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 [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 2D679385841D for ; Tue, 17 Oct 2023 16:46:11 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 2D679385841D 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 2D679385841D Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697561172; cv=none; b=hqrffM/Ci7zDAQnlXPgI5SvFuoAYyuZ6qVsKLEwDxDRtiKpN06TrYULbWrCbh4zZTZd8Nrr1lEpU56vw+PXztcKOtyytip0VDk4SF8z86xsMRdhqQc+1VFuwo8TiEEi8YSLCi1C9dVrxTCW66owJhZdtzyZ3W5NNtIAbY6GvTcQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697561172; c=relaxed/simple; bh=+zrZAlaty7RAY9pJyY/J4mdgz+xWTzuosqFDtnkszns=; h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version; b=qVQETcQ/nZwDYiWpnrOyWSHkyEsfU2+apP6Q/41+dSNXGC9c9yr+XsfG4r3RHXGKTSckl5sY50SY13/pd+OrNf+XWOG+srJ0FEkoPdV8G+Sn/2YrtJ6w7BnUCDQtdnyB+HEwGb0sek+VhQ7WST0gGNcOVKzk1rNuW+QZW41RbOw= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1697561170; 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=zw+XxmUwmK3bYtVxBRoojIFfv7WZ1Flk4OzcWLeSMZw=; b=KEU0SBchMR6OmsOHZlCpsF45hc1bwHu1R2UP2X949zi4eopiM6zL8EnXYvYfDE+Q44JMU8 i3cwe1SZop6TJqigfGx5vq4zMmYbX/ERrCKQDJQSWjD36E6O38vVcL677Gwqfrq1NoB8VB MfCy8jI1r1x3p+5lQX2tW78GEdYJSQk= 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-425-OfXeprzXNli881M6YSSMfw-1; Tue, 17 Oct 2023 12:45:56 -0400 X-MC-Unique: OfXeprzXNli881M6YSSMfw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (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 0A9511029F58; Tue, 17 Oct 2023 16:45:56 +0000 (UTC) Received: from greed.delorie.com (unknown [10.22.9.85]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E9721C15BB8; Tue, 17 Oct 2023 16:45:55 +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 39HGjsu82730103; Tue, 17 Oct 2023 12:45:54 -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 12:45:54 -0400 Message-ID: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 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_H4,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, This leads to the next question: how to express these constraints in the tunables.conf file. A the simplest, prefixing each tunable with '+', '-', or '=' for example? For stricter, looser, or can't change? Else we need to come up with some more flexible "flag parser".