Messages in this thread | | | Date | Thu, 30 Apr 2015 00:37:44 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: Regression: Requiring CAP_SYS_ADMIN for /proc/<pid>/pagemap causes application-level breakage |
| |
On Wed, Apr 29, 2015 at 02:18:49PM -0700, Linus Torvalds wrote: > On Wed, Apr 29, 2015 at 2:05 PM, Kirill A. Shutemov > <kirill@shutemov.name> wrote: > > > > This sounds too ugly to be exposed it as ABI. > > Oh, pretty it ain't. However, regressions in many ways are worse. If > it makes it possible to not regress...
One idea is to extend kcmp(2) with KCMP_PAGE. idx1 and idx2 are virtual addresses in two processes. It returns 0 if addresses points to the same page and 3 otherwise.
Would it be enough for the use case?
I guess it could be too slow to check one page a time...
Invent new kcmpv(2)? ;)
-- Kirill A. Shutemov
| |