Messages in this thread | | | Subject | Re: [RFC 1/3] x86/vdso: create vdso file, use it for mapping | From | Dmitry Safonov <> | Date | Mon, 29 Aug 2016 12:50:42 +0300 |
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On 08/29/2016 12:28 PM, Andy Lutomirski wrote: > On Thu, Aug 25, 2016 at 8:21 AM, Dmitry Safonov <dsafonov@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.
Hmm, yes, I guess. The only thing -- we'll still need per-arch changes to initialize those files on booting. But that looks like the proper generic place to move this code.
> Also, could this be simplified to use anon_inode? > > (I'm not a VFS expert at all, so I could be way off base.)
Well, I'll try to do the second version with anon_inode.
Thanks, Dmitry
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