From nobody Thu May 20 16:01:55 2021 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 370FE8B68A5 for ; Thu, 20 May 2021 16:02:16 +0000 (UTC) (envelope-from freebsd@grem.de) Received: from mail.evolve.de (mail.evolve.de [213.239.217.29]) (using TLSv1.3 with cipher TLS_CHACHA20_POLY1305_SHA256 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA512 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mail.evolve.de", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FmDyZ6kQWz4vm8 for ; Thu, 20 May 2021 16:02:14 +0000 (UTC) (envelope-from freebsd@grem.de) Received: by mail.evolve.de (OpenSMTPD) with ESMTP id 0daa3fa4 for ; Thu, 20 May 2021 16:02:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=grem.de; h=date:from:to :subject:message-id:mime-version:content-type :content-transfer-encoding; s=20180501; bh=xZy3kPRk4qw5Pixy9cWPL NSjLmw=; b=BwrBgahfPtN6yU93O0qoXF6BQa9mDNu+myEoekUuu2qMKF5ndeSYX Dq3SbWfZu4ztRff1OiQCch+XqcS30fPPVlv/dwbij4GqhVhxBMDUmkk2WI3+X0PH FHyv0O3X6vkZWzVl6NruuwCbPhJeP+cST5Y63kL4zWFO7idCMxVVJQcA7gOHoBjD HSk1QQzUDTqkdy4E5sXvQXjwKKnek6Zb28GGcsSTdkPRVmeSfygogxQ73u7Ff2ej /NVf8/o9PH9PIxxO/IHVhthHqDhPMm22RmFywuCwdBwbNmyxx+oKSmtCc1d/yeH4 0Wj7+lPZ+FAgHPQ+LU2h9Yh0bGINFvFew== DomainKey-Signature: a=rsa-sha1; c=nofws; d=grem.de; h=date:from:to :subject:message-id:mime-version:content-type :content-transfer-encoding; q=dns; s=20180501; b=KxGG8WUHNqmsrEV 196ucf7r06r/o8+XIX0yzdYmXCs21Q5HLbSoTMGsz8mnt0SrAKnrs4JUaRotrek7 mSRvIQ3UBa8Lji4JccsxgOp0oryFepjd0zokLTV7MbC5G0qM9I92NYdZx4KlU7y9 FUpan3ZVCUQtFibz/ENcgP5LGnDckCv/rvVFBVIrKRnXjK9tkLzjDP7e2f4vJVD9 qzuVPkEBNj31FDl1lZ26qUlmKaIy/6ZDeaasbTDXSNXmFWieJLf/1PjT0VL5mz+J SEa3pZTwMdih50J6ZhhnLTL2euKEgy6Sut8puP+poiU2lLSTTIURcuSHhwa8Vjzs rEpR8rQ== Received: by mail.evolve.de (OpenSMTPD) with ESMTPSA id 1e551a90 (TLSv1.3:AEAD-CHACHA20-POLY1305-SHA256:256:NO) for ; Thu, 20 May 2021 16:02:05 +0000 (UTC) Date: Thu, 20 May 2021 18:01:55 +0200 From: Michael Gmelin To: "freebsd-current@freebsd.org" Subject: Reducing SIGINFO verbosity Message-ID: <20210520180155.3e23500e@bsd64.grem.de> 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= 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 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4FmDyZ6kQWz4vm8 X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=grem.de header.s=20180501 header.b=BwrBgahf; 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 [-3.50 / 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)[-1.000]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:213.239.217.29/32]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; DMARC_NA(0.00)[grem.de]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[213.239.217.29:from:127.0.2.255]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[grem.de:+]; NEURAL_HAM_SHORT(-1.00)[-1.000]; TO_DN_EQ_ADDR_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[213.239.217.29:from]; ASN(0.00)[asn:24940, ipnet:213.239.192.0/18, country:DE]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-current] Hi, I'm leaving this here, mostly so that others (or future me) can google it up. Traditionally, CTRL-t would give a one-line output + whatever the process specific signal handler comes up with: # sleep 120 <--- hits CTRL-t load: 0.27 cmd: sleep 38162 [nanslp] 0.64r 0.00u 0.00s 0% 1780k sleep: about 119 second(s) left out of the original 120 # cat <--- hits CTRL-t load: 0.02 cmd: cat 24379 [ttyin] 0.63r 0.00u 0.00s 0% 2308k On 13 I get: # sleep 120 <--- hits CTRL-t load: 0.12 cmd: sleep 3241 [nanslp] 0.52r 0.00u 0.00s 0% 2172k mi_switch+0xc1 sleepq_catch_signals+0x2e6 sleepq_timedwait_sig+0x12 _sleep+0x199 kern_clock_nanosleep+0x1e1 sys_nanosleep+0x3b amd64_syscall+0x10c fast_syscall_common+0xf8 sleep: about 119 second(s) left out of the original 120 # cat <--- hits CTRL-t load: 0.09 cmd: cat 3240 [ttyin] 0.23r 0.00u 0.00s 0% 2300k mi_switch+0xc1 sleepq_catch_signals+0x2e6 sleepq_wait_sig+0x9 _cv_wait_sig+0xe4 tty_wait+0x1c ttydisc_read+0x2ac ttydev_read+0x56 devfs_read_f+0xd5 dofileread+0x81 sys_read+0xbc amd64_syscall+0x10c fast_syscall_common+0xf8 which is quite way too verbose when checking the progress of long-running processes, like cp, dd, or poudriere. Especially as CTRL-t is part of the user experience to me - I use it to interact with the machine outside of debugging software issues. Setting sysctl kern.tty_info_kstacks=0 echo kern.tty_info_kstacks=0 >>/etc/sysctl.conf fixes this permanently. Apparently, this was enabled by default on purpose[0], so that people find the feature (which certainly worked ^_^), but I think it would been worth mentioning the sysctl somewhere in the release notes/errata, so that people understand how to disable it again. Best Michael [0]https://cgit.freebsd.org/src/commit/sys/kern/tty_info.c?h=releng/13.0&id=508a6e84e785f642545b81c3ecb325685a2e56a7 -- Michael Gmelin