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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1phDFx-008d3L-CI; Tue, 28 Mar 2023 17:37:13 +0000 Date: Tue, 28 Mar 2023 18:37:13 +0100 From: Matthew Wilcox To: Luis Chamberlain Cc: Mike Rapoport , Michal Hocko , linux-mm@kvack.org, Andrew Morton , Dave Hansen , Peter Zijlstra , Rick Edgecombe , Song Liu , Thomas Gleixner , Vlastimil Babka , linux-kernel@vger.kernel.org, x86@kernel.org, linux-modules@vger.kernel.org, Pankaj Raghav , Daniel Gomez , "kbus >> Keith Busch" , Davidlohr Bueso , Adam Manzanares , Kees Cook Subject: Re: [RFC PATCH 1/5] mm: intorduce __GFP_UNMAPPED and unmapped_alloc() Message-ID: References: <20230308094106.227365-1-rppt@kernel.org> <20230308094106.227365-2-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 562CE120010 X-Stat-Signature: hiwxxhxtwz714ozymwcdxe643mbxa7bb X-HE-Tag: 1680025045-197552 X-HE-Meta: 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 sbUEp3kw UPU0rKn5f3AOspPgi1iRuXEazscXrW1KWsqq7rhnQXzlLWENjnDXhRE2nO0mIK6UIcZZsePUypgEzzt4mF+CmDNPXrz1XPKQgOnipe+0B7rdrb+dBDGq3ZZS9tGj3uTSfhYdPVCWnsfd+iDjdyLdQXw5Usc39zFT5yxbpn3IVzv+9d8XpftSRLZRMgdGj0dox3OzWe0pqqJ5mTaY= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Mar 28, 2023 at 10:18:50AM -0700, Luis Chamberlain wrote: > differences with eBPF programs is that modules *can* be rather large > in size. What is the average size of modules? Well let's take a look: > > mcgrof@bigtwin /mirror/code/mcgrof/linux-next (git::master)$ find ./ > -name \*.ko| wc -l > 9173 ummm ... wc -c, surely? > mcgrof@bigtwin /mirror/code/mcgrof/linux-next (git::master)$ find ./ > -name \*.ko| xargs stat -c "%s - %n" | sort -n -k 1 -r | tail > -$((9173-5)) | awk 'BEGIN {sum=0} {sum+=$1} END {print sum/NR/1024}' > 160.54 ... which invalidates all of these.