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

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