I really appreciate it! I really needed to know when exactly page tables get freed. As I looked at your functions, I ended up figuring out that my kernel (v5.3) defines HAVE_RCU_TABLE_FREE (I assume this is the default option) and uses __tlb_remove_table(), which frees pages. Finally, my functions work on these functions. Thanks again. 2021년 4월 6일 (화) 오전 11:42, Rik van Riel <riel@xxxxxxxxxxx>님이 작성: > > On Tue, 2021-04-06 at 00:39 +0900, Wonkyo Choe wrote: > > > 1. In x86, are all page-table pages released at the end of > > termination > > by using free_pgtables()? > > 2. In x86, a page-table page can be freed when there is no entry? In > > other words, does the Linux kernel > > release a page-table page on runtime? If so, what function would do > > this kind of task? > > At munmap time, as well as exit and execve time, page > tables can get freed. Look at the code between sys_munmap() > and zap_page_range(). > > -- > All Rights Reversed. -- ======================= 최원교 / Wonkyo Choe Phone. +82 10-5755-4519 ======================= _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
