This gives the OOM killer an additional hint which processes are
referencing shmem files with potentially no other accounting for them.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
mm/shmem.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/shmem.c b/mm/shmem.c
index 4b2fea33158e..a4ad92a16968 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2179,6 +2179,11 @@ unsigned long shmem_get_unmapped_area(struct file *file,
return inflated_addr;
}
+static long shmem_oom_badness(struct file *file)
+{
+ return i_size_read(file_inode(file)) >> PAGE_SHIFT;
+}
+
#ifdef CONFIG_NUMA
static int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *mpol)
{
@@ -3780,6 +3785,7 @@ EXPORT_SYMBOL(shmem_aops);
static const struct file_operations shmem_file_operations = {
.mmap = shmem_mmap,
.get_unmapped_area = shmem_get_unmapped_area,
+ .oom_badness = shmem_oom_badness,
#ifdef CONFIG_TMPFS
.llseek = shmem_file_llseek,
.read_iter = shmem_file_read_iter,
--
2.25.1
