svn commit: r291171 - in head/sys: amd64/amd64 compat/ia32 i386/i386 kern sys

[Oliver Pinter]

On Mon, Nov 23, 2015 at 8:09 AM, Konstantin Belousov <kib at freebsd.org> wrote:
> Author: kib
> Date: Mon Nov 23 07:09:35 2015
> New Revision: 291171
> URL: https://svnweb.freebsd.org/changeset/base/291171
>
> Log:
>   Split kerne timekeep ABI structure vdso_sv_tk out of the struct
>   sysentvec.  This allows the timekeep data to be shared between similar
>   ABIs which cannot share sysentvec.
>
>   Make the timekeep_push_vdso() tick callback to the timekeep structures
>   instead of sysentvecs.  If several sysentvec share the vdso_sv_tk
>   structure, we would update the userspace data several times on each
>   tick, without the change.
>
>   Only allocate vdso_sv_tk in the exec_sysvec_init() sysinit when
>   sysentvec is marked with the new SV_TIMEKEEP flag.  This saves
>   allocation and update of unneeded vdso_sv_tk for ABIs which do not
>   provide userspace gettimeofday yet, which are PowerPCs arches right
>   now.
>
>   Make vdso_sv_tk allocator public, namely split out and export
>   alloc_sv_tk() and alloc_sv_tk_compat32().  ABIs which share timekeep
>   data now can allocate it manually and share as appropriate.
>
>   Requested by: nwhitehorn
>   Tested by:    nwhitehorn, pho
>   Sponsored by: The FreeBSD Foundation
>   MFC after:    2 weeks

Hello Konstantin!

Do you plan to MFC back this changes to 10-STABLE in these days?

>
> Modified:
>   head/sys/amd64/amd64/elf_machdep.c
>   head/sys/compat/ia32/ia32_sysvec.c
>   head/sys/i386/i386/elf_machdep.c
>   head/sys/kern/kern_sharedpage.c
>   head/sys/sys/sysent.h
>   head/sys/sys/vdso.h
>