Re: [PATCH -mm v2 01/11] mm: track free size between VMAs in VMArbtree

From: Rik van Riel
Date: Fri Jun 22 2012 - 10:12:30 EST


On 06/22/2012 05:58 AM, Peter Zijlstra wrote:
On Thu, 2012-06-21 at 17:57 -0400, Rik van Riel wrote:
@@ -1941,6 +2017,8 @@ detach_vmas_to_be_unmapped(struct mm_struct *mm, struct vm_area_struct *vma,
*insertion_point = vma;
if (vma)
vma->vm_prev = prev;
+ if (vma)
+ rb_augment_erase_end(&vma->vm_rb, vma_rb_augment_cb, NULL);

Shouldn't that be adjust_free_gap()? There is after all no actual erase
happening.

You are right. I will fix this and also adjust the comment
above adjust_free_gap().

I am still trying to wrap my brain around your alternative
search algorithm, not sure if/how it can be combined with
arbitrary address limits and alignment...

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