Re: [PATCH RFC] mm: Rework virtual memory accounting

[Cyrill Gorcunov]

On Mon, Dec 28, 2015 at 03:10:02PM -0800, Andrew Morton wrote:
> On Tue, 29 Dec 2015 00:10:15 +0300 Cyrill Gorcunov <gorcunov@xxxxxxxxx> wrote:
...
> 
> This clashes with
> mm-mmapc-remove-redundant-local-variables-for-may_expand_vm.patch,
> below.  I resolved it thusly:
> 
> bool may_expand_vm(struct mm_struct *mm, vm_flags_t flags, unsigned long npages)
> {
> 	if (mm->total_vm + npages > rlimit(RLIMIT_AS) >> PAGE_SHIFT)
> 		return false;
> 
> 	if ((flags & (VM_WRITE | VM_SHARED | (VM_STACK_FLAGS &
> 				(VM_GROWSUP | VM_GROWSDOWN)))) == VM_WRITE)
> 		return mm->data_vm + npages <= rlimit(RLIMIT_DATA);
> 
> 	return true;
> }

Thanks, Andrew!
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