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-rw-r--r--include/linux/sched.h2
-rw-r--r--mm/ksm.c2
-rw-r--r--mm/oom_kill.c2
-rw-r--r--mm/swapfile.c4
4 files changed, 6 insertions, 4 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8f3e63c..899d730 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1720,7 +1720,7 @@ extern cputime_t task_gtime(struct task_struct *p);
#define PF_FROZEN 0x00010000 /* frozen for system suspend */
#define PF_FSTRANS 0x00020000 /* inside a filesystem transaction */
#define PF_KSWAPD 0x00040000 /* I am kswapd */
-#define PF_SWAPOFF 0x00080000 /* I am in swapoff */
+#define PF_OOM_ORIGIN 0x00080000 /* Allocating much memory to others */
#define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
#define PF_KTHREAD 0x00200000 /* I am a kernel thread */
#define PF_RANDOMIZE 0x00400000 /* randomize virtual address space */
diff --git a/mm/ksm.c b/mm/ksm.c
index e11e7a5..37cc373 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1557,7 +1557,9 @@ static ssize_t run_store(struct kobject *kobj, struct kobj_attribute *attr,
if (ksm_run != flags) {
ksm_run = flags;
if (flags & KSM_RUN_UNMERGE) {
+ current->flags |= PF_OOM_ORIGIN;
err = unmerge_and_remove_all_rmap_items();
+ current->flags &= ~PF_OOM_ORIGIN;
if (err) {
ksm_run = KSM_RUN_STOP;
count = err;
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index a7b2460..da4c342 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -79,7 +79,7 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
/*
* swapoff can easily use up all memory, so kill those first.
*/
- if (p->flags & PF_SWAPOFF)
+ if (p->flags & PF_OOM_ORIGIN)
return ULONG_MAX;
/*
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 74f1102..f1bf19d 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1575,9 +1575,9 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
p->flags &= ~SWP_WRITEOK;
spin_unlock(&swap_lock);
- current->flags |= PF_SWAPOFF;
+ current->flags |= PF_OOM_ORIGIN;
err = try_to_unuse(type);
- current->flags &= ~PF_SWAPOFF;
+ current->flags &= ~PF_OOM_ORIGIN;
if (err) {
/* re-insert swap space back into swap_list */
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