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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E265AEE2084 for ; Fri, 6 Feb 2026 11:14:18 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 53F0F6B0089; Fri, 6 Feb 2026 06:14:18 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 50CEE6B0092; Fri, 6 Feb 2026 06:14:18 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 415D96B0093; Fri, 6 Feb 2026 06:14:18 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 309416B0089 for ; Fri, 6 Feb 2026 06:14:18 -0500 (EST) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id D6BAC1607D3 for ; Fri, 6 Feb 2026 11:14:17 +0000 (UTC) X-FDA: 84413772954.09.2DC88D0 Received: from out-173.mta0.migadu.com (out-173.mta0.migadu.com [91.218.175.173]) by imf14.hostedemail.com (Postfix) with ESMTP id 2B974100014 for ; Fri, 6 Feb 2026 11:14:13 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=RaPi3BqZ; spf=pass (imf14.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.173 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1770376456; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=t10+cy0YbJp1qzuAruOEDHFVPEgf+sIN5MYp954+hik=; b=qhpeVJO/BQ3oAebpl2UTroWiUU2GCxBsjsnfQUJLGQml+j8Dq3lF0SESgThOeUJl7XONqe IE+59NRQgnoemIN4JNie8wPFxVvrO0h+UH6jGzuKD7TURXBGs6PPkMg1YL1HqDQf5ELfwg K/F9MNhZvs0b0CttOcP1XffxUtP26OY= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=RaPi3BqZ; spf=pass (imf14.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.173 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1770376456; a=rsa-sha256; cv=none; b=D9+tPBq50v+JdKkgrBeEy/u3oeqEK+O6iwJc3RMehv52Opi9cBYTIDsWPtuZoDbSwsNOdS Idvq0YwfA7Muay2dG0f83Da6uK2BlLjRV4gOgumdIQy2zi6dC3or/R0LfALxJSoKVlL6ad lS2jHf3aV0aznzzmEnbp5daqH9Yeuzc= Message-ID: <1663ae90-3247-4e12-a25a-049fc3281e19@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1770376450; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=t10+cy0YbJp1qzuAruOEDHFVPEgf+sIN5MYp954+hik=; b=RaPi3BqZPsLqUSHKWvjkyZ/Bf9ppgLwDMnRp3djinkfcParF3X0U5UOMZXVjnrIIj+XKGG qik03O+yZh0BczTm4tqsQ4ypqJYxgFR02cW1b2w7PUE2iHSCCwxRYQBdSb0+Sx1HZWERjm cI4FFTRQSuQeqxHQ+OOhNwrumpE+hso= Date: Fri, 6 Feb 2026 19:13:59 +0800 MIME-Version: 1.0 Subject: Re: [PATCH v4 7/8] mm: convert __HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE config To: "David Hildenbrand (Arm)" , andreas@gaisler.com, richard.weiyang@gmail.com, will@kernel.org, peterz@infradead.org, aneesh.kumar@kernel.org, npiggin@gmail.com, dev.jain@arm.com, ioworker0@gmail.com, linmag7@gmail.com, akpm@linux-foundation.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-alpha@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-um@lists.infradead.org, sparclinux@vger.kernel.org, Qi Zheng References: <5ebfa3d4b56e63c6906bda5eccaa9f7194d3a86b.1769515122.git.zhengqi.arch@bytedance.com> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Qi Zheng In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam12 X-Stat-Signature: 4xbp4imfrcoojahmy76k431fsest4o3c X-Rspamd-Queue-Id: 2B974100014 X-Rspam-User: X-HE-Tag: 1770376453-290607 X-HE-Meta: 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 F+wc3E0j 7wGTDiKXm0z48yi9OgKETaOVyHEIr5dHG+yqRQna66J8R1rHT6lspXK73h49n+NUiyrihK5a/ayQVWVpXVdDhWE7muDanBqy56QaGU7qR2K7PE1wpF9zWldXubFrDhQ3nVpFSuQA9P4okkzvucq2pQb6VZYFiTQI7o2cUOAcMU5mNlBqMxKGtaZ3BI1YZ6idhF8qENR7hMhFKnn731onIAvwJn9hc1fS1VOArjBw6DXVEVAwYhYxE0dY6GpvlVUVowxWbGl2z13ydc5j9JrrRK7f+yjlGRsT/v0O47aW+WZy1aM99OzLu1yNqU2PaFi6ShpI+h8x7xt+N3D+jKCj2fkIb7lwlTMPZayqBsPJ8i+F7J7OpYnATXKKJVBhX8E0cjfSOOS9BwrqICUdloi/PeFsIXUcJpa4DZYUS 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: On 2/6/26 7:06 PM, David Hildenbrand (Arm) wrote: > On 1/27/26 13:13, Qi Zheng wrote: >> From: Qi Zheng >> >> For architectures that define __HAVE_ARCH_TLB_REMOVE_TABLE, the page >> tables at the pmd/pud level are generally not of struct ptdesc type, and >> do not have pt_rcu_head member, thus these architectures cannot support >> PT_RECLAIM. >> >> In preparation for enabling PT_RECLAIM on more architectures, convert >> __HAVE_ARCH_TLB_REMOVE_TABLE to CONFIG_HAVE_ARCH_TLB_REMOVE_TABLE config, >> so that we can make conditional judgments in Kconfig. >> >> Signed-off-by: Qi Zheng >> --- >>   arch/powerpc/Kconfig            | 1 + >>   arch/powerpc/include/asm/tlb.h  | 1 - >>   arch/sparc/Kconfig              | 1 + >>   arch/sparc/include/asm/tlb_64.h | 1 - >>   include/asm-generic/tlb.h       | 2 +- >>   mm/Kconfig                      | 3 +++ >>   6 files changed, 6 insertions(+), 3 deletions(-) >> >> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig >> index 9537a61ebae02..b47aa8fd62742 100644 >> --- a/arch/powerpc/Kconfig >> +++ b/arch/powerpc/Kconfig >> @@ -304,6 +304,7 @@ config PPC >>       select LOCK_MM_AND_FIND_VMA >>       select MMU_GATHER_PAGE_SIZE >>       select MMU_GATHER_RCU_TABLE_FREE >> +    select HAVE_ARCH_TLB_REMOVE_TABLE >>       select MMU_GATHER_MERGE_VMAS >>       select MMU_LAZY_TLB_SHOOTDOWN        if PPC_BOOK3S_64 >>       select MODULES_USE_ELF_RELA >> diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/ >> asm/tlb.h >> index 2058e8d3e0138..1ca7d4c4b90db 100644 >> --- a/arch/powerpc/include/asm/tlb.h >> +++ b/arch/powerpc/include/asm/tlb.h >> @@ -37,7 +37,6 @@ extern void tlb_flush(struct mmu_gather *tlb); >>    */ >>   #define tlb_needs_table_invalidate()    radix_enabled() >> -#define __HAVE_ARCH_TLB_REMOVE_TABLE >>   /* Get the generic bits... */ >>   #include >> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig >> index a630d373e6453..25fa2908d6152 100644 >> --- a/arch/sparc/Kconfig >> +++ b/arch/sparc/Kconfig >> @@ -74,6 +74,7 @@ config SPARC64 >>       select HAVE_KRETPROBES >>       select HAVE_KPROBES >>       select MMU_GATHER_RCU_TABLE_FREE if SMP >> +    select HAVE_ARCH_TLB_REMOVE_TABLE if SMP > > Why the SMP? At least in tlb_64.h, it was not protected by SMP IIUC. Ah, It's just simply aligned with the MMU_GATHER_RCU_TABLE_FREE above. > > Apart from that LGTM. Thanks! >