Messages in this thread | | | Date | Fri, 15 Sep 2006 17:14:27 -0700 | From | "Randy.Dunlap" <> | Subject | Re: + allow-proc-configgz-to-be-built-as-a-module.patch added to -mm tree |
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On Fri, 15 Sep 2006 16:41:35 -0700 Andrew Morton wrote:
> On Fri, 15 Sep 2006 15:47:52 -0700 > "Randy.Dunlap" <rdunlap@xenotime.net> wrote: > > > On Fri, 15 Sep 2006 14:58:06 -0700 akpm@osdl.org wrote: > > > > > > > > The patch titled > > > > > > allow /proc/config.gz to be built as a module > > > > > > has been added to the -mm tree. Its filename is > > > > > > allow-proc-configgz-to-be-built-as-a-module.patch > > > > > > See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find > > > out what to do about this > > > > > > ------------------------------------------------------ > > > Subject: allow /proc/config.gz to be built as a module > > > From: Ross Biro <rossb@google.com> > > > > When/where was this patch submitted? I seem to have missed it > > (or it was so long ago that I forgot about it). > > Ross wrote it today and I stole it. > > > > The driver for /proc/config.gz consumes rather a lot of memory and it is in > > > fact possible to build it as a module. > > > > Can you try to quantify "rather a lot of memory"? > > I confused it with /proc/kallsyms. No, /proc/config.gz doesn't use much > memory. > > > > In some ways this is a bit risky, because the .config which is used for > > > compiling kernel/configs.c isn't necessarily the same as the .config which was > > > used to build vmlinux. > > > > and that's why a module wasn't allowed. > > It's not worth the risk IMO. > > I'd want to be hearing from distro people on that - I'd expect that the > .config which is used to build configs.ko would not differ from that which > is used to build vmlinux. > > Plus it's configurable. > > Am not particularly fussed either way, really. It would be better if > treading on /proc/config.gz were to cause a modprobe of the driver for it, > but procfs doesn't work that way.
I'm not terribly fussed either way either. We have just about hit my quota/limit for discussion of this patch. :)
If memory is an issue, one should just build the .config file into the kernel image and use scripts/extract-ikconfig to read it back (IMHO).
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