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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham 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 3261BC3F2D2 for ; Mon, 2 Mar 2020 11:30:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05E042166E for ; Mon, 2 Mar 2020 11:30:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="hhgdW1px" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727589AbgCBLaO (ORCPT ); Mon, 2 Mar 2020 06:30:14 -0500 Received: from mail-wr1-f74.google.com ([209.85.221.74]:35449 "EHLO mail-wr1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725996AbgCBLaN (ORCPT ); Mon, 2 Mar 2020 06:30:13 -0500 Received: by mail-wr1-f74.google.com with SMTP id w18so5695617wro.2 for ; Mon, 02 Mar 2020 03:30:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=q1I2RKn1Spku5PepO4sKWFq3j0yL+8kFK015J9Szlg0=; b=hhgdW1pxLD06YKoTAOyhOOfXmdrhQnocpCiNC+sZVWf00u78Xx5+jw9fXqhlHPJxTn E9gFz33mmj1u5d6T5L1Sp2+9DpLDtMQikp8DHBLfUrCqdleO9BCK7MFWRA4DLEmPaoor H/dRouNteRsBjBlFqXUtaC9NSGBtor2Qvv30TJGlsY6jBvWIrRtsErxRZ+hPIr56a9QT qzKKaZW21q1Jouw40dFeCb4N9tHpvl7KVnz78uu9/eb5WmOLnIYdRkmtN5RYB6pamNxW xK9qmo2rmGBoNZll9bJakQX+q6jt360fWardBNyQT4Z4SGUDb388Kt2s7CgE5lGnDFwc xb4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=q1I2RKn1Spku5PepO4sKWFq3j0yL+8kFK015J9Szlg0=; b=WY092JK21FHs7Ho3hG5wp+sejiKM/xob6+kPDmCxftNVUI9Sz1DJFQZfYvsP/IYzp4 ZbfmW/fsZdEG3jx/4p2CF3jv+INJWNns/A9xrfat7UqFaywiAUTTCkP5CZxDKVG9LlKv GdsnHQ6JyZZUur7LOCLGFdlFRxe+4Lm+AIJx52g504EPqhHQDoJ5g+3vtSUru3DZFjCW QYnFtfTxdR3Z/maNly6w4QSUfEzKD7ZvT/5Qpl+7EVou/mJs60jF85LYouauz2YPlzEb txclDi9YEyn7HqPEZ3t8xDyikATQUn3HNgBqIJxdYbunk+pIyGmFMvjZGMlOdoe8m56z BSUw== X-Gm-Message-State: APjAAAVkyT0XGpUIptHSA+qQsEs5Tg+hAQDnXF0PnJcTttn0QwLf5XF6 9kjKNcGg9bsJK5gb7AZ4taykOzw4dg== X-Google-Smtp-Source: APXvYqzpDynIsY8fG28WGbWTomC5tcCOPYkZH/xJbbk/HHjiU7jyCTRfq/ZhpTijXyjDMUmAWsPVpE8eWQ== X-Received: by 2002:adf:fa50:: with SMTP id y16mr19928038wrr.79.1583148610099; Mon, 02 Mar 2020 03:30:10 -0800 (PST) Date: Mon, 2 Mar 2020 12:29:39 +0100 Message-Id: <20200302112939.8068-1-jannh@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog Subject: [PATCH] threads: Update PID limit comment according to futex UAPI change From: Jann Horn To: Thomas Gleixner , Ingo Molnar Cc: Andrew Morton , Peter Zijlstra , Darren Hart , linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The futex UAPI changed back in commit 76b81e2b0e22 ("[PATCH] lightweight robust futexes updates 2"), which landed in v2.6.17: FUTEX_TID_MASK is now 0x3fffffff instead of 0x1fffffff. Update the corresponding comment in include/linux/threads.h. Signed-off-by: Jann Horn --- include/linux/threads.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/threads.h b/include/linux/threads.h index 3086dba525e20..18d5a74bcc3dd 100644 --- a/include/linux/threads.h +++ b/include/linux/threads.h @@ -29,7 +29,7 @@ /* * A maximum of 4 million PIDs should be enough for a while. - * [NOTE: PID/TIDs are limited to 2^29 ~= 500+ million, see futex.h.] + * [NOTE: PID/TIDs are limited to 2^30 ~= 1 billion, see FUTEX_TID_MASK.] */ #define PID_MAX_LIMIT (CONFIG_BASE_SMALL ? PAGE_SIZE * 8 : \ (sizeof(long) > 4 ? 4 * 1024 * 1024 : PID_MAX_DEFAULT)) -- 2.25.0.265.gbab2e86ba0-goog