From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 935413858C52 for ; Tue, 17 Oct 2023 15:43:07 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 935413858C52 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 935413858C52 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697557388; cv=none; b=A1duP87qvQuI0tMz0WNqJuwSXKqRp/E00sMK2UbUc7MCW5RDh4audGrBK2a1cmjZDeObOgO7JHW8uYZ9Ofm7MZ0RJTISwnVFeD8Xa95kgjN8ceNtrIEI0jHriwAjFwAnDyOTX8lEV5quy1KCF/F+rGFztgCuU0XRr84XHdsA3Cs= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697557388; c=relaxed/simple; bh=gE80EgH+pEBwy9LrwJnm6OObqfV8+AvwdPSq+mLo5KY=; h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version; b=LbvF14ZENur/kh6spwvvDvSurhQbkbB/Jw/sOzINKjOXC15obH8Hx2mQATiOd++pMaZrMZCIRGAATs6NpudGw77LXk9rj1RcmeGOx/whDGcrmVGTbCtUU/LzyqGN4ZYAnYrrAJAgU3WkEkEl7mftJZFYjBJxP+zdQ5oSA+GkulY= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697557387; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to; bh=o1GpVox2jEOWJAs7jEx8U9hjbyTryYsTsHaC5NCrH4Y=; b=EomauZCFgBVbKWGBF+GW+AYh6Tc2n7nPka50EvovmtLGfhu7h7idj0Pzknc8OSz9X0gZ+0 CeLDgck69MEtR3DKcKxIsPs5P5P9o40I4BiG5fMedxVB8Zaf3bFb3QhdvQuvMkFfeJfHwn A227qcAd+W78cAqktsRBD/zMnpwfFVg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-100-Cym0Cf_VP0a7W8XWD4yziw-1; Tue, 17 Oct 2023 11:43:04 -0400 X-MC-Unique: Cym0Cf_VP0a7W8XWD4yziw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B6E9A8E4142; Tue, 17 Oct 2023 15:43:03 +0000 (UTC) Received: from greed.delorie.com (unknown [10.22.9.85]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A2A7F1121314; Tue, 17 Oct 2023 15:43:03 +0000 (UTC) Received: from greed.delorie.com.redhat.com (localhost [127.0.0.1]) by greed.delorie.com (8.15.2/8.15.2) with ESMTP id 39HFh3Yk2728547; Tue, 17 Oct 2023 11:43:03 -0400 From: DJ Delorie To: Siddhesh Poyarekar Cc: adhemerval.zanella@linaro.org, libc-alpha@sourceware.org Subject: Re: RFC: system-wide default tunables In-Reply-To: <8b216d3c-5f38-3ef5-1764-8cd811936714@gotplt.org> Date: Tue, 17 Oct 2023 11:43:03 -0400 Message-ID: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Siddhesh Poyarekar writes: > Only stricter overrides to systemwide tunables should be allowed, e.g. > going from enabled memory tagging to disabled memory tagging. For > numeric values such as mmap_threshold, we may need to figure out on a > case by case basis what constitutes "stricter". Encoding "stricter" in the cache file might be difficult. If we were to include enforcement, I'd opt for "can't override" vs "can't override unless stricter".