Re: [PATCH] mm: hugepage: mark splitted page dirty when needed

[Kirill A. Shutemov]

On Tue, Sep 04, 2018 at 03:55:10PM +0800, Peter Xu wrote:
> When splitting a huge page, we should set all small pages as dirty if
> the original huge page has the dirty bit set before.  Otherwise we'll
> lose the original dirty bit.

We don't lose it. It got transfered to struct page flag:

        if (pmd_dirty(old_pmd))
                SetPageDirty(page);

-- 
 Kirill A. Shutemov