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

[Lorenzo Stoakes]

On Mon, Nov 10, 2025 at 01:47:10PM +0000, Matthew Wilcox wrote:
> 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?

Because they just compiled it and it's not been written back to disk yet :)