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SubjectRe: [RFC][2/3] Account and control virtual address space allocations
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From
> diff -puN mm/swapfile.c~memory-controller-virtual-address-space-accounting-and-control mm/swapfile.c
> diff -puN mm/memory.c~memory-controller-virtual-address-space-accounting-and-control mm/memory.c
> --- linux-2.6.25-rc5/mm/memory.c~memory-controller-virtual-address-space-accounting-and-control 2008-03-16 22:57:40.000000000 +0530
> +++ linux-2.6.25-rc5-balbir/mm/memory.c 2008-03-16 22:57:40.000000000 +0530
> @@ -838,6 +838,11 @@ unsigned long unmap_vmas(struct mmu_gath
>
> if (vma->vm_flags & VM_ACCOUNT)
> *nr_accounted += (end - start) >> PAGE_SHIFT;
> + /*
> + * Unaccount used virtual memory for cgroups
> + */
> + mem_cgroup_update_as(vma->vm_mm,
> + ((long)(start - end)) >> PAGE_SHIFT);
>
> while (start != end) {
> if (!tlb_start_valid) {

i think you can sum and uncharge it with a single call.

YAMAMOTO Takashi


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