From nobody Wed Mar 22 18:03:37 2023 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Phbv924Nmz416ZQ for ; Wed, 22 Mar 2023 18:03:49 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from mailhost.m5p.com (mailhost.m5p.com [74.104.188.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "m5p.com", Issuer "R3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Phbv85SCkz3wtF for ; Wed, 22 Mar 2023 18:03:48 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of george+freebsd@m5p.com designates 74.104.188.4 as permitted sender) smtp.mailfrom=george+freebsd@m5p.com; dmarc=none Received: from [IPV6:2001:470:1f07:15ff::26] (court.m5p.com [IPv6:2001:470:1f07:15ff:0:0:0:26]) (authenticated bits=0) by mailhost.m5p.com (8.16.1/8.15.2) with ESMTPSA id 32MI3clA002393 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Wed, 22 Mar 2023 14:03:43 -0400 (EDT) (envelope-from george+freebsd@m5p.com) Message-ID: Date: Wed, 22 Mar 2023 14:03:37 -0400 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: Periodic rant about SCHED_ULE Content-Language: en-US To: freebsd-hackers@freebsd.org References: <202303221710.32MHAhe9047582@gndrsh.dnsmgr.net> <27f46bc2-54f8-f5aa-79ca-184e86d185d8@m5p.com> From: George Mitchell In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=0.0 required=10.0 tests=HELO_NO_DOMAIN,NICE_REPLY_A autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on mattapan.m5p.com X-Spamd-Result: default: False [-3.06 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-0.999]; NEURAL_HAM_LONG(-0.99)[-0.988]; NEURAL_HAM_SHORT(-0.77)[-0.773]; R_SPF_ALLOW(-0.20)[+a:c]; MIME_GOOD(-0.10)[text/plain]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:701, ipnet:74.104.0.0/16, country:US]; MIME_TRACE(0.00)[0:+]; TAGGED_FROM(0.00)[freebsd]; DMARC_NA(0.00)[m5p.com]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Queue-Id: 4Phbv85SCkz3wtF X-Spamd-Bar: --- X-ThisMailContainsUnwantedMimeParts: N On 3/22/23 13:42, Karl Denninger wrote: > [...] > Am I correct that toggling between these without a kernel build (or even > at runtime) is not possible?  Been a minute since I've cared.... :-) > [...] Rebuilding the kernel is the only way I know. In an ideal world, the scheduler would be a loadable kernel module (if that's even possible), if we can't pull the switch back to 4BSD as the default. -- George