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Thu, 02 Jan 2025 19:54:10 -0800 (PST) Message-ID: <77c202bf-e0a3-45e7-bf8d-eef7903e3c64@bytedance.com> Date: Fri, 3 Jan 2025 11:53:56 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 04/15] mm: pgtable: add statistics for P4D level page table Content-Language: en-US To: Kevin Brodsky Cc: peterz@infradead.org, agordeev@linux.ibm.com, palmer@dabbelt.com, tglx@linutronix.de, david@redhat.com, jannh@google.com, hughd@google.com, yuzhao@google.com, willy@infradead.org, muchun.song@linux.dev, vbabka@kernel.org, lorenzo.stoakes@oracle.com, akpm@linux-foundation.org, rientjes@google.com, vishal.moola@gmail.com, arnd@arndb.de, will@kernel.org, aneesh.kumar@kernel.org, npiggin@gmail.com, dave.hansen@linux.intel.com, rppt@kernel.org, ryan.roberts@arm.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-arch@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-um@lists.infradead.org References: <2fa644e37ab917292f5c342e40fa805aa91afbbd.1735549103.git.zhengqi.arch@bytedance.com> <237a3bf6-c24f-4feb-8d3d-bb3beb2fd18e@arm.com> From: Qi Zheng In-Reply-To: <237a3bf6-c24f-4feb-8d3d-bb3beb2fd18e@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2025/1/3 00:53, Kevin Brodsky wrote: > On 30/12/2024 10:07, Qi Zheng wrote: >> diff --git a/arch/riscv/include/asm/pgalloc.h b/arch/riscv/include/asm/pgalloc.h >> index 551d614d3369c..3466fbe2e508d 100644 >> --- a/arch/riscv/include/asm/pgalloc.h >> +++ b/arch/riscv/include/asm/pgalloc.h >> @@ -108,8 +108,12 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud, >> static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d, >> unsigned long addr) >> { >> - if (pgtable_l5_enabled) >> + if (pgtable_l5_enabled) { >> + struct ptdesc *ptdesc = virt_to_ptdesc(p4d); >> + >> + pagetable_p4d_dtor(ptdesc); >> riscv_tlb_remove_ptdesc(tlb, virt_to_ptdesc(p4d)); > > Nit: could use the new ptdesc variable here instead of calling > virt_to_ptdesc(). Right, but we will remove pagetable_p4d_dtor() in patch #10, so this may not matter. Thanks! > > - Kevin