On Tue, Sep 10, 2024 at 11:43:58PM +0000, Ackerley Tng wrote: > @@ -790,6 +791,9 @@ static long kvm_gmem_punch_hole(struct inode *inode, > loff_t offset, loff_t len) > */ > filemap_invalidate_lock(inode->i_mapping); > > + /* TODO: Check if even_cows should be 0 or 1 */ > + unmap_mapping_range(inode->i_mapping, start, len, 0);
Should be s/start/offset/ here, or should expect some filemap crash assert on non-zero mapcounts (when it starts to matter). Btw, it would be nice if the new version would allow kvm to be compiled as a module. Currently it uses a lot of mm functions that are not yet exported, so AFAIU it will only build if kvm is builtin. Thanks, -- Peter Xu
