From: Andrew Morton <akpm@linux-foundation.org>
To: adobriyan@gmail.com, akpm@linux-foundation.org,
christian.brauner@ubuntu.com, ebiederm@xmission.com,
gpiccoli@canonical.com, gregkh@linuxfoundation.org,
ivan.teterevkov@nutanix.com, keescook@chromium.org,
linux-mm@kvack.org, mcgrof@kernel.org, mhiramat@kernel.org,
mhocko@kernel.org, mhocko@suse.com, mm-commits@vger.kernel.org,
rientjes@google.com, tglx@linutronix.de,
torvalds@linux-foundation.org, vbabka@suse.cz,
willy@infradead.org, yzaikin@google.com
Subject: [patch 09/54] kernel/hung_task convert hung_task_panic boot parameter to sysctl
Date: Sun, 07 Jun 2020 21:40:31 -0700 [thread overview]
Message-ID: <20200608044031.nggr6xU6_%akpm@linux-foundation.org> (raw)
In-Reply-To: <20200607212615.b050e41fac139a1e16fe00bd@linux-foundation.org>
From: Vlastimil Babka <vbabka@suse.cz>
Subject: kernel/hung_task convert hung_task_panic boot parameter to sysctl
We can now handle sysctl parameters on kernel command line and have
infrastructure to convert legacy command line options that duplicate
sysctl to become a sysctl alias.
This patch converts the hung_task_panic parameter. Note that the sysctl
handler is more strict and allows only 0 and 1, while the legacy parameter
allowed any non-zero value. But there is little reason anyone would not
be using 1.
Link: http://lkml.kernel.org/r/20200427180433.7029-4-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Guilherme G . Piccoli" <gpiccoli@canonical.com>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Ivan Teterevkov <ivan.teterevkov@nutanix.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
Documentation/admin-guide/kernel-parameters.txt | 2 +-
fs/proc/proc_sysctl.c | 1 +
kernel/hung_task.c | 10 ----------
3 files changed, 2 insertions(+), 11 deletions(-)
--- a/Documentation/admin-guide/kernel-parameters.txt~kernel-hung_task-convert-hung_task_panic-boot-parameter-to-sysctl
+++ a/Documentation/admin-guide/kernel-parameters.txt
@@ -1515,7 +1515,7 @@
[KNL] Should the hung task detector generate panics.
Format: <integer>
- A nonzero value instructs the kernel to panic when a
+ A value of 1 instructs the kernel to panic when a
hung task is detected. The default value is controlled
by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time
option. The value selected by this boot parameter can
--- a/fs/proc/proc_sysctl.c~kernel-hung_task-convert-hung_task_panic-boot-parameter-to-sysctl
+++ a/fs/proc/proc_sysctl.c
@@ -1721,6 +1721,7 @@ struct sysctl_alias {
*/
static const struct sysctl_alias sysctl_aliases[] = {
{"numa_zonelist_order", "vm.numa_zonelist_order" },
+ {"hung_task_panic", "kernel.hung_task_panic" },
{ }
};
--- a/kernel/hung_task.c~kernel-hung_task-convert-hung_task_panic-boot-parameter-to-sysctl
+++ a/kernel/hung_task.c
@@ -63,16 +63,6 @@ static struct task_struct *watchdog_task
unsigned int __read_mostly sysctl_hung_task_panic =
CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE;
-static int __init hung_task_panic_setup(char *str)
-{
- int rc = kstrtouint(str, 0, &sysctl_hung_task_panic);
-
- if (rc)
- return rc;
- return 1;
-}
-__setup("hung_task_panic=", hung_task_panic_setup);
-
static int
hung_task_panic(struct notifier_block *this, unsigned long event, void *ptr)
{
_
next prev parent reply other threads:[~2020-06-08 4:40 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200607212615.b050e41fac139a1e16fe00bd@linux-foundation.org>
2020-06-08 4:40 ` [patch 01/54] mm/page_idle.c: skip offline pages Andrew Morton
2020-06-08 4:40 ` [patch 02/54] ipc/msg: add missing annotation for freeque() Andrew Morton
2020-06-08 4:40 ` [patch 03/54] ipc/namespace.c: use a work queue to free_ipc Andrew Morton
2020-06-08 4:40 ` [patch 04/54] dynamic_debug: add an option to enable dynamic debug for modules only Andrew Morton
2020-06-08 4:58 ` 答复: " 翟京 (Orson Zhai)
2020-06-08 4:40 ` [patch 05/54] kernel: add panic_on_taint Andrew Morton
2020-06-08 4:40 ` [patch 06/54] xarray.h: correct return code documentation for xa_store_{bh,irq}() Andrew Morton
2020-06-08 4:40 ` [patch 07/54] kernel/sysctl: support setting sysctl parameters from kernel command line Andrew Morton
2020-06-08 4:40 ` [patch 08/54] kernel/sysctl: support handling command line aliases Andrew Morton
2020-06-08 4:40 ` Andrew Morton [this message]
2020-06-08 4:40 ` [patch 10/54] tools/testing/selftests/sysctl/sysctl.sh: support CONFIG_TEST_SYSCTL=y Andrew Morton
2020-06-08 4:40 ` [patch 11/54] lib/test_sysctl: support testing of sysctl. boot parameter Andrew Morton
2020-06-08 4:40 ` [patch 12/54] kernel/watchdog.c: convert {soft/hard}lockup boot parameters to sysctl aliases Andrew Morton
2020-06-08 4:40 ` [patch 13/54] kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected Andrew Morton
2020-06-08 4:40 ` [patch 14/54] panic: add sysctl to dump all CPUs backtraces on oops event Andrew Morton
2020-06-08 4:40 ` [patch 15/54] kernel/sysctl.c: ignore out-of-range taint bits introduced via kernel.tainted Andrew Morton
2020-06-08 4:40 ` [patch 16/54] mm/gup.c: convert to use get_user_{page|pages}_fast_only() Andrew Morton
2020-06-08 4:40 ` [patch 17/54] mm/gup: update pin_user_pages.rst for "case 3" (mmu notifiers) Andrew Morton
2020-06-08 4:41 ` [patch 18/54] mm/gup: introduce pin_user_pages_locked() Andrew Morton
2020-06-08 4:41 ` [patch 19/54] mm/gup: frame_vector: convert get_user_pages() --> pin_user_pages() Andrew Morton
2020-06-08 4:41 ` [patch 20/54] mm/gup: documentation fix for pin_user_pages*() APIs Andrew Morton
2020-06-08 4:41 ` [patch 21/54] docs: mm/gup: pin_user_pages.rst: add a "case 5" Andrew Morton
2020-06-08 4:41 ` [patch 22/54] vhost: convert get_user_pages() --> pin_user_pages() Andrew Morton
2020-06-08 4:41 ` [patch 23/54] mm/mmap.c: add more sanity checks to get_unmapped_area() Andrew Morton
2020-06-08 4:41 ` [patch 24/54] mm/mmap.c: do not allow mappings outside of allowed limits Andrew Morton
2020-06-08 17:50 ` Linus Torvalds
2020-06-08 17:55 ` Linus Torvalds
2020-06-08 4:41 ` [patch 25/54] arm: fix the flush_icache_range arguments in set_fiq_handler Andrew Morton
2020-06-08 4:41 ` [patch 26/54] nds32: unexport flush_icache_page Andrew Morton
2020-06-08 4:41 ` [patch 27/54] powerpc: unexport flush_icache_user_range Andrew Morton
2020-06-08 4:41 ` [patch 28/54] unicore32: remove flush_cache_user_range Andrew Morton
2020-06-08 4:41 ` [patch 29/54] asm-generic: fix the inclusion guards for cacheflush.h Andrew Morton
2020-06-08 4:41 ` [patch 30/54] asm-generic: don't include <linux/mm.h> in cacheflush.h Andrew Morton
2020-06-08 4:41 ` [patch 31/54] asm-generic: improve the flush_dcache_page stub Andrew Morton
2020-06-08 4:41 ` [patch 32/54] alpha: use asm-generic/cacheflush.h Andrew Morton
2020-06-08 4:41 ` [patch 33/54] arm64: " Andrew Morton
2020-06-08 4:41 ` [patch 34/54] c6x: " Andrew Morton
2020-06-08 4:41 ` [patch 35/54] hexagon: " Andrew Morton
2020-06-08 4:42 ` [patch 36/54] ia64: " Andrew Morton
2020-06-08 4:42 ` [patch 37/54] microblaze: " Andrew Morton
2020-06-08 4:42 ` [patch 38/54] m68knommu: " Andrew Morton
2020-06-08 4:42 ` [patch 39/54] openrisc: " Andrew Morton
2020-06-08 4:42 ` [patch 40/54] powerpc: " Andrew Morton
2020-06-08 4:42 ` [patch 41/54] riscv: " Andrew Morton
2020-06-08 4:42 ` [patch 42/54] arm,sparc,unicore32: remove flush_icache_user_range Andrew Morton
2020-06-08 4:42 ` [patch 43/54] mm: rename flush_icache_user_range to flush_icache_user_page Andrew Morton
2020-06-08 4:42 ` [patch 44/54] asm-generic: add a flush_icache_user_range stub Andrew Morton
2020-06-08 4:42 ` [patch 45/54] sh: implement flush_icache_user_range Andrew Morton
2020-06-08 4:42 ` [patch 46/54] xtensa: " Andrew Morton
2020-06-08 4:42 ` [patch 47/54] arm: rename flush_cache_user_range to flush_icache_user_range Andrew Morton
2020-06-08 4:42 ` [patch 48/54] m68k: implement flush_icache_user_range Andrew Morton
2020-06-08 4:42 ` [patch 49/54] exec: only build read_code when needed Andrew Morton
2020-06-08 4:42 ` [patch 50/54] exec: use flush_icache_user_range in read_code Andrew Morton
2020-06-08 4:42 ` [patch 51/54] binfmt_flat: use flush_icache_user_range Andrew Morton
2020-06-08 4:42 ` [patch 52/54] nommu: use flush_icache_user_range in brk and mmap Andrew Morton
2020-06-08 4:42 ` [patch 53/54] module: move the set_fs hack for flush_icache_range to m68k Andrew Morton
2020-06-08 4:42 ` [patch 54/54] doc: cgroup: update note about conditions when oom killer is invoked Andrew Morton
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