diff options
| author | Konstantin Khlebnikov <koct9i@gmail.com> | 2014-07-17 10:57:58 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2014-07-17 10:57:58 +1000 |
| commit | 658f6f6e71be87cf1d27c225b85fef4801795a0b (patch) | |
| tree | 0b8bbc413c4e857f7141c9a009791defd1d18b14 /mm | |
| parent | 20fd32305a4fc939415da8723af42c40750275eb (diff) | |
mm: catch memory commitment underflow
Print a warning (if CONFIG_DEBUG_VM=y) when memory commitment becomes too
negative.
This shouldn't happen any more - the previous two patches fixed the
committed_as underflow issues.
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/mmap.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 129b847d30cc..d3decd9cec8c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -134,6 +134,12 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin) { unsigned long free, allowed, reserve; +#ifdef CONFIG_DEBUG_VM + WARN_ONCE(percpu_counter_read(&vm_committed_as) < + -(s64)vm_committed_as_batch * num_online_cpus(), + "memory commitment underflow"); +#endif + vm_acct_memory(pages); /* |