Date: Thu, 10 Dec 2015 22:18:19 +0100 From: Oliver Pinter <oliver.pinter@hardenedbsd.org> To: Konstantin Belousov <kib@freebsd.org> Cc: "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org> Subject: Re: svn commit: r291171 - in head/sys: amd64/amd64 compat/ia32 i386/i386 kern sys Message-ID: <CAPQ4fftPdFuShhVY=OyNAUoh670fUOGcyqB2vAg_n9uLmAyw5Q@mail.gmail.com> In-Reply-To: <201511230709.tAN79Z4L062228@repo.freebsd.org> References: <201511230709.tAN79Z4L062228@repo.freebsd.org>
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On Mon, Nov 23, 2015 at 8:09 AM, Konstantin Belousov <kib@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 >
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