Re: 2.6.15-rc5: latency regression vs 2.6.14 inexit_mmap->free_pgtables

[Lee Revell]

On Tue, 2005-12-27 at 18:31 -0500, Lee Revell wrote:
> The problem is that we now do a lot more work in free_pgtables under the
> mm->page_table_lock spinlock so preemption can be delayed for a long
> time.  Here is the change responsible:

Hugh,

I have found the commit that introduced the regression:

[PATCH 16/21] mm: unlink vma before pagetables

http://lkml.org/lkml/2005/10/12/227

Lee

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