From nobody Sat May 07 15:34:36 2022 X-Original-To: dev-commits-src-main@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 10DF41ABE159; Sat, 7 May 2022 15:34:37 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (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 "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4KwWhD5QwBz3r7l; Sat, 7 May 2022 15:34:36 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1651937676; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=UTIc9rVW2mkbiy8fh5ZpgVnznaFRF3lntEOQU9CPPHY=; b=qc4ppti83GA3BAb2Z/t8Gc8JPMlE1GJTNHPzKzhMROSBK3pfDPigAZkbTtYvsvF9k0lEZH gA4oqp/HIeIG7O7PJxj8Ur60WFOxlnPdv7j9PlwjF4ufovyauCecWCUD+hMD4XH2u/DgRW VZvoQttY7Dngk7mO/d6B8+g15DuyDuN1urBG5kAJ0cNAnLeNsJ8KQnO06M2LZwS3sZWPPT 55X6hwmUjpakDx08b8m0JOySU7oIxOiPhV2tcsNum8vsJJeyraVS2uAXGV9jm52fevXbXC 6Pkc4/kayWqfWrI4XLg6Ei1MEt2yR2lizyPcSxByttha1WflsrKllq/S1cmEjA== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 8C3C313431; Sat, 7 May 2022 15:34:36 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 247FYaDW087901; Sat, 7 May 2022 15:34:36 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 247FYajo087900; Sat, 7 May 2022 15:34:36 GMT (envelope-from git) Date: Sat, 7 May 2022 15:34:36 GMT Message-Id: <202205071534.247FYajo087900@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Warner Losh Subject: git: 6910fee62e77 - main - dmesg: Document kern.msgbuf_show_timestamp List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-main@freebsd.org X-BeenThere: dev-commits-src-main@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: imp X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 6910fee62e77afecbaff3be0ff922a34e85a9881 Auto-Submitted: auto-generated ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1651937676; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=UTIc9rVW2mkbiy8fh5ZpgVnznaFRF3lntEOQU9CPPHY=; b=vhsBgW8kw2cBW2iox+DU2Ak1alUYdTN09JsUpENIiqu88u71aGU1jGl1Z/nkCvxJH3kxnm HDiuponNEsalUY906QCNxvR5ULLzQ2MRAcbucMCPSjHapsbXK/ptJM3g+zL1+St03ZC41H KYlKJWjmkvwaQi6DqyLV8cDaekZb52l70lOTi4cuj86uvz2uQeYsL3m6F3CUWAPd09uxmC 2mC0Net8TukC0Cn6hYXikc/lIr1XyhgPYn12Shs7rkOvzOybNRyA/f32Oz05UtZwM/dDps VgyU/6knx0NEqkOygBM/WuC/n8Yb1vvFvk+6yFk76vYNMB5yI5JR4G5o+egrWA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1651937676; a=rsa-sha256; cv=none; b=JPYb22aVdPb2yfsS/awFlOfgkSful8W6ru+f3zAnB7ioqtln8lcjaHh9i4ObdmlBOgrM7I qP9iaT3bUVtQ/ifzqar78L3btRz7nF2Y42GGRPKXynx9zumedBHtlStyzMnxHLIBDQZ9cm e5knyKh5ObXjxbDfLJLWFh0erJS/qFnTclmIVJu65REolXdZmqGe8EGUCPpfR3BJPVA31b vjObeLO9IMNkh7nLfnOZS9TS90HfsDDhswsHrREwLo2Gw8tF1ee0j64+f+lzY7ovf/nv/T Pbsthv7sJ7Jy9bQ+KtXOVMj/jVKSWj5/ZqBwBtlke0rpI9siuvHBDkkAmDiZqQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=6910fee62e77afecbaff3be0ff922a34e85a9881 commit 6910fee62e77afecbaff3be0ff922a34e85a9881 Author: Warner Losh AuthorDate: 2022-05-06 16:32:10 +0000 Commit: Warner Losh CommitDate: 2022-05-07 15:32:21 +0000 dmesg: Document kern.msgbuf_show_timestamp kern.msgbuf_show_timestamp=1 turns on timestamps in kernel's message buffer which dmesg(8) prints. Sponsored by: Netflix --- sbin/dmesg/dmesg.8 | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/sbin/dmesg/dmesg.8 b/sbin/dmesg/dmesg.8 index e40d8d5c9ff7..13101baf7e78 100644 --- a/sbin/dmesg/dmesg.8 +++ b/sbin/dmesg/dmesg.8 @@ -28,7 +28,7 @@ .\" @(#)dmesg.8 8.1 (Berkeley) 6/5/93 .\" $FreeBSD$ .\" -.Dd October 3, 2016 +.Dd May 6, 2022 .Dt DMESG 8 .Os .Sh NAME @@ -70,6 +70,19 @@ is also specified, extract the name list from the specified system instead of the default, which is the kernel image the system has booted from. .El +.Sh SYSCTL VARIABLES +The following +.Xr sysctl 8 +variables can be used to control the behavior of the kernel's placing data into +the message buffer: +The default value is shown next to each variable. +.Bl -tag -width indent +.It kern.msgbuf_show_timestamp : No 0 +If set to 1, then a timestamp will be added to most lines in the message buffer. +This may also be set as a boot +.Xr loader 8 +tunable. +.El .Sh FILES .Bl -tag -width ".Pa /var/run/dmesg.boot" -compact .It Pa /var/run/dmesg.boot