On munmap() zap_pte_range() is called which dirties the PTE dirty pages as Toshiyuki pointed out. zap_pte_range() mapping->a_ops->set_page_dirty (= ext4_journalled_set_page_dirty) So, I think that it is here that we should do the checking for a ext4 F.S frozen state and also prevent a parallel ext4 F.S freeze from happening. Attaching a patch for initial review. Please do let me know your thoughts! Thanks a lot! Warm Regards, Surbhi. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
