[PATCH 0/2] Account PMD page tables to the process
From: Kirill A. Shutemov
Date: Tue Jan 13 2015 - 14:14:36 EST
Currently we don't account PMD page tables to the process. It can lead to
local DoS: unprivileged user can allocate >500 MiB on x86_64 per process
without being noticed by oom-killer or memory cgroup.
Proposed fix adds accounting for PMD table the same way we account for PTE
tables.
There're few corner case in the accounting (see patch 2/2) which have not
well tested yet. If anybody know any other cases we should handle, please
let me know.
Kirill A. Shutemov (2):
mm: rename mm->nr_ptes to mm->nr_pgtables
mm: account pmd page tables to the process
Documentation/sysctl/vm.txt | 2 +-
arch/x86/mm/pgtable.c | 13 ++++++++-----
fs/proc/task_mmu.c | 2 +-
include/linux/mm_types.h | 2 +-
kernel/fork.c | 2 +-
mm/debug.c | 4 ++--
mm/huge_memory.c | 10 +++++-----
mm/hugetlb.c | 8 ++++++--
mm/memory.c | 6 ++++--
mm/mmap.c | 9 +++++++--
mm/oom_kill.c | 8 ++++----
11 files changed, 40 insertions(+), 26 deletions(-)
--
2.1.4
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