Re: [PATCHv2 19/28] thp: run vma_adjust_trans_huge() outside i_mmap_rwsem

[Dave Hansen]

On 02/11/2016 06:21 AM, Kirill A. Shutemov wrote:
> vma_addjust_trans_huge() splits pmd if it's crossing VMA boundary.
> During split we munlock the huge page which requires rmap walk.
> rmap wants to take the lock on its own.

Ahhh, ... so we $SUBJECT in order to fix it.

Now it all makes sense.  Maybe I'm old fashioned, but I tend to have
forgotten $SUBJECT by the time I start to read the patch body text.
It's really handy for me when the body text stands on its own.