24-1249b9f5703so1101492c88.0 for ; Mon, 26 Jan 2026 16:51:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1769475117; x=1770079917; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=6fGoqbwT4SjXoU4Ig+gNnQbra2LAJdAisEyMpKQBMxg=; b=bIPgXkG9Lh3xmYbJYcD8xUnc/KAaQ8BtvJ+sQtSDIFdMEBZ5cucvpf+WRsSZMN7lqo oo2O4KQpFsGUHuiWgh2XIcCF4BCBy7AVcu1yV9LQ2xUZrpCG/TKUO6GBP5U59BwQNNhp Gpt7OjKAtJkZlQ5HqbP1Bt4xgOGElwstpfiO5A1Q3KEri/QaWRdL1b+Hl763L4xuuQsa 4zm140n1z9rxa2PnUsu+D0QR5ssE0u5IE9B4ctBiDYgwJKyfqA/srCzAxggSWLTZWtvr TFXlvnAIPRek7elaC8lFD2rd1+ycWogKtIJh8kaSWhGdGH8SK1BL0fp2RLf0FNYsm1dk eISw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769475117; x=1770079917; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=6fGoqbwT4SjXoU4Ig+gNnQbra2LAJdAisEyMpKQBMxg=; b=f2/q/c6Vp2K1tmp5of24FISh7CCn5TtjveqmP7DitQ+HDQSnlp3aYNWmV5yBi2XDBx PhfF8wQ2DoJl2xyUXORCouFLFE67lGlezFM3eFT1nSiBN1AA8Iq9xIKii1F2zJ7nPJz/ /vKCZqdS0QrWj/7hGy/xkoERiwbYbUBB7deh4kEmYVXrFpH6erWEnTIk6qGGmcFHVE7j fZDDZGdqNLYUup7I2uSonjbZwYej5jhm+Re8Hsl+I6mUxp8iBTHplJ85RjFn7rJULm09 441agP+zQi2lvuwo4bwq4R7THz3ty8OuiDWedxcuxSzVTpVD6OkeziDzESwYJv8iQy// VnFw== X-Gm-Message-State: AOJu0YwlZkqmX8Uf2repm/+zAuV4928MEbLZuhh0+32KlGzaSTW9VbxQ eDyitPKDE6/nce8y2Ez793m1TYb5mxjg4tx5RbhAUlkLqcrfoEI9USedh7Nk2A== X-Gm-Gg: AZuq6aIXcFsjM3ChBFKGWscrSuEsI0oty+Dxq25VEmE3des9Bhog+cr+RZfb69oENSF bhAe0bYNizzikL+CqZrKa4czFtJesUgp8XFCRkFcqv71T/dgtdGOGvV0lkQj17urP9YD5Q4i+Yq AiavyZXwCb3zd8pNN5A+EWenDTZhIaAksNpg9biAKF6KCz2mlt71oSL5YoCb/7KRgkfFu1IMkKu m5Ls9IL505SGF0+wFvjNXnGVrQp6T7e+WaoBPih/VzamsNnYS1BOEdmtSaXYwOUWCyCuXq3wcou rn5IMKrscR2781/S4GsqQlv47hCsB6LRIYbpDmhDzfLlUY5msh/VK50jLAjzwBLe7jW53IhJ/T8 mFmzSl6fs2iueasttFdT02dpfGEjvLSGG7Zw/59UYma4kujCXHmTe1WUOqmVfr+682Tyauadbg9 SchN2Nk0pJXNn+FCiGMTxfo+poAy59OEMmcHO9NuIxgSw= X-Received: by 2002:a05:7022:43a4:b0:119:e569:f615 with SMTP id a92af1059eb24-124a006f022mr4482c88.14.1769475116704; Mon, 26 Jan 2026 16:51:56 -0800 (PST) Received: from fedora (c-67-164-59-41.hsd1.ca.comcast.net. [67.164.59.41]) by smtp.googlemail.com with ESMTPSA id a92af1059eb24-1247d91b9e1sm22185065c88.5.2026.01.26.16.51.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jan 2026 16:51:56 -0800 (PST) From: "Vishal Moola (Oracle)" To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, "Mike Rapoport (Microsoft)" Cc: akpm@linux-foundation.org, "Matthew Wilcox (Oracle)" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , "Vishal Moola (Oracle)" Subject: [PATCH 3/3] x86/mm/pat: Convert split_large_page() to use ptdescs Date: Mon, 26 Jan 2026 16:51:40 -0800 Message-ID: <20260127005140.197847-4-vishal.moola@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260127005140.197847-1-vishal.moola@gmail.com> References: <20260127005140.197847-1-vishal.moola@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In order to separately allocate ptdescs from pages, we need all allocation and free sites to use the appropriate functions. split_large_page() allocates a page to be used as a page table. This should be allocating a ptdesc, so convert it. Signed-off-by: Vishal Moola (Oracle) --- arch/x86/mm/pat/set_memory.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index ded1ba11c68f..246b9cd3d13d 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -1119,9 +1119,10 @@ static void split_set_pte(struct cpa_data *cpa, pte_= t *pte, unsigned long pfn, =20 static int __split_large_page(struct cpa_data *cpa, pte_t *kpte, unsigned long addres= s, - struct page *base) + struct ptdesc *ptdesc) { unsigned long lpaddr, lpinc, ref_pfn, pfn, pfninc =3D 1; + struct page *base =3D ptdesc_page(ptdesc); pte_t *pbase =3D (pte_t *)page_address(base); unsigned int i, level; pgprot_t ref_prot; @@ -1226,18 +1227,18 @@ __split_large_page(struct cpa_data *cpa, pte_t *kpt= e, unsigned long address, static int split_large_page(struct cpa_data *cpa, pte_t *kpte, unsigned long address) { - struct page *base; + struct ptdesc *ptdesc; =20 if (!debug_pagealloc_enabled()) spin_unlock(&cpa_lock); - base =3D alloc_pages(GFP_KERNEL, 0); + ptdesc =3D pagetable_alloc(GFP_KERNEL, 0); if (!debug_pagealloc_enabled()) spin_lock(&cpa_lock); - if (!base) + if (!ptdesc) return -ENOMEM; =20 - if (__split_large_page(cpa, kpte, address, base)) - __free_page(base); + if (__split_large_page(cpa, kpte, address, ptdesc)) + pagetable_free(ptdesc); =20 return 0; } --=20 2.52.0