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 D5B43283FCD; Tue, 30 Dec 2025 22:01:03 +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=1767132064; cv=none; b=Wjpdh2GZpyiHk6nnEeYNfPA/heSPRTdqCWTpnQm0vW0HZP0Syp8zmcRUt3zmSTvuxPYwSrEfb1PvuPP6ZYClubMMNt3wTSZZonea+unSTHIVTP7avsMnWb6JO9d/C7mVVVDBwOnsc/YjWDLntG+BUFSkcvIbQCQJWKAMIj2flOg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767132064; c=relaxed/simple; bh=AwKXS5qfRcE5WBRvoQ+OLxVnWHCnRm9YUX47a62+58o=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=CbQZaCu4fMtuV1PlizdJDZsSQp20eA6gxe+auGs8Mqq06cQzb0aFrYfOwhYUCbAVYqZytjWgFNvuby4v/ry1l4JlSDbNEAf1Azp3vA3dJVApkEqhV743VHgHx3szX4wzWrfqEob6KK6Hop9SwpJgwLXyNXBBhmBe/61jSDXPk+8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IWivimCr; 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="IWivimCr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5BA6DC113D0; Tue, 30 Dec 2025 22:00:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767132063; bh=AwKXS5qfRcE5WBRvoQ+OLxVnWHCnRm9YUX47a62+58o=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=IWivimCrtOyINskmmLAhy6/igkHIx1E/ClX0ZQYGyHxk1UXhd5uoPMfkybAiHcQ9y K/0B4XygH/WDV5uqQrKOIbdCB+qtJaKC+PKg5OwkNQEJWshw3myH8z4r+qJ23PjKom NylPw51jkM3TZAXsborhx6SREG/OpbSb9x40L79Vd7ol9ySCPpR0cK8C9dCl9XZwGx J5g/1E2ZX+bH0HFt0l4J9liDp+C+BZEOYpb0aDekIIyI2gfVEYS82vS9ofhpi2zLUk Rgm3PiotFK8xfZrun03mCZClS+AVywjl0SBkxAtc2RRjy13TIxd3lEjS4CbBEBzDLv fcDNuIJwvxAxQ== Message-ID: Date: Tue, 30 Dec 2025 23:00:55 +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 4/4] mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather To: Harry Yoo Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, Will Deacon , "Aneesh Kumar K.V" , Andrew Morton , Nick Piggin , Peter Zijlstra , Arnd Bergmann , Muchun Song , Oscar Salvador , "Liam R. Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Pedro Falcato , Rik van Riel , Laurence Oberman , Prakash Sangappa , Nadav Amit , stable@vger.kernel.org References: <20251223214037.580860-1-david@kernel.org> <20251223214037.580860-5-david@kernel.org> From: "David Hildenbrand (Red Hat)" Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit >> >> Fixes: 1013af4f585f ("mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race") >> Reported-by: Uschakow, Stanislav" >> Closes: https://lore.kernel.org/all/4d3878531c76479d9f8ca9789dc6485d@amazon.de/ >> Tested-by: Laurence Oberman >> Cc: >> Signed-off-by: David Hildenbrand (Red Hat) >> --- > > Looks correct and nothing jumped out at me during review, so: > Acked-by: Harry Yoo > Thanks Harry! And thanks again for making me look again at the hugetlb mmu_gather horrors :) -- Cheers David