Track maximum size of address space, presented in /proc/self/limits.
Signed-off-by: Topi Miettinen <toiwoton@xxxxxxxxx>
---
mm/mmap.c | 4 ++++
mm/mremap.c | 3 +++
2 files changed, 7 insertions(+)
diff --git a/mm/mmap.c b/mm/mmap.c
index 4e683dd..4876c21 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2706,6 +2706,9 @@ static int do_brk(unsigned long addr, unsigned long len)
out:
perf_event_mmap(vma);
mm->total_vm += len >> PAGE_SHIFT;
+
+ bump_rlimit(RLIMIT_AS, mm->total_vm << PAGE_SHIFT);
+
mm->data_vm += len >> PAGE_SHIFT;
if (flags & VM_LOCKED)
mm->locked_vm += (len >> PAGE_SHIFT);
@@ -2926,6 +2929,7 @@ bool may_expand_vm(struct mm_struct *mm, vm_flags_t flags, unsigned long npages)
void vm_stat_account(struct mm_struct *mm, vm_flags_t flags, long npages)
{
mm->total_vm += npages;
+ bump_rlimit(RLIMIT_AS, mm->total_vm << PAGE_SHIFT);
if (is_exec_mapping(flags))
mm->exec_vm += npages;
diff --git a/mm/mremap.c b/mm/mremap.c
index ade3e13..6be3c01 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -397,6 +397,9 @@ static struct vm_area_struct *vma_to_resize(unsigned long addr,
if (vma->vm_flags & VM_LOCKED)
bump_rlimit(RLIMIT_MEMLOCK, (mm->locked_vm << PAGE_SHIFT) +
new_len - old_len);
+ bump_rlimit(RLIMIT_AS, (mm->total_vm << PAGE_SHIFT) +
+ new_len - old_len);
+
return vma;
}
--
2.8.1
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