From owner-freebsd-current@freebsd.org Sat Jun 27 14:50:23 2020 Return-Path: Delivered-To: freebsd-current@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2F2D8353228 for ; Sat, 27 Jun 2020 14:50:23 +0000 (UTC) (envelope-from freebsd@grem.de) Received: from mail.evolve.de (mail.evolve.de [213.239.217.29]) (using TLSv1.2 with cipher ECDHE-RSA-CHACHA20-POLY1305 (256/256 bits)) (Client CN "mail.evolve.de", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49vGrW653lz42Fj; Sat, 27 Jun 2020 14:50:19 +0000 (UTC) (envelope-from freebsd@grem.de) Received: by mail.evolve.de (OpenSMTPD) with ESMTP id b1423702; Sat, 27 Jun 2020 14:50:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=grem.de; h=date:from:to:cc :subject:message-id:in-reply-to:references:mime-version :content-type:content-transfer-encoding; s=20180501; bh=vMgQxQt6 P4bwy4fRHC49oxMm8bg=; b=LUVduTV2hgFsV5om785z8sp3SrfF7M58OxYn/ivE 4snJQdhee9hrlOj1UVkXJvufotCWaw2WW5+9V1wRdifukcaZjOZU3J6mAi97dZhx oh99liNeFrdjwxBQNHmfUJTnRgx5lJ6XBF7bFY4BfOAxSYdjSfI4+ZnlL2+szN/b zRw2FawumDNxlfYK2UUTFBy2ORnakDGct5eD/gfNkZx/m7A+TUSMQb/r6gUVrLqJ /rf+0uzLmg5Xgw+14dZW+e3EgUhEQrWEM7Hfq0wovqUA0uXFOdl/H3dH2R1MOebb tYHF/9U6VvKlaINIDl49qfHLnwyKIiMxwjCeJI2wpmBjGg== DomainKey-Signature: a=rsa-sha1; c=nofws; d=grem.de; h=date:from:to:cc :subject:message-id:in-reply-to:references:mime-version :content-type:content-transfer-encoding; q=dns; s=20180501; b=dg csQ+TYrNwLHquA/RVjI0kuVK9xuF3riMkcFsE15aSwzvB3llCSqp64sKV0B51V1X 6iAXC5hEAluyYH5ylVM6WO2GaBVxPlJu3KkgpFkkgu3Gv5XjV8FWedOZQvl7Blsq 6726tZiJTUb0zgwD3I+uKWu7tjxwsPmryk5HJ3FEj0rkPif67h+EoAKVsmZgnJMN T1LfmTCb28TzN2hyQX+BtOpTkPeXY3WwKX5ApO3GCdNws1IIzUbLYIGGMkUV/xbe gwXgKye3bMnNqj5ya/snlIKBL/h543H0kA/mW8cXGSmT0GBQTEb6Ep15n9xDrWfN JdA5ULfRenR25Wb/t7VQ== Received: by mail.evolve.de (OpenSMTPD) with ESMTPSA id b3afe7a8 (TLSv1.2:ECDHE-RSA-CHACHA20-POLY1305:256:NO); Sat, 27 Jun 2020 14:50:12 +0000 (UTC) Date: Sat, 27 Jun 2020 16:49:59 +0200 From: Michael Gmelin To: John Baldwin Cc: Michael Gmelin , Andriy Gapon , Li-Wen Hsu , "Conrad E. Meyer" , FreeBSD CURRENT Subject: Re: weird Ctrl-T debug messages Message-ID: <20200627164959.15752fb2@bsd64.grem.de> In-Reply-To: <61989d05-324a-0b8d-d0cf-0da5f3d9f00d@FreeBSD.org> References: <20200627090406.68b5d637@hermann.fritz.box> <14d1708f-74cc-4a60-3282-3308eb24743e@FreeBSD.org> <20200627115910.4fe32aa6@bsd64.grem.de> <61989d05-324a-0b8d-d0cf-0da5f3d9f00d@FreeBSD.org> X-Face: $wrgCtfdVw_H9WAY?S&9+/F"!41z'L$uo*WzT8miX?kZ~W~Lr5W7v?j0Sde\mwB&/ypo^}> +a'4xMc^^KroE~+v^&^#[B">soBo1y6(TW6#UZiC]o>C6`ej+i Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAAJFBMVEWJBwe5BQDl LASZU0/LTEWEfHbyj0Txi32+sKrp1Mv944X8/fm1rS+cAAAACXBIWXMAAAsTAAAL EwEAmpwYAAAAB3RJTUUH3wESCxwC7OBhbgAAACFpVFh0Q29tbWVudAAAAAAAQ3Jl YXRlZCB3aXRoIFRoZSBHSU1QbbCXAAAAAghJREFUOMu11DFvEzEUAGCfEhBVFzuq AKkLd0O6VrIQsLXVSZXoWE5N1K3DobBBA9fQpRWc8OkWouaIjedWKiyREOKs+3PY fvalCNjgLVHeF7/3bMtBzV8C/VsQ8tecEgCcDgrzjekwKZ7TwsJZd/ywEKwwP+ZM 8P3drTsAwWn2mpWuDDuYiK1bFs6De0KUUFw0tWxm+D4AIhuuvZqtyWYeO7jQ4Aea 7jUqI+ixhQoHex4WshEvSXdood7stlv4oSuFOC4tqGcr0NjEqXgV4mMJO38nld4+ xKNxRDon7khyKVqY7YR4d+Cg0OMrkWXZOM7YDkEfKiilCn1qYv4mighZiynuHHOA Wq9QJq+BIES7lMFUtcikMnkDGHUoncA+uHgrP0ctIEqfwLHzeSo+eUA66AqzwN6n 2ZHJhw6Qh/PoyC/QENyEyC/AyNjq74Bs+3UH0xYwzDUC4B97HgLocg1QLYgDDO1v f3UX9Y307Ew4AHh67YAFFsxEpkXwpXY3eIgMhAAE3R19L919nNnuD2wlPcDE3UeT L2ytEICQib9BXgS2fU8PrD82ToYO1OEmMSnYTjSqSv9wdC0tPYC+rQRQD9ESnldF CyqfmiYW+tlALt8gH2xrMdC/youbjzPXEun+/ReXsMCDyve3dZc09fn2Oas8oXGc Jj6/fOeK5UmSMPmf/jL+GD8BEj0k/Fn6IO4AAAAASUVORK5CYII= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 49vGrW653lz42Fj X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=grem.de header.s=20180501 header.b=LUVduTV2; dmarc=none; spf=pass (mx1.freebsd.org: domain of freebsd@grem.de designates 213.239.217.29 as permitted sender) smtp.mailfrom=freebsd@grem.de X-Spamd-Result: default: False [-2.69 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[grem.de:s=20180501]; NEURAL_HAM_MEDIUM(-1.00)[-0.996]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:213.239.217.29/32]; NEURAL_HAM_LONG(-0.98)[-0.976]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grem.de]; RCPT_COUNT_FIVE(0.00)[6]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[grem.de:+]; NEURAL_HAM_SHORT(-0.22)[-0.222]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:213.239.192.0/18, country:DE]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Jun 2020 14:50:23 -0000 On Sat, 27 Jun 2020 06:21:17 -0700 John Baldwin wrote: > On 6/27/20 2:59 AM, Michael Gmelin wrote: > > > > > > On Sat, 27 Jun 2020 12:06:17 +0300 > > Andriy Gapon wrote: > > > >> On 27/06/2020 10:44, Li-Wen Hsu wrote: > >>> On Sat, Jun 27, 2020 at 3:04 PM Hartmann, O. > >>> wrote: > >>>> > >>>> Running poudriere on recent CURRENT with (recent) 12-STABLE and > >>>> CURRENT jails reveals a weird behaviour recently when hitting > >>>> Ctrl-T: > >>> ... > >>>> Is this debug fallout from /bin/sh? > >>> > >>> It's because kern.tty_info_kstacks is on by default now: > >>> > >>> https://svnweb.freebsd.org/changeset/base/362141 > >> > >> May I suggest that the stack trace is printed procstat -kk style > >> (single line) ? I think that the more compact output would be more > >> convenient. > > > > It's a cool feature and having it on by default on CURRENT certainly > > helps to discover it, which is great. Thanks for implementing this! > > > > I wouldn't enable it by default on RELEASE versions though, as > > CTRL-T is a user interface to get status information (at least this > > is how I use it personally, e.g., while running commands like > > dd[0], cp, mv, poudriere etc.), not for getting debug output. > > I agree with this. > > > Question: Speaking of discovering the feature, wouldn't it make > > sense to document this tunable on the stack(9) and/or tty(4) man > > page(s)? > > This sounds like a great idea. Would you able to come up with a > patch? I'd be happy to review it. Sure, it actually seems like that termios(4) is the best place to put this information. https://reviews.freebsd.org/D25488 Best, Michael -- Michael Gmelin