Date: Fri, 17 Feb 2017 11:49:24 -0800 From: John Baldwin <jhb@freebsd.org> To: Sean Bruno <sbruno@freebsd.org> Cc: freebsd-arch@freebsd.org, Warner Losh <imp@bsdimp.com> Subject: Re: Thinning out GENERIC Message-ID: <1907688.dXvDEfTesD@ralph.baldwin.cx> In-Reply-To: <bf4931ec-2c05-2b90-8bc6-affac684bd23@freebsd.org> References: <34e4e9bd-c7a8-e3e2-4cef-98a691ea7944@freebsd.org> <2553875.ilSvFZYQZ6@ralph.baldwin.cx> <bf4931ec-2c05-2b90-8bc6-affac684bd23@freebsd.org>
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On Friday, February 17, 2017 11:43:45 AM Sean Bruno wrote: > > On 02/13/17 11:33, John Baldwin wrote: > > On Monday, February 13, 2017 10:51:36 AM Warner Losh wrote: > >> [[ It isn't just GENERIC, it's in every single kernel ]] > >> > >> On Sun, Feb 12, 2017 at 7:59 AM, Sean Bruno <sbruno@freebsd.org> wrote: > >>> Index: sys/conf/files > >>> =================================================================== > >>> --- sys/conf/files (revision 313683) > >>> +++ sys/conf/files (working copy) > >>> @@ -2419,7 +2419,7 @@ > >>> dev/pci/pci_user.c optional pci > >>> dev/pci/pcib_if.m standard > >>> dev/pci/pcib_support.c standard > >>> -dev/pci/vga_pci.c optional pci > >>> +#dev/pci/vga_pci.c optional pci > >>> dev/pcn/if_pcn.c optional pcn pci > >>> dev/pdq/if_fea.c optional fea eisa > >>> dev/pdq/if_fpa.c optional fpa pci > >>> > >>> I'm playing around with small x86 builds and wanted to come up with a > >>> knob that disables the vga_pci driver. Obviously I still want pci(4) to > >>> be enabled, but I definitely do not need the vga interfaces for > >>> anything. Any suggestions? > >> > >> You could make it dependent on vt or sc as well as pci, no? > > > > This is a fairly small driver: > > > > 6139 340 8 6487 0x1957 /usr/obj/usr/src/sys/GENERIC > > /vga_pci.o > > > > (From an 11.0-stable build) > > > > device ppc and friends is a lot more for example: > > > > text data bss dec hex filename > > 6238 0 0 6238 0x185e /usr/obj/usr/src/sys/GENERIC/ppb_1284.o > > 1675 28 0 1703 0x6a7 /usr/obj/usr/src/sys/GENERIC/ppb_base.o > > 2042 0 0 2042 0x7fa /usr/obj/usr/src/sys/GENERIC/ppb_msq.o > > 6025 296 8 6329 0x18b9 /usr/obj/usr/src/sys/GENERIC/ppbconf.o > > 0 168 0 168 0xa8 /usr/obj/usr/src/sys/GENERIC/ppbus_if.o > > 9099 36 0 9135 0x23af /usr/obj/usr/src/sys/GENERIC/ppc.o > > 495 256 0 751 0x2ef /usr/obj/usr/src/sys/GENERIC/ppc_acpi.o > > 1671 256 0 1927 0x787 /usr/obj/usr/src/sys/GENERIC/ppc_isa.o > > 1124 208 0 1332 0x534 /usr/obj/usr/src/sys/GENERIC/ppc_pci.o > > 451 208 0 659 0x293 /usr/obj/usr/src/sys/GENERIC/ppc_puc.o > > 2751 428 8 3187 0xc73 /usr/obj/usr/src/sys/GENERIC/ppi.o > > > > It is needed for drm. > > > > Ok, so ... make it dependant on drm, vt, sc and pci? You can kldload drm at runtime, so a static dependency isn't sufficient. It's not clear why removing this from GENERIC is that important. ppc is on far fewer machines than vga_pci and takes up 10x more space. -- John Baldwin
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