Commit 8ac773b4 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Linus Torvalds
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[PATCH] OOM killer meets userspace headers



Despite mm.h is not being exported header, it does contain one thing
which is part of userspace ABI -- value disabling OOM killer for given
process. So,
a) create and export include/linux/oom.h
b) move OOM_DISABLE define there.
c) turn bounding values of /proc/$PID/oom_adj into defines and export
   them too.

Note: mass __KERNEL__ removal will be done later.
Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 887b9593
......@@ -72,6 +72,7 @@
#include <linux/audit.h>
#include <linux/poll.h>
#include <linux/nsproxy.h>
#include <linux/oom.h>
#include "internal.h"
/* NOTE:
......@@ -689,7 +690,8 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
if (copy_from_user(buffer, buf, count))
return -EFAULT;
oom_adjust = simple_strtol(buffer, &end, 0);
if ((oom_adjust < -16 || oom_adjust > 15) && oom_adjust != OOM_DISABLE)
if ((oom_adjust < OOM_ADJUST_MIN || oom_adjust > OOM_ADJUST_MAX) &&
oom_adjust != OOM_DISABLE)
return -EINVAL;
if (*end == '\n')
end++;
......
......@@ -120,6 +120,7 @@ header-y += netrom.h
header-y += nfs2.h
header-y += nfs4_mount.h
header-y += nfs_mount.h
header-y += oom.h
header-y += param.h
header-y += pci_ids.h
header-y += pci_regs.h
......
......@@ -1115,9 +1115,6 @@ int in_gate_area_no_task(unsigned long addr);
#define in_gate_area(task, addr) ({(void)task; in_gate_area_no_task(addr);})
#endif /* __HAVE_ARCH_GATE_AREA */
/* /proc/<pid>/oom_adj set to -17 protects from the oom-killer */
#define OOM_DISABLE -17
int drop_caches_sysctl_handler(struct ctl_table *, int, struct file *,
void __user *, size_t *, loff_t *);
unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask,
......
#ifndef __INCLUDE_LINUX_OOM_H
#define __INCLUDE_LINUX_OOM_H
/* /proc/<pid>/oom_adj set to -17 protects from the oom-killer */
#define OOM_DISABLE (-17)
/* inclusive */
#define OOM_ADJUST_MIN (-16)
#define OOM_ADJUST_MAX 15
#endif
......@@ -15,6 +15,7 @@
* kernel subsystems and hints as to where to find out what things do.
*/
#include <linux/oom.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/swap.h>
......
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