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 <[email protected]> --- 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
