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[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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 2945980012 X-Stat-Signature: cxigfwau9qm9xgrfzmr1nrfenp79zh81 X-Rspam-User: X-HE-Tag: 1769475115-810285 X-HE-Meta: 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 23Iuu89P 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 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: List-Subscribe: List-Unsubscribe: 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; - free_page((unsigned long)pmd); + pagetable_free(virt_to_ptdesc((void *)pmd)); return true; } @@ -1548,9 +1548,10 @@ static int alloc_pte_ptdesc(pmd_t *pmd) return 0; } -static int alloc_pmd_page(pud_t *pud) +static int alloc_pmd_ptdesc(pud_t *pud) { - pmd_t *pmd = (pmd_t *)get_zeroed_page(GFP_KERNEL); + pmd_t *pmd = (pmd_t *) ptdesc_address( + pagetable_alloc(GFP_KERNEL | __GFP_ZERO, 0)); if (!pmd) return -1; @@ -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; pmd = pmd_offset(pud, start); @@ -1679,7 +1680,7 @@ static int populate_pud(struct cpa_data *cpa, unsigned 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; cur_pages = populate_pmd(cpa, start, pre_end, cur_pages, @@ -1716,7 +1717,7 @@ static int populate_pud(struct cpa_data *cpa, unsigned long start, p4d_t *p4d, pud = pud_offset(p4d, start); if (pud_none(*pud)) - if (alloc_pmd_page(pud)) + if (alloc_pmd_ptdesc(pud)) return -1; tmp = populate_pmd(cpa, start, end, cpa->numpages - cur_pages, -- 2.52.0