Re: [PATCH 1/2] mm/khugepaged: do synchronous writeback for MADV_COLLAPSE

[Matthew Wilcox]

On Mon, Nov 10, 2025 at 11:32:53AM +0000, Shivank Garg wrote:
> When MADV_COLLAPSE is called on file-backed mappings (e.g., executable
> text sections), the pages may still be dirty from recent writes. The

That explanation derails my brain entirely.  Text isn't writable!  How
can the pages be dirty and file-backed text?