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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775758808; bh=ZigHSvBx+14kIC9PKUwmY331LWP2TKj0II3UDkUytQE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=JQ/eRRmOmwVPwBC6gVdr4zwewEVLiI/+vLuKtcpWC10Bk0bb2vqaE8VDNfsbIzKJ7 bUpUhXPjK5cZDnRd0tMElCfCuWDCoS83Rrk6RdORF0CTiiDQNEh728lRv01BW3G7Cf QuWR0/5swDp3fhZk0qgzrD0SXGVIMhyh8LAEJr450idKjGtUC32p8J2n+Fc32OzmW8 V5+ekgqF7ORGzdhUv1DRoEBDIJq0wI3vU4Kls8FJMkL9D5oD9l9BQVke9JFsBRs1S4 gjPSsLLZnCxWgT5UAPWLRbakWvvXpPTWaGRq8AOTvTKNTT2LUVeluT8XOCgY9cYDAt OpzqJcpkEvG7g== Message-ID: Date: Thu, 9 Apr 2026 20:20:01 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC] mm: stress-ng --mremap triggers severe lruvec lock contention in populate/unmap paths To: John Hubbard , Lorenzo Stoakes , Hugh Dickins Cc: Joseph Salisbury , Andrew Morton , Chris Li , Kairui Song , Jason Gunthorpe , Peter Xu , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , linux-mm@kvack.org, LKML References: <4a4f5b48-8a1d-48f8-8760-0f5d43b5d483@nvidia.com> <982e5964-5ea6-eaf7-a11a-0692f14a6943@google.com> <2cec5f0a-93cc-4572-9793-17f9fd123d2c@nvidia.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: qyrkkmj96ajgyp458e48jd1bqnj3srmf X-Rspamd-Queue-Id: 439221C000D X-Rspam-User: X-Rspamd-Server: rspam03 X-HE-Tag: 1775758810-643881 X-HE-Meta: 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 kj2sMmPP c9GscRjH5IrE8f2ljz4hCxZPOTblW9wGcJzXPTj3l3FzHqWrQm4qVj+NM9BDb6T+iUlAJimV9xpeX0WlZlfRIpyXoI+3+E0KJeLB7LiaePGuBAkDjIbQwMerIqzbVzUxcbksff6dD7b9d1kf6rHPb8X1pSstRGFJ6OAjTp2Iikh8bK0ramThx8nmk5iCBCihOwwkz4TGZBjbOjB+eJsIkr23tpQVeJGcaEsNeT4XWP0Yz2cH63xP5QCS8AXtIc7ftIKOR Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > > Oops, yes. > > I'm on the fence about whether to post an updated version of this. > Maybe wait until someone pops up with a real need for it? > > Thoughts? +1 -- Cheers, David