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    SubjectRe: [RFC][2/3] Account and control virtual address space allocations
    Date
    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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