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 5350AC43458 for ; Sat, 11 Jul 2026 10:15:58 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0DA326B0005; Sat, 11 Jul 2026 06:15:57 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 08C006B0088; Sat, 11 Jul 2026 06:15:57 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EBB536B008A; Sat, 11 Jul 2026 06:15:56 -0400 (EDT) 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 D1CC56B0005 for ; Sat, 11 Jul 2026 06:15:56 -0400 (EDT) Received: from smtpin26.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 59CC61699FD for ; Sat, 11 Jul 2026 10:15:56 +0000 (UTC) X-FDA: 84976089912.26.B8EA4D8 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf21.hostedemail.com (Postfix) with ESMTP id C7D4A1C0007 for ; Sat, 11 Jul 2026 10:15:54 +0000 (UTC) Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=HcNK8JNV; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf21.hostedemail.com: domain of rppt@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783764954; b=YSfnV1zL9Ce4mKmVmTiRuzA3BLwQ8pNeN+BFvPQWm80gp/+5rXlDc4Z8iA5m8R2vun8eOe 6JhfrdjwoLT9Xh+utg3OJZxPsBxxJUdDliiHRZ4egWPGfiiKycUJhZX/zhN++vadGwm/WW hbyfZhsv71d/fHBgxdruN+GlOq09eF4= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=HcNK8JNV; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf21.hostedemail.com: domain of rppt@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783764954; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=zcdbPVe2DJM9MtOvkOYgWRb/x7YeFqOeUTEpaV1gBBk=; b=34m9j95Mv6AdATQQIyzkipI/46zQOGywejcHruPFBh0kLz3gW3IFaMLbFIB3jDMuUvBh16 QVMvg05neikQtWj6xa3kqyvNzLk74SFHbpHXM5w/Iyu66EBKrbAJ/xJHjcE+bKfuIC3urZ zC3cIkkLltZDMGcvf6Ngtuoy8IUsbko= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 3603560051; Sat, 11 Jul 2026 10:15:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 994561F000E9; Sat, 11 Jul 2026 10:15:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783764953; bh=zcdbPVe2DJM9MtOvkOYgWRb/x7YeFqOeUTEpaV1gBBk=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=HcNK8JNVL58HlIMFspMoFE3mEFF7f+x2CSh8cYHC5i2UYivFD5iHxlX4k8seziz3W 7JKXwDoO/X7hg7WeYEN0NessED0rrZfTPgZQaAlU5eBD+RVVXNlWyb/q04D8y05R1P M6KAgrLz5/n/FVBNyU4wS7MxQ4A83mu7EVFGMEI8Ol4QxuHbDhSQlvpkeEnvCF+EqY s+Rq3s+y7Xddhetu0ImsMpQWIOUACdzVrupZdkEr/Jjr7DkaAxkeO49Y2Uh/9T4S05 KxPWxCI2hDnQ5IbsCGQAR4UhaKG43+Ha5LFDF/vndH8mrNuEeAw/KjJNsmelSaTIOM 4wzywWF8FEjvw== Date: Sat, 11 Jul 2026 13:15:45 +0300 From: Mike Rapoport To: Lorenzo Stoakes Cc: Andrew Morton , Suren Baghdasaryan , "Liam R. Howlett" , Vlastimil Babka , Shakeel Butt , David Hildenbrand , Michal Hocko , Uladzislau Rezki , Toshi Kani , Catalin Marinas , Will Deacon , David Carlier , Dev Jain , Ryan Roberts , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 2/2] Revert "arm64: Enable vmalloc-huge with ptdump" Message-ID: References: <20260710-series-vmap-race-fix-v1-0-5b3794c113fe@kernel.org> <20260710-series-vmap-race-fix-v1-2-5b3794c113fe@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260710-series-vmap-race-fix-v1-2-5b3794c113fe@kernel.org> X-Rspamd-Queue-Id: C7D4A1C0007 X-Rspam-User: X-Stat-Signature: ioo747wkyuy943dnuregrbbm6nwh5mft X-Rspamd-Server: rspam03 X-HE-Tag: 1783764954-387227 X-HE-Meta: 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 gFt83A3I SYYJ2DhNbroTWnPRG04qq6SJse85dF0ep3PM22AHBc6RY1ZjNbWWrTSuMMU5hW/5Hzb2hGPJoQNuD2ewNDQhHssULJjVvIlxJuVIOqG/weJS4CvZZLxR6J7T95oAF5aN87+EDdUuxlL8s2GhpDPic10MlZGXMiw4IPb8sOx1g8+nBI/iYBnB0Cto0Q6eXirUHZNdjSdZHRRfJimTtqFKFyhp5BbO0q3wBqRkZQr/a8mzY3zSDkgq+6X/liClRiQ/+hUotyk/DRc2Vnp2xBbT5/1D6ZQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Jul 10, 2026 at 11:49:19AM +0100, Lorenzo Stoakes wrote: > Subject: [PATCH 2/2] Revert "arm64: Enable vmalloc-huge with ptdump" Without reading the full changelog this sounds like you are disabling vmalloc-huge with ptdump ;-) How about "remove redundant locking guarding ptdump against vmalloc-huge"? > This partially reverts commit fa93b45fd397 ("arm64: Enable vmalloc-huge > with ptdump"), retaining vmalloc-huge support but eliminating the now > redundant mitigation against a race between huge vmap page table freeing > and ptdump, as this issue has now been fixed at core. > > We also simultaneously remove the arm64 ifdeffery when acquiring the mmap > read lock upon vmap huge page table promotion as it is no longer required. > > Signed-off-by: Lorenzo Stoakes B Acked-by: Mike Rapoport (Microsoft) > --- > arch/arm64/include/asm/ptdump.h | 2 -- > arch/arm64/mm/mmu.c | 43 ++++------------------------------------- > arch/arm64/mm/ptdump.c | 11 ++--------- > mm/vmalloc.c | 15 +++----------- > 4 files changed, 9 insertions(+), 62 deletions(-) -- Sincerely yours, Mike.