From nobody Mon Nov 20 01:12:45 2023 X-Original-To: freebsd-current@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 4SYTyZ07gnz51dWm for ; Mon, 20 Nov 2023 01:12:54 +0000 (UTC) (envelope-from zlei@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (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 (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4SYTyY6hyBz3fXv; Mon, 20 Nov 2023 01:12:53 +0000 (UTC) (envelope-from zlei@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1700442773; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VUhcT3TBwsrLe9X0lBJPmCa1csaw453LoyuhQsKNskA=; b=veJkgOo1HrMHhrdHButhO6EEnr3HEZhhCVkiI81QC6lnj3Lh25zpz6xyhXgJhKqr+5cqDo LAw+DlCJemMJS1sbyAsyqz/5T+6iLt/D5OdM0NUQ6h2OUkzRt964PrhzS+p/EBuJiVyJ/n +N8aWS3N9laS7sWWInbOhlIAoOUymn81RCP8DS7JJtmHsE0N5Skf9BdKLEsu9cJve3limV DfuN+NUounnhEWqW5RvQeuHabhgEFhIYHAvRyPpbSbPZpeWB9XOcLz/FPectBWKOpypks6 itq9cHZAkRq3vgxif34mhxMhb7OCd22D7GnKTSNk2WcEbEi7YQM7U0vEMKq2gg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1700442773; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VUhcT3TBwsrLe9X0lBJPmCa1csaw453LoyuhQsKNskA=; b=s9VjuAIE21AUzfEI8dLBLUmHkCQT9gNjXKFL25/aA2tpMtdRglTKLhis8xxWzijwRreh1E EdLqP2zkdkH9izMMDrDnt1aHu1STJQpWOoBFNaoghdkfCDru9NHPCmC3U4Q3+hvXmELfTb hXRnK1eazow6Lye1aWpcfWurnV8qTkPRT+MW4Sh02MdemHaECCMfSGAb58CWrRwzYsSBY7 KwS4ZXWVf8zS1wdCuvbFg5Ayppt6tD8tM2kNp/UE1QJsh5KVNXn7PAakJ4yOjv+hzCTtj8 BREA/bdlaQbr1FG/J2TDtF4a9tvXk62Dy8Vqh0ZInA956gZ5T3jQGde3pXquKw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1700442773; a=rsa-sha256; cv=none; b=KrOv0msnzhGcljKJRM329W5y9YJIsFxX26iOvXxMdZWk9i4RQa4uGq/FcdcPOwVeIGhg/9 vdnqfdyz6HtbNMg5928pMTD+Iq8Kd0endQebDRj9qOOTKg9j933jeue4Bawomz4M5LHrnM cYCfCDxkgFnpeMvcAF4eSFhRMZAd2Dkf5bu2jJZfSEPld19W/9aG7C+p29cgZWbLA8W5Nc zyxhk45MKB/ygvltB5Vr+XcbKtK+JT0MaGiy70jEatr4pY8Dn97PCKoCkcjU1BTkEmGqqW yIB+UZkhz5wDnHPwfoLoi+t6s6/xlyiMqVI+uQux/RzDDwe0b1GZjTrS03rSvw== Received: from smtpclient.apple (ns1.oxydns.net [45.32.91.63]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) (Authenticated sender: zlei/mail) by smtp.freebsd.org (Postfix) with ESMTPSA id 4SYTyX502bz6yg; Mon, 20 Nov 2023 01:12:52 +0000 (UTC) (envelope-from zlei@FreeBSD.org) Content-Type: text/plain; charset=us-ascii List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.4\)) Subject: Re: How much survives an install/reboot cycle? From: Zhenlei Huang In-Reply-To: Date: Mon, 20 Nov 2023 09:12:45 +0800 Cc: freebsd-current@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: References: To: bob prohaska X-Mailer: Apple Mail (2.3696.120.41.1.4) > On Nov 19, 2023, at 11:51 PM, bob prohaska wrote: >=20 > How much of a running system's state survives a reboot? I used to = think > the answer was "nothing", but from time to time a second reboot = behaves > a little differently from the previous one.=20 Warner has a good description about that. I totally agree. >=20 > The most recent example was an update to bpf.c: Prior to the update an > armv7 system had been inclined to drop ssh connections left up for = days. > After updating and running a build/install cycle the behavior = persisted, > but since a second reboot with no intentional changes it has stopped. The most recent change to bpf.c is 7a974a649848 (bpf: Make dead_bpf_if = const) . It is not a functional change, and I do not think it will affect ssh. There could be issues under the earth. Anyway please do not hesitate to report if you get recovered by = reverting 7a974a649848. >=20 > I've not tampered with nextboot, so I don't think that's it. Maybe I'm > just imagining imagining things....=20 >=20 > Thanks for reading, >=20 > bob prohaska >=20 >=20 Best regards, Zhenlei