On Mon, Nov 10, 2025 at 01:52:46PM +0000, Lorenzo Stoakes wrote: > 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 :)
So we can avoid these patches simply by changing userspace to call fsync()? Cool!
