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[209.85.208.171]) by smtp.gmail.com with ESMTPSA id x28sm7481079ljd.24.2020.03.30.15.27.58 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 30 Mar 2020 15:27:58 -0700 (PDT) Received: by mail-lj1-f171.google.com with SMTP id r24so19949392ljd.4 for ; Mon, 30 Mar 2020 15:27:58 -0700 (PDT) X-Received: by 2002:a2e:b4cb:: with SMTP id r11mr8652748ljm.201.1585607278073; Mon, 30 Mar 2020 15:27:58 -0700 (PDT) MIME-Version: 1.0 References: <20200330151441.e3a704f7c98dc70cdce95d0e@linux-foundation.org> In-Reply-To: <20200330151441.e3a704f7c98dc70cdce95d0e@linux-foundation.org> From: Linus Torvalds Date: Mon, 30 Mar 2020 15:27:42 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 1/2] mm/memory_hotplug: simplify calculation of number of pages in __remove_pages() To: Andrew Morton Cc: David Hildenbrand , Linux Kernel Mailing List , Linux-MM , Segher Boessenkool , Oscar Salvador , Michal Hocko , Baoquan He , Dan Williams , Wei Yang Content-Type: text/plain; charset="UTF-8" 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 Mon, Mar 30, 2020 at 3:14 PM Andrew Morton wrote: > > My nightly check-all-the-patches-for-various-cruft script emails me > about =3D but I didn't' have a test for "o=$m". I just added one. =3D may be the common one, but =20 and =09 are others that end up showing up when whitespace gets quoted for various reasons. Another one is =46 for 'F'. Why? Because some mailers think that "From" at the beginning of a line is the mbox beginning marker, and they'll escape any line that begins with "From" to use "=46rom" instead. Those mailers are wrong (at a _minimum_ it's "From " with a space, and you generally should be even stricter than that), but it happens. And obviously, if there is real 8-bit stuff, you'll get all the real odd hex noise. Linus