From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3744C6369B for ; Wed, 26 Jan 2022 13:45:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241274AbiAZNpf (ORCPT ); Wed, 26 Jan 2022 08:45:35 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:58226 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235305AbiAZNpe (ORCPT ); Wed, 26 Jan 2022 08:45:34 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7CE77B81E0F; Wed, 26 Jan 2022 13:45:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A9195C340E3; Wed, 26 Jan 2022 13:45:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643204731; bh=aXQde9wq7cWvdCRLRrI1FIQr3++bEQ4exG2q/lhqD3E=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=v+g8gUQjIt/c0ktBUQcit03sTj8G5mLw8FT+LXQqudlxh2iXfgafDrgsKIgJcd+6A KW7BP0Pf7wtiKC9gzDKJw1Q0VKMx5apmABXH/60JK3d2VK/Sw93FHWeCcfYpb1QPrC cxProUa3b1FFVLRT4j2tOajkb4EpxDNqSymszfjw= Date: Wed, 26 Jan 2022 14:45:28 +0100 From: Greg KH To: Walt Drummond Cc: agordeev@linux.ibm.com, arnd@arndb.de, benh@kernel.crashing.org, borntraeger@linux.ibm.com, chris@zankel.net, davem@davemloft.net, hca@linux.ibm.com, deller@gmx.de, ink@jurassic.park.msu.ru, James.Bottomley@hansenpartnership.com, jirislaby@kernel.org, mattst88@gmail.com, jcmvbkbc@gmail.com, mpe@ellerman.id.au, paulus@samba.org, rth@twiddle.net, dalias@libc.org, tsbogend@alpha.franken.de, gor@linux.ibm.com, ysato@users.osdn.me, linux-kernel@vger.kernel.org, ar@cs.msu.ru, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, sparclinux@vger.kernel.org Subject: Re: [PATCH 0/3] status: TTY status message request Message-ID: References: <20220118044259.764945-1-walt@drummond.us> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220118044259.764945-1-walt@drummond.us> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 17, 2022 at 08:42:57PM -0800, Walt Drummond wrote: > This patchset adds TTY status message request feature to the n_tty > line dicipline. This feature prints a brief message containing basic > system and process group information to a user's TTY in response to a > new control character in the line dicipline (default Ctrl-T) or the > TIOCSTAT ioctl. The message contains the current system load, the > name and PID of an interesting process in the forground process group, > it's run time, percent CPU usage and RSS. An example of this message > is: > > load: 0.31 cmd: sleep 3616843 [sleeping] 0.36r 0.00u 0.00s 0% 696k > > User API visible changes are limited to: > - The addition of VSTATUS in termios.c_cc[] > - The addition of NOKERNINFO bit in termios.l_cflags > - The addition of the TIOCSTAT ioctl number > > None of these changes break the existing kernel api as the termios > structure on all architectures has enough space in the control > character array (.c_cc) for the new character, and the other changes > are space agnostic. > > This feature is in many other Unix-like systems, both current and > historical. In other implementations, this feature would also send > SIGINFO to the process group; this implementation does not. > > Walt Drummond (3): > vstatus: Allow the n_tty line dicipline to write to a user tty > vstatus: Add user space API definitions for VSTATUS, NOKERNINFO and > TIOCSTAT > status: Display an informational message when the VSTATUS character is > pressed or TIOCSTAT ioctl is called. > > arch/alpha/include/asm/termios.h | 4 +- > arch/alpha/include/uapi/asm/ioctls.h | 1 + > arch/alpha/include/uapi/asm/termbits.h | 34 ++--- > arch/ia64/include/asm/termios.h | 4 +- > arch/ia64/include/uapi/asm/termbits.h | 34 ++--- > arch/mips/include/asm/termios.h | 4 +- > arch/mips/include/uapi/asm/ioctls.h | 1 + > arch/mips/include/uapi/asm/termbits.h | 36 ++--- > arch/parisc/include/asm/termios.h | 4 +- > arch/parisc/include/uapi/asm/ioctls.h | 1 + > arch/parisc/include/uapi/asm/termbits.h | 34 ++--- > arch/powerpc/include/asm/termios.h | 4 +- > arch/powerpc/include/uapi/asm/ioctls.h | 2 + > arch/powerpc/include/uapi/asm/termbits.h | 34 ++--- > arch/s390/include/asm/termios.h | 4 +- > arch/sh/include/uapi/asm/ioctls.h | 1 + > arch/sparc/include/uapi/asm/ioctls.h | 1 + > arch/sparc/include/uapi/asm/termbits.h | 38 +++--- > arch/xtensa/include/uapi/asm/ioctls.h | 1 + > drivers/tty/Makefile | 2 +- > drivers/tty/n_tty.c | 113 +++++++++++----- > drivers/tty/n_tty_status.c | 162 +++++++++++++++++++++++ > drivers/tty/tty_io.c | 2 +- > include/asm-generic/termios.h | 4 +- > include/linux/tty.h | 123 ++++++++--------- > include/uapi/asm-generic/ioctls.h | 1 + > include/uapi/asm-generic/termbits.h | 34 ++--- > 27 files changed, 461 insertions(+), 222 deletions(-) > create mode 100644 drivers/tty/n_tty_status.c > > -- > 2.30.2 > You forgot to cc: me on patch 2/3, which would be needed if I was to take them all. Please fix up patch 2 and resend the whole series. thanks, greg k-h