linux-master/mm/memory.c

3504 	 * We could currently only reuse a subpage of a large folio if no
4590 	 * Just backoff if any subpage of a THP is corrupted otherwise
4593 	 * the corrupted subpage should trigger SIGBUS as expected.
6229  * operation.  The target subpage will be processed last to keep its
6241 	/* Process target subpage last to keep its cache lines hot */
6245 		/* If target subpage in first half of huge page */
6256 		/* If target subpage in second half of huge page */
6269 	 * towards the target subpage
6393 	struct page *subpage;
6396 		subpage = folio_page(dst_folio, i);
6397 		kaddr = kmap_local_page(subpage);
6409 		flush_dcache_page(subpage);