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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-12 16:53:38 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-12 16:53:38 +1000 |
| commit | bc47ab0241c7c86da4f5e5f82fbca7d45387c18d (patch) | |
| tree | b9c33ae8b6de43e44cc5fcbaa3e4a15f18a5ed42 /mm/mmap.c | |
| parent | 37f9ef553bed630957e025504cdcbc76f5de49d5 (diff) | |
| parent | 8ebf975608aaebd7feb33d77f07ba21a6380e086 (diff) | |
Merge commit 'origin/master' into next
Manual merge of:
arch/powerpc/kernel/asm-offsets.c
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 6b7b1a95944..34579b23ebd 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -28,6 +28,7 @@ #include <linux/mempolicy.h> #include <linux/rmap.h> #include <linux/mmu_notifier.h> +#include <linux/perf_counter.h> #include <asm/uaccess.h> #include <asm/cacheflush.h> @@ -87,6 +88,9 @@ int sysctl_overcommit_ratio = 50; /* default is 50% */ int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT; struct percpu_counter vm_committed_as; +/* amount of vm to protect from userspace access */ +unsigned long mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR; + /* * Check that a process has enough memory to allocate a new virtual * mapping. 0 means there is enough memory for the allocation to @@ -1219,6 +1223,8 @@ munmap_back: if (correct_wcount) atomic_inc(&inode->i_writecount); out: + perf_counter_mmap(vma); + mm->total_vm += len >> PAGE_SHIFT; vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT); if (vm_flags & VM_LOCKED) { @@ -2305,6 +2311,8 @@ int install_special_mapping(struct mm_struct *mm, mm->total_vm += len >> PAGE_SHIFT; + perf_counter_mmap(vma); + return 0; } |