From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A8E08283FEF for ; Wed, 17 Dec 2025 18:24:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765995889; cv=none; b=XIa7AcsTI3ARggMv+5u8TpIHdF6nHOXrd0E/U0b+FuaTNLOi2i32MkponvxOTt91n0jFcdQ8lQCXKuRH6IkmWqbCWBRui8DdunBnyvja3Rxw7jPMFdm98djWltY9zQ4/C3+XxTF5sbgCq5YSkBtTuNqBn6DZvNYsu7VcHLuY2e4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765995889; c=relaxed/simple; bh=ucZkwxPhXnwBcEAtUjIRlrg/F8nbGxxf+X/SPfJupsQ=; h=Date:To:From:Subject:Message-Id; b=ZV8X77XZxQpjcFj5Pw5LE18OF+jwhKhAxe/rnXy9Spv+w4pqAfMXFNTAfJnjcBoCTTcq7xOBzrpY7/L9F6K64ltN4hdx0BnBGO0GCMDp1zYbrv1a/jynKY3QSQIThSOBNMXt2//zMYaVu6jmKT8TKmAuR7WL26ZQzX0h8CUt5UQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=w9Xb+UvW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="w9Xb+UvW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 29508C4CEFB; Wed, 17 Dec 2025 18:24:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1765995889; bh=ucZkwxPhXnwBcEAtUjIRlrg/F8nbGxxf+X/SPfJupsQ=; h=Date:To:From:Subject:From; b=w9Xb+UvWpci1zo/57u8QKEln0zA3mkX4f70qavnM3NRkAsiLIzh0BZAqzuk2BAi07 SYC1EQZPX0Xg2ztWtn7xl2JfkO9mQeTkGeEUnTDhp8qiUXPipdhVkk0wZDbnTLTbn7 4VuIKCdMZbAPGj9nuJywCL8AQl62Y2V8LjGFKdDU= Date: Wed, 17 Dec 2025 10:24:48 -0800 To: mm-commits@vger.kernel.org,will@kernel.org,tsbogend@alpha.franken.de,richard@nod.at,richard.henderson@linaro.org,peterz@infradead.org,npiggin@gmail.com,mattst88@gmail.com,linmag7@gmail.com,kernel@xen0n.name,johannes@sipsolutions.net,James.Bottomley@HansenPartnership.com,ioworker0@gmail.com,dev.jain@arm.com,deller@gmx.de,david@kernel.org,chenhuacai@kernel.org,anton.ivanov@cambridgegreys.com,aneesh.kumar@kernel.org,zhengqi.arch@bytedance.com,akpm@linux-foundation.org From: Andrew Morton Subject: + loongarch-mm-enable-mmu_gather_rcu_table_free.patch added to mm-new branch Message-Id: <20251217182449.29508C4CEFB@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: LoongArch: mm: enable MMU_GATHER_RCU_TABLE_FREE has been added to the -mm mm-new branch. Its filename is loongarch-mm-enable-mmu_gather_rcu_table_free.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/loongarch-mm-enable-mmu_gather_rcu_table_free.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Qi Zheng Subject: LoongArch: mm: enable MMU_GATHER_RCU_TABLE_FREE Date: Wed, 17 Dec 2025 17:45:44 +0800 On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of empty PTE page table pages (such as 100GB+). To resolve this problem, first enable MMU_GATHER_RCU_TABLE_FREE to prepare for enabling the PT_RECLAIM feature, which resolves this problem. Link: https://lkml.kernel.org/r/dae0a0b490e912273a62a49be9d92f470fbcaf04.1765963770.git.zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng Cc: Huacai Chen Cc: WANG Xuerui Cc: "Aneesh Kumar K.V" Cc: Anton Ivanov Cc: David Hildenbrand (Red Hat) Cc: Dev Jain Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: Johannes Berg Cc: Lance Yang Cc: Magnus Lindholm Cc: Matt Turner Cc: Nicholas Piggin Cc: Peter Zijlstra Cc: Richard Henderson Cc: Richard Weinberger Cc: Thomas Bogendoerfer Cc: Will Deacon Signed-off-by: Andrew Morton --- arch/loongarch/Kconfig | 1 + arch/loongarch/include/asm/pgalloc.h | 7 +++---- 2 files changed, 4 insertions(+), 4 deletions(-) --- a/arch/loongarch/include/asm/pgalloc.h~loongarch-mm-enable-mmu_gather_rcu_table_free +++ a/arch/loongarch/include/asm/pgalloc.h @@ -55,8 +55,7 @@ static inline pte_t *pte_alloc_one_kerne return pte; } -#define __pte_free_tlb(tlb, pte, address) \ - tlb_remove_ptdesc((tlb), page_ptdesc(pte)) +#define __pte_free_tlb(tlb, pte, address) tlb_remove_ptdesc((tlb), page_ptdesc(pte)) #ifndef __PAGETABLE_PMD_FOLDED @@ -79,7 +78,7 @@ static inline pmd_t *pmd_alloc_one(struc return pmd; } -#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) +#define __pmd_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x)) #endif @@ -99,7 +98,7 @@ static inline pud_t *pud_alloc_one(struc return pud; } -#define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) +#define __pud_free_tlb(tlb, x, addr) tlb_remove_ptdesc((tlb), virt_to_ptdesc(x)) #endif /* __PAGETABLE_PUD_FOLDED */ --- a/arch/loongarch/Kconfig~loongarch-mm-enable-mmu_gather_rcu_table_free +++ a/arch/loongarch/Kconfig @@ -187,6 +187,7 @@ config LOONGARCH select IRQ_LOONGARCH_CPU select LOCK_MM_AND_FIND_VMA select MMU_GATHER_MERGE_VMAS if MMU + select MMU_GATHER_RCU_TABLE_FREE select MODULES_USE_ELF_RELA if MODULES select NEED_PER_CPU_EMBED_FIRST_CHUNK select NEED_PER_CPU_PAGE_FIRST_CHUNK _ Patches currently in -mm which might be from zhengqi.arch@bytedance.com are mm-change-mm-pt_reclaimc-to-use-asm-tlbh-instead-of-asm-generic-tlbh.patch alpha-mm-enable-mmu_gather_rcu_table_free.patch loongarch-mm-enable-mmu_gather_rcu_table_free.patch mips-mm-enable-mmu_gather_rcu_table_free.patch parisc-mm-enable-mmu_gather_rcu_table_free.patch um-mm-enable-mmu_gather_rcu_table_free.patch mm-make-pt_reclaim-depends-on-mmu_gather_rcu_table_free.patch