Date: Fri, 17 Feb 2017 13:23:01 -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: <6526794.FlmyzlfvMp@ralph.baldwin.cx> In-Reply-To: <ff6d9a9d-36f2-459f-78c5-a7269c2caae9@freebsd.org> References: <34e4e9bd-c7a8-e3e2-4cef-98a691ea7944@freebsd.org> <1907688.dXvDEfTesD@ralph.baldwin.cx> <ff6d9a9d-36f2-459f-78c5-a7269c2caae9@freebsd.org>
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On Friday, February 17, 2017 12:54:29 PM Sean Bruno wrote: > > On 02/17/17 12:49, John Baldwin wrote: > > 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. > > > > I don't want to remove it from GENERIC. I want to add the capability to > remove it. Sorry if that wasn't clear from my subject line, because it > doesn't look clear now that I re-read it. Why not make this conditional on 'vga'? GENERIC already contains 'device vga' that the VGA-specific bits of 'vt', etc. are dependent on. -- John Baldwin
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