On 14/11/2014 14:35, Radim Krčmář wrote:
> We are replacing in a sorted array, so the the direction of our
> traversal doesn't change, (and we could lose one tab level here,)
>
> if (new->npages < mslots[i].npages) {
> while (i < (KVM_MEM_SLOTS_NUM - 1) &&
> new->npages < mslots[i + 1].npages) {
> mslots[i] = mslots[i + 1];
> slots->id_to_index[mslots[i].id] = i;
> i++;
> }
> else if (new->npages > mslots[i].npages)
> while (i > 0 &&
> new->npages > mslots[i - 1].npages) {
> mslots[i] = mslots[i - 1];
> slots->id_to_index[mslots[i].id] = i;
> i--;
> }
>
> (I guess you don't want me to abstract these two loops further :)
Right. You do not need the "else if" as long as you keep the outer "if
(new->npages != mslots[i].npages)".
> (We'll have to change it into an interval tree, or something, if the
> number of slots rises anyway.)
I don't think that's needed, actually. gfn_to_page and gfn_to_memslot
are very rarely in the profiles with EPT.
Paolo
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