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kernel/sysctl.c: threads-max observe limits

Browse source 
Users can change the maximum number of threads by writing to
/proc/sys/kernel/threads-max.

With the patch the value entered is checked against the same limits that
apply when fork_init is called.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Heinrich Schuchardt 2015-04-16 12:47:50 -07:00 • committed by Linus Torvalds
parent ac1b398de1
commit 16db3d3f11
3 changed files with 34 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

6
kernel/sysctl.c
View file

@ -93,11 +93,9 @@
#include <linux/nmi.h>
#endif
#if defined(CONFIG_SYSCTL)
/* External variables not in a header file. */
extern int max_threads;
extern int suid_dumpable;
#ifdef CONFIG_COREDUMP
extern int core_uses_pid;
@ -710,10 +708,10 @@ static struct ctl_table kern_table[] = {
#endif
{
.procname = "threads-max",
.data = &max_threads,
.data = NULL,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
.proc_handler = sysctl_max_threads,
},
{
.procname = "random",