From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6B0DC47082 for ; Sat, 5 Jun 2021 14:51:07 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8D53261287 for ; Sat, 5 Jun 2021 14:51:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8D53261287 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 009B86B006C; Sat, 5 Jun 2021 10:51:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EFBAF6B006E; Sat, 5 Jun 2021 10:51:06 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D4E966B0070; Sat, 5 Jun 2021 10:51:06 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0141.hostedemail.com [216.40.44.141]) by kanga.kvack.org (Postfix) with ESMTP id 9C6826B006C for ; Sat, 5 Jun 2021 10:51:06 -0400 (EDT) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 3A0BC5847 for ; Sat, 5 Jun 2021 14:51:06 +0000 (UTC) X-FDA: 78219957732.01.DB7F6D6 Received: from mail-ua1-f48.google.com (mail-ua1-f48.google.com [209.85.222.48]) by imf02.hostedemail.com (Postfix) with ESMTP id E5B7E41AD7BC for ; Sat, 5 Jun 2021 14:51:05 +0000 (UTC) Received: by mail-ua1-f48.google.com with SMTP id w5so6947252uaq.9 for ; Sat, 05 Jun 2021 07:51:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=EaYMRz5FnMODqFyqdlRK0aeJzGq0sU+8h7rdTmyh4FI=; b=OnLDaNMeg+Jz5REkQr9/Veu+4UVm+yAQAcq935Z1UmoEeCG94DnXjE4xEFtyQvNPln pcTDLgySGaaUode2vpolq8a58/KcOgXYZFeDQCy3KBRXPdRwUdxkkT8PI0pAFrggTJkR jStRMBOW5G4vs75HpdwRW6qUskE9dAYC0i5BB6AHLlfSFM3kjp1EqEr9zp4LBtkZ8+7z LgkxaK6SsB4eo1xG0JPzOZvFyZt/TL+LZXWvgJOhWbB42zFD2i0xOBvqyKfDLxvj1NaV tSH7AVn2Kzpzr+CjDSJXSkfdtNX+b/i9xB+BhFhoBHfblvSCA5yDxF0Cl63yPaFBMosx GdKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=EaYMRz5FnMODqFyqdlRK0aeJzGq0sU+8h7rdTmyh4FI=; b=CN7MLmNU/1ZXNFVfe8LLQNYueBDR39KL6R7bieQYUoKMSa3HkLEVnOuzSOnd6ZSgUA RVCRLlGVm+Z9kHNFCLh+pbj1FZ+HSCZQlo1QQCRaip6i+4e6fn88b+Vlyumsl8tHdNjE RivTv0Ta5AtuUjz1+D5Zlv7jCJiXi0urGFqzLrTf9nHiycoymZneA/RKiDkHZ5tSuaVR GJBYXO86Nj/HjxpDyzwxQRkCYRf4fuFNtfwW0lRW8srTsbU81yJoslTahRaH7UUPTF1X MWFu5hRaTbYlBCW93tQRcnFRNarBb2NHK2l7sSgUMhY0d9Gh4/Q3YpjzESmIkRtWT4/A 5+Ng== X-Gm-Message-State: AOAM530ouWiYtHqf737ex1R4Hd1xf2oueZOpRkU8GaZRiNTcKVY8iO6u Urj8HIVQD9DLslkFqAi568Hm1cdGu9aNpTjhz5A= X-Google-Smtp-Source: ABdhPJxR+RZZiKqyMSS5ZrW0TyrriuzYpeu3BcY0o581d89sWGIvLZmNDSxpDSdS33OiMDbdZQX1DD8KCCcjAT6Us+4= X-Received: by 2002:a1f:a681:: with SMTP id p123mr5234215vke.22.1622904665047; Sat, 05 Jun 2021 07:51:05 -0700 (PDT) MIME-Version: 1.0 From: jim.cromie@gmail.com Date: Sat, 5 Jun 2021 08:50:39 -0600 Message-ID: Subject: how to return a chunk of kernel .data to free mem ? To: LKML , Linux Memory Management List , Jason Baron Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=OnLDaNMe; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf02.hostedemail.com: domain of jimcromie@gmail.com designates 209.85.222.48 as permitted sender) smtp.mailfrom=jimcromie@gmail.com X-Stat-Signature: 3exeayrbmnbyooatjakxf4u9qpsif6y3 X-Rspamd-Queue-Id: E5B7E41AD7BC X-Rspamd-Server: rspam02 X-HE-Tag: 1622904665-397529 X-Bogosity: Ham, tests=bogofilter, spamicity=0.002306, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: I have convinced DYNAMIC_DEBUG code to not need about 15% of its __dyndbg section, about 30kb on my test kernel. This memory is not kmalloc'd, so krealloc wont work. (I tried anyway, on a loaded module, it panicd) Is there a way to return a chunk of init .data memory to general use ? heres the patchset; https://lore.kernel.org/lkml/20210529200029.205306-1-jim.cromie@gmail.com/