From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 412C5233927 for ; Sat, 11 Jul 2026 10:15:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783764955; cv=none; b=bA+wJYsVRKcCCPShHLCnFAaUtbjgy8gppPro1afTvaSV/zkxk41/rX9UApyZIQdtMxtt0i+SA/oGTUqge3rlNDQW2f2289kpC9iRWpw/pYr/Svk9ChIEYwmbUArSFYCPbUVOgZDssXw9VXtecIIUgC460aqa03MmrlRKgcaSTJA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783764955; c=relaxed/simple; bh=7nO5JFhyY5vYkXxFFgPjgELxNfFplHy440Iiw9hVWSw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cW1RXsW6/rLB4NQJI93zfLTzoW1+w2ibXtPNTdxm5DS/Vab9HlV96UGy7S4HXCEBueUBXzXCxHAn+u5cOKQ7LoG1qbVTlQw/BMG1GNl/MTQdGrv3YwPgBVsALb6/CC0Cz24N+R4X7w5fAe1Xcy01L/BGNGk/7bW/XO/sqv4lh48= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HcNK8JNV; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HcNK8JNV" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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> 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.