On Mon, Aug 29, 2016 at 02:28:08AM -0700, Andy Lutomirski wrote: > On Thu, Aug 25, 2016 at 8:21 AM, Dmitry Safonov <dsafo...@virtuozzo.com> > wrote: > > I added here a new in-kernel fs with ramfs-like options. > > Created vdso file in this fs (yet for testing, only 64-bit vdso). > > Mapped this file to process's mm on setup_additional_pages. > > Just for testing purpose it's done only for specific UID. > > I'm wondering whether all this code could be easily moved into the > core special mapping helpers so that all special mappings get the same > benefit. We could embed a struct file * (or struct inode or whatever) > in special_mapping if needed. > > Also, could this be simplified to use anon_inode?
Please, don't. anon_inode is for situations when you don't mind sharing the _same_ inode for different things. This one very clearly isn't that.
