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Tue, 25 Apr 2023 06:06:19 -0700 (PDT) Received: from localhost ([2620:10d:c092:500::5:530d]) by smtp.gmail.com with ESMTPSA id k2-20020a056402048200b00501c96564b5sm5425186edv.93.2023.04.25.06.06.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Apr 2023 06:06:19 -0700 (PDT) Date: Tue, 25 Apr 2023 14:06:19 +0100 From: Chris Down To: linux-kernel@vger.kernel.org Cc: Petr Mladek , Greg Kroah-Hartman , Sergey Senozhatsky , Steven Rostedt , John Ogness , Geert Uytterhoeven , kernel-team@fb.com Subject: [PATCH v5 0/2] printk: console: Per-console loglevels Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/2.2.10 (2023-03-25) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org v5: - Fix syntax in boot_delay v4: - Change base to Linus' master - Use SRCU iterators for console walks - Override per-console loglevels on magic sysrq - Fix htmldocs - Fix mistaken __user annotation in sysctl callbacks - Consistently use indexed names (eg. ttyS0 instead of ttyS) - Remove "The loglevel for a console can be set in many places" comment - Remove CON_LOGLEVEL flag and infer based on >0 - Open code our dev_get_drvdata console stashing - Split out console_effective_loglevel functions per Petr's suggestion - Make boot_delay_msec/printk_delay check if it would be emitted - Simplify warning on SYSLOG_ACTION_CONSOLE_LEVEL - Save/restore ignore_per_console_loglevel on SYSLOG_ACTION_CONSOLE_{ON,OFF} - Unify min/max level checks across sysfs/proc/syslog - Add find_and_remove_console_option to avoid affecting io/mmio options v3: - Update to work with John's kthread patches - Remove force_console_loglevel, now we only have global and local levels - Remove minimum_console_loglevel control and document how to change it - The minimum loglevel is now only honoured on setting global/local level - Add ignore_per_console_loglevel - Return -EINVAL if trying to set below minimum console level - Add parser for named console= options - Fix docs around ignore_loglevel: it can be changed at runtime - Fix ordering in "in order of authority" docs - Remove duplicated default_console_loglevel doc - Only warn once on syslog() use v2: - Dynamically allocate struct device* - Document sysfs attributes in Documentation/ABI/ - Use sysfs_emit() instead of sprintf() in dev sysfs files - Remove WARN_ON() for device_add/IS_ERR(console_class) - Remove "soon" comment for kernel.printk - Fix !CONFIG_PRINTK build - Fix device_unregister() NULL dereference if called before class setup - Add new documentation to MAINTAINERS Chris Down (2): printk: Do not delay messages which aren't solicited by any console printk: console: Support console-specific loglevels Documentation/ABI/testing/sysfs-class-console | 47 ++ Documentation/admin-guide/index.rst | 1 + .../admin-guide/kernel-parameters.txt | 28 +- .../admin-guide/per-console-loglevel.rst | 92 ++++ Documentation/admin-guide/serial-console.rst | 17 +- Documentation/core-api/printk-basics.rst | 35 +- Documentation/networking/netconsole.rst | 17 + MAINTAINERS | 3 + drivers/tty/sysrq.c | 15 + include/linux/console.h | 3 + include/linux/printk.h | 9 + kernel/printk/console_cmdline.h | 2 + kernel/printk/printk.c | 417 +++++++++++++++++- kernel/printk/sysctl.c | 57 ++- 14 files changed, 692 insertions(+), 51 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-class-console create mode 100644 Documentation/admin-guide/per-console-loglevel.rst base-commit: 61d325dcbc05d8fef88110d35ef7776f3ac3f68b -- 2.40.0