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 5F74F31A041; Thu, 15 Jan 2026 19:40:21 +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=1768506021; cv=none; b=EQZLZsZdJHG+ZOQ1Elp5/JajnKUDcJ6XT7vswLNeFHxQYOdDiCXY9rM6LRbQ+gpviUZt/HsuSCl4+kPqPrLud0wzPZJjLyT4BGkz2n1N1NC0HuUSuBgSZd3FXCnP4TS66kqhmt746xwrZ5VKvdmcBzkH7CidxMLZqdMzHzG9flk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768506021; c=relaxed/simple; bh=nLGaqWdpnH8fEEVBvwXlgYEC0zyBCL56gElb3tVuEgQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=oH/2qVCeLDXqjgIkILrVSEuihlPNL83RthVrNiO4pQucOmHEm2s/uWcgPsEsoAJH/bS0Wk3NDhWvWnBmk62ppLuXFd6WkGFcHNqT7pFsGBsstabDpL8TObFxWpQ7SX3w4q0xtXr7aKmoauOk+6HONnSYGp8grNU3dfKymyVGUGM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JCULaqSi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JCULaqSi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B4296C16AAE; Thu, 15 Jan 2026 19:40:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768506020; bh=nLGaqWdpnH8fEEVBvwXlgYEC0zyBCL56gElb3tVuEgQ=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=JCULaqSiagqhvxYAXnBf6QFqboCKJo9CFWcUgzbmW/KxbKuSq3ws3wJEZqOFjN7i5 ZEqFPJ5VJabscSnYwpOK0bwmhOGlZHn7L7ywxQyesZzR7i9yc80uDz+0diYQCK7r8h +ePYH6HLe5Fny+wdLdQpxqxNCBOBQ2AOmors7MInu/5HnaEiatL2cp0gk/qke/tnUn 6ilQN8j4ZL+IvYc6LZtddA74UPBzh8jyxE37Pq6NBmi34aVheXNk7oyTxhlDnxPis0 IhdpPGmwT8OGdkT7uxj6LqI7rInF8pEJSvXAyhFyiR5Jp5vVAAnyFZC5nwXN9QzxJ+ AaZtzAWStrNQA== Message-ID: <84a00b16-0fd3-4a32-bb7a-f117dcdcf1e2@kernel.org> Date: Thu, 15 Jan 2026 20:40:13 +0100 Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RESEND v3 0/4] mm/hugetlb: fixes for PMD table sharing (incl. using mmu_gather) To: Andrew Morton , Lorenzo Stoakes Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Peter Zijlstra , Arnd Bergmann , Muchun Song , Oscar Salvador , "Liam R. Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Rik van Riel , Harry Yoo , Laurence Oberman , Prakash Sangappa , Nadav Amit References: <20251223214037.580860-1-david@kernel.org> <20260115100501.2b956d74aabfe142d37aa608@linux-foundation.org> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAa2VybmVsLm9yZz7CwY0EEwEIADcWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCaKYhwAIbAwUJJlgIpAILCQQVCgkIAhYCAh4FAheAAAoJEE3eEPcA/4Naa5EP/3a1 9sgS9m7oiR0uenlj+C6kkIKlpWKRfGH/WvtFaHr/y06TKnWn6cMOZzJQ+8S39GOteyCCGADh 6ceBx1KPf6/AvMktnGETDTqZ0N9roR4/aEPSMt8kHu/GKR3gtPwzfosX2NgqXNmA7ErU4puf zica1DAmTvx44LOYjvBV24JQG99bZ5Bm2gTDjGXV15/X159CpS6Tc2e3KvYfnfRvezD+alhF XIym8OvvGMeo97BCHpX88pHVIfBg2g2JogR6f0PAJtHGYz6M/9YMxyUShJfo0Df1SOMAbU1Q Op0Ij4PlFCC64rovjH38ly0xfRZH37DZs6kP0jOj4QdExdaXcTILKJFIB3wWXWsqLbtJVgjR YhOrPokd6mDA3gAque7481KkpKM4JraOEELg8pF6eRb3KcAwPRekvf/nYVIbOVyT9lXD5mJn IZUY0LwZsFN0YhGhQJ8xronZy0A59faGBMuVnVb3oy2S0fO1y/r53IeUDTF1wCYF+fM5zo14 5L8mE1GsDJ7FNLj5eSDu/qdZIKqzfY0/l0SAUAAt5yYYejKuii4kfTyLDF/j4LyYZD1QzxLC MjQl36IEcmDTMznLf0/JvCHlxTYZsF0OjWWj1ATRMk41/Q+PX07XQlRCRcE13a8neEz3F6we 08oWh2DnC4AXKbP+kuD9ZP6+5+x1H1zEzsFNBFXLn5EBEADn1959INH2cwYJv0tsxf5MUCgh Cj/CA/lc/LMthqQ773gauB9mN+F1rE9cyyXb6jyOGn+GUjMbnq1o121Vm0+neKHUCBtHyseB fDXHA6m4B3mUTWo13nid0e4AM71r0DS8+KYh6zvweLX/LL5kQS9GQeT+QNroXcC1NzWbitts 6TZ+IrPOwT1hfB4WNC+X2n4AzDqp3+ILiVST2DT4VBc11Gz6jijpC/KI5Al8ZDhRwG47LUiu Qmt3yqrmN63V9wzaPhC+xbwIsNZlLUvuRnmBPkTJwwrFRZvwu5GPHNndBjVpAfaSTOfppyKB Tccu2AXJXWAE1Xjh6GOC8mlFjZwLxWFqdPHR1n2aPVgoiTLk34LR/bXO+e0GpzFXT7enwyvF FFyAS0Nk1q/7EChPcbRbhJqEBpRNZemxmg55zC3GLvgLKd5A09MOM2BrMea+l0FUR+PuTenh 2YmnmLRTro6eZ/qYwWkCu8FFIw4pT0OUDMyLgi+GI1aMpVogTZJ70FgV0pUAlpmrzk/bLbRk F3TwgucpyPtcpmQtTkWSgDS50QG9DR/1As3LLLcNkwJBZzBG6PWbvcOyrwMQUF1nl4SSPV0L LH63+BrrHasfJzxKXzqgrW28CTAE2x8qi7e/6M/+XXhrsMYG+uaViM7n2je3qKe7ofum3s4v q7oFCPsOgwARAQABwsF8BBgBCAAmAhsMFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAmic2qsF CSZYCKEACgkQTd4Q9wD/g1oq0xAAsAnw/OmsERdtdwRfAMpC74/++2wh9RvVQ0x8xXvoGJwZ rk0Jmck1ABIM//5sWDo7eDHk1uEcc95pbP9XGU6ZgeiQeh06+0vRYILwDk8Q/y06TrTb1n4n 7FRwyskKU1UWnNW86lvWUJuGPABXjrkfL41RJttSJHF3M1C0u2BnM5VnDuPFQKzhRRktBMK4 GkWBvXlsHFhn8Ev0xvPE/G99RAg9ufNAxyq2lSzbUIwrY918KHlziBKwNyLoPn9kgHD3hRBa Yakz87WKUZd17ZnPMZiXriCWZxwPx7zs6cSAqcfcVucmdPiIlyG1K/HIk2LX63T6oO2Libzz 7/0i4+oIpvpK2X6zZ2cu0k2uNcEYm2xAb+xGmqwnPnHX/ac8lJEyzH3lh+pt2slI4VcPNnz+ vzYeBAS1S+VJc1pcJr3l7PRSQ4bv5sObZvezRdqEFB4tUIfSbDdEBCCvvEMBgoisDB8ceYxO cFAM8nBWrEmNU2vvIGJzjJ/NVYYIY0TgOc5bS9wh6jKHL2+chrfDW5neLJjY2x3snF8q7U9G EIbBfNHDlOV8SyhEjtX0DyKxQKioTYPOHcW9gdV5fhSz5tEv+ipqt4kIgWqBgzK8ePtDTqRM qZq457g1/SXSoSQi4jN+gsneqvlTJdzaEu1bJP0iv6ViVf15+qHuY5iojCz8fa0= In-Reply-To: <20260115100501.2b956d74aabfe142d37aa608@linux-foundation.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/15/26 19:05, Andrew Morton wrote: > On Thu, 15 Jan 2026 17:22:30 +0000 Lorenzo Stoakes wrote: > >> Any update on this series? It's a hotfix series and I don't see it queued >> up anywhere in either mm-hotfixes-unstable or mm-hotfixes-stable, this >> issue is causing ongoing problems for a lot of people, is there any reason >> it's being delayed? >> >> It's received extensive approval and testing, so should be GTG right? > > This has been in mm-unstable for a long time. As the series had a > mixture of cc:stable and not-cc:stable patches, I figured we'd merge > them all into next merge window and let the -stable maintainers figure > it all out. > > As this is more urgent than I believed, we need to figure out what to > do. > > a) Pluck out the two cc:stable patches, merge just those into 6.19-rc. > > b) Merge all of them into 6.19-rc, let -stable maintainers figure it out Right. We can just CC: stable on comment fixes #2 and #3 to make back-porting easier. > > c) Stick with my original plan. > > > > The cc:stable "mm/hugetlb: fix excessive IPI broadcasts when unsharing > PMD tables using mmu_gather" has dependencies on the preceding two > non-cc:stable patches. At least one of them (doc update), yes. > > So I'm thinking I add cc:stable to everything and send the whole series > into 6.19-rcX. wdyt? Works for me. > > > Also, David, where do we stand with > > : I'd love to get some generic hugetlb testing on arm64 and powerpc, > : that do hugetlb TLB flushing stuff a bit more special. > : > : I'll try doing some arm64 testing early in the new year myself. > > ? Not done yet, unfortunately. (I don't (yet) have easy access to decent arm64 hardware ;) ) I still hope that Jann could quickly have a look, but it's been a while already since I posted v1. -- Cheers David