From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E2C46348468 for ; Thu, 20 Nov 2025 22:04:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763676287; cv=none; b=bWkBAByihsS2XPHR4oL08OYe5OmN13uVXYjfjZGG1R4irIvVaqpK9HprqZgRs/d/e5ZzmQbF7eu/4N0Q4EI5PwriLVeZU2FDKI0oLVd3R5FgRuGSQ2LYv+9Upl6ilnlsKDZRA+GjyvcixOrrFqF055xyyR1KUDuebZb9jwH1ehI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763676287; c=relaxed/simple; bh=ClX1TFupdeOsD5djPb+2bpaaMykt83lSQmeXvmTVbv8=; h=Date:To:From:Subject:Message-Id; b=IDbOhJAsJmU7sga6Qnkt/swM0wX+bSwSBGp9oKGIHCoPm33BDTma80ZLFSMUzQwRbGE4ZKUGUVP/p5lAw3rShgvl5IHsaIgn0VHTOSJFm4gXJ6Z0SdQ70yffnBqsR3Ngssxz3dNX2D2UDVTBurjaj9wL1k55h2FLhlc9gIIuP0s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=Hw9K0Bie; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="Hw9K0Bie" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7ED3BC113D0; Thu, 20 Nov 2025 22:04:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1763676286; bh=ClX1TFupdeOsD5djPb+2bpaaMykt83lSQmeXvmTVbv8=; h=Date:To:From:Subject:From; b=Hw9K0BieiwWuARtw1+VebTLRFf0wn9BqMLtaDt/Ac1+aI2FNGBM2H78iAxMIVLGBt rwOwNFeJFnk70bnU/aTaMmgztBvYiSt8E236tqiz86AXBgQIaeHlqBGmH+VnaS6g/9 zIkzAen9p0l4GOub0/w/wohHqFUQPNLcYL2puUy0= Date: Thu, 20 Nov 2025 14:04:45 -0800 To: mm-commits@vger.kernel.org,rostedt@goodmis.org,pmladek@suse.com,paulmck@kernel.org,ioworker0@gmail.com,corbet@lwn.net,akpm@linux-foundation.org,feng.tang@linux.alibaba.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-nonmm-stable] sys_info-add-a-default-kernel-sys_info-mask.patch removed from -mm tree Message-Id: <20251120220446.7ED3BC113D0@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: sys_info: add a default kernel sys_info mask has been removed from the -mm tree. Its filename was sys_info-add-a-default-kernel-sys_info-mask.patch This patch was dropped because it was merged into the mm-nonmm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Feng Tang Subject: sys_info: add a default kernel sys_info mask Date: Thu, 13 Nov 2025 19:10:39 +0800 Which serves as a global default sys_info mask. When users want the same system information for many error cases (panic, hung, lockup ...), they can chose to set this global knob only once, while not setting up each individual sys_info knobs. This just adds a 'lazy' option, and doesn't change existing kernel behavior as the mask is 0 by default. Link: https://lkml.kernel.org/r/20251113111039.22701-5-feng.tang@linux.alibaba.com Suggested-by: Andrew Morton Signed-off-by: Feng Tang Cc: Jonathan Corbet Cc: Lance Yang Cc: "Paul E . McKenney" Cc: Petr Mladek Cc: Steven Rostedt Signed-off-by: Andrew Morton --- Documentation/admin-guide/sysctl/kernel.rst | 9 +++++ lib/sys_info.c | 31 +++++++++++++++++- 2 files changed, 39 insertions(+), 1 deletion(-) --- a/Documentation/admin-guide/sysctl/kernel.rst~sys_info-add-a-default-kernel-sys_info-mask +++ a/Documentation/admin-guide/sysctl/kernel.rst @@ -521,6 +521,15 @@ default), only processes with the CAP_SY io_uring instances. +kernel_sys_info +=============== +A comma separated list of extra system information to be dumped when +soft/hard lockup is detected, for example, "tasks,mem,timers,locks,...". +Refer 'panic_sys_info' section below for more details. + +It serves as the default kernel control knob, which will take effect +when a kernel module calls sys_info() with parameter==0. + kexec_load_disabled =================== --- a/lib/sys_info.c~sys_info-add-a-default-kernel-sys_info-mask +++ a/lib/sys_info.c @@ -24,6 +24,13 @@ static const char * const si_names[] = { [ilog2(SYS_INFO_BLOCKED_TASKS)] = "blocked_tasks", }; +/* + * Default kernel sys_info mask. + * If a kernel module calls sys_info() with "parameter == 0", then + * this mask will be used. + */ +static unsigned long kernel_si_mask; + /* Expecting string like "xxx_sys_info=tasks,mem,timers,locks,ftrace,..." */ unsigned long sys_info_parse_param(char *str) { @@ -110,9 +117,26 @@ int sysctl_sys_info_handler(const struct else return sys_info_read_handler(&table, buffer, lenp, ppos, ro_table->data); } + +static const struct ctl_table sys_info_sysctls[] = { + { + .procname = "kernel_sys_info", + .data = &kernel_si_mask, + .maxlen = sizeof(kernel_si_mask), + .mode = 0644, + .proc_handler = sysctl_sys_info_handler, + }, +}; + +static int __init sys_info_sysctl_init(void) +{ + register_sysctl_init("kernel", sys_info_sysctls); + return 0; +} +subsys_initcall(sys_info_sysctl_init); #endif -void sys_info(unsigned long si_mask) +static void __sys_info(unsigned long si_mask) { if (si_mask & SYS_INFO_TASKS) show_state(); @@ -135,3 +159,8 @@ void sys_info(unsigned long si_mask) if (si_mask & SYS_INFO_BLOCKED_TASKS) show_state_filter(TASK_UNINTERRUPTIBLE); } + +void sys_info(unsigned long si_mask) +{ + __sys_info(si_mask ? : kernel_si_mask); +} _ Patches currently in -mm which might be from feng.tang@linux.alibaba.com are