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SubjectRE: [PATCH] thp: Fix deadlock situation in vma_adjust with huge page in page cache
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Ning Qu wrote:
> In vma_adjust, the current code grabs i_mmap_mutex before calling
> vma_adjust_trans_huge. This used to be fine until huge page in page
> cache comes in. The problem is the underlying function
> split_file_huge_page will also grab the i_mmap_mutex before splitting
> the huge page in page cache. Obviously this is causing deadlock
> situation.
>
> This fix is to move the vma_adjust_trans_huge before grab the lock for
> file, the same as what the function is currently doing for anonymous
> memory.
>
> Tested, everything works fine so far.
>
> Signed-off-by: Ning Qu <quning@google.com>

Thanks, applied.

--
Kirill A. Shutemov


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