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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 3EA37C43219 for ; Mon, 21 Dec 2020 17:00:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 110E122B3B for ; Mon, 21 Dec 2020 17:00:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725850AbgLURAL (ORCPT ); Mon, 21 Dec 2020 12:00:11 -0500 Received: from ms.lwn.net ([45.79.88.28]:47762 "EHLO ms.lwn.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726651AbgLURAF (ORCPT ); Mon, 21 Dec 2020 12:00:05 -0500 Received: from lwn.net (localhost [127.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ms.lwn.net (Postfix) with ESMTPSA id DC7EF559; Mon, 21 Dec 2020 16:59:24 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 ms.lwn.net DC7EF559 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lwn.net; s=20201203; t=1608569965; bh=JnmhB4Pw4MEk2ytPAwCi3tTGfBlhp+Wz+PJito8slck=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=irHCFjaRIU5N/TIetdcFkeyZvPgS0EXIoYDM3DloMOEPHMyJJxujCFRD6j9H19C8x hLeOxWu4Gu+XVXkSlHSTaVbliJH/KY3qUyWLJBxVceHD1Rj9fiKBhfIkTIGdXyORBL NThKifKNUPqgO8ied78KTnBT27qO6omE6wnTleJHvN0RS5hdRVfWh9wH0gC1B5x1i2 Mp7ha0LptCavPtpF4Ce21ofL36+X7n9bD7NolqQn6XYKwOuQm8G5SO6CYQAK23BFHp sgnOu//STp/OSYtmkOhXHlB4h3hlYDlOMUxNr0LGQFqgkwI3SWCd5k3wo9aBQgH6WW o8wHK4CYJ3kig== Date: Mon, 21 Dec 2020 09:59:23 -0700 From: Jonathan Corbet To: Fengfei Xi Cc: , Subject: Re: [PATCH] docs: admin-guide: Fix default value of max_map_count in sysctl/vm.rst Message-ID: <20201221095923.67dacea4@lwn.net> In-Reply-To: <20201210082134.36957-1-xi.fengfei@h3c.com> References: <20201210082134.36957-1-xi.fengfei@h3c.com> Organization: LWN.net MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Thu, 10 Dec 2020 16:21:34 +0800 Fengfei Xi wrote: > Since the default value of sysctl_max_map_count is defined as > DEFAULT_MAX_MAP_COUNT from mm/util.c > > int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT; > > DEFAULT_MAX_MAP_COUNT is defined as 65530 (65535-5) in include/linux/mm.h > > #define MAPCOUNT_ELF_CORE_MARGIN (5) > #define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN) > > Signed-off-by: Fengfei Xi > --- > Documentation/admin-guide/sysctl/vm.rst | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst > index f455fa00c..834c3fc74 100644 > --- a/Documentation/admin-guide/sysctl/vm.rst > +++ b/Documentation/admin-guide/sysctl/vm.rst > @@ -428,7 +428,7 @@ While most applications need less than a thousand maps, certain > programs, particularly malloc debuggers, may consume lots of them, > e.g., up to one or two maps per allocation. > > -The default value is 65536. > +The default value is 65530. Applied, thanks. jon