pr_set_thp_disable(2const)

set the state of the "THP disable" flag for the calling thread

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Synopsis

#include <linux/prctl.h>
  /* Definition of 
PR_*
 constants */
#include <sys/prctl.h>
int prctl(PR_SET_THP_DISABLE, long 
flag
, 0L, 0L, 0L);

—

NAME

PR_SET_THP_DISABLE - set the state of the "THP disable" flag for the calling thread

SYNOPSIS

bash

#include <linux/prctl.h>\n  /* Definition of \nPR_*\n constants */
\n#include <sys/prctl.h>

bash

int prctl(PR_SET_THP_DISABLE, long \nflag\n, 0L, 0L, 0L);

DESCRIPTION

Set the state of the "THP disable" flag for the calling thread. If flag has a nonzero value, the flag is set, otherwise it is cleared.

Setting this flag provides a method for disabling transparent huge pages for jobs where the code cannot be modified, and using a malloc hook with madvise(2) is not an option (i.e., statically allocated data). The setting of the "THP disable" flag is inherited by a child created via fork(2) and is preserved across execve(2).

RETURN VALUE

On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.

STANDARDS

Linux.

HISTORY

Linux 3.15.