ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 20:51:03 +02:00
Code Issues Packages Projects Releases Wiki Activity

kernel/hung_task convert hung_task_panic boot parameter to sysctl

Browse Source 
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.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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>
Link: http://lkml.kernel.org/r/20200427180433.7029-4-vbabka@suse.cz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vlastimil Babka
2020-06-07 21:40:31 -07:00
committed by Linus Torvalds
parent 0a477e1ae2
commit b467f3ef3c
3 changed files with 2 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/admin-guide/kernel-parameters.txt
View File

@@ -1515,7 +1515,7 @@
[KNL] Should the hung task detector generate panics. [KNL] Should the hung task detector generate panics.
Format: <integer> 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 hung task is detected. The default value is controlled
by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time
option. The value selected by this boot parameter can option. The value selected by this boot parameter can

1
fs/proc/proc_sysctl.c
View File

@@ -1721,6 +1721,7 @@ struct sysctl_alias {
*/ */
static const struct sysctl_alias sysctl_aliases[] = { static const struct sysctl_alias sysctl_aliases[] = {
{"numa_zonelist_order", "vm.numa_zonelist_order" }, {"numa_zonelist_order", "vm.numa_zonelist_order" },
{"hung_task_panic", "kernel.hung_task_panic" },
{ } { }
}; };

10
kernel/hung_task.c
View File

@@ -63,16 +63,6 @@ static struct task_struct *watchdog_task;
unsigned int __read_mostly sysctl_hung_task_panic = unsigned int __read_mostly sysctl_hung_task_panic =
CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE; 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 static int
hung_task_panic(struct notifier_block *this, unsigned long event, void *ptr) hung_task_panic(struct notifier_block *this, unsigned long event, void *ptr)
{ {