Messages in this thread | | | Date | Wed, 23 Jul 2003 14:47:19 -0700 | From | "Randy.Dunlap" <> | Subject | Re: Kernel 2.6 size increase |
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On Wed, 23 Jul 2003 13:07:12 -0700 "David S. Miller" <davem@redhat.com> wrote:
| On Wed, 23 Jul 2003 15:14:22 -0400 (EDT) | "Richard B. Johnson" <root@chaos.analogic.com> wrote: | | > On Wed, 23 Jul 2003, Bernardo Innocenti wrote: | > It looks like a lot of data may have been initialized in the | > newer kernel, i.e. int barf = 0; or struct vomit = {0,}. | > If they just declared the static data, it would end up in | > .bss which is allocated at run-time (and zeroed) and is | > not in the kernel image. | | GCC 3.3 and later do this automatically. | | It's weird, since we killed TONS of explicit zero initializers during | 2.5.x, you'd be pressed to find many examples like the one you | mention. | | Another thing is that the define_per_cpu() stuff eliminated many huge | [NR_CPUS] arrays. But this probably doesn't apply to his kernel | unless he built is with SMP enabled.
Yes, lots were already killed off, but there are also several kernel-janitor patches to remove many more static 0 inits. They can be found at http://developer.osdl.org/ogasawara/kj-patches/uninit_static/ and I'll be trying to have them merged, although I don't know how well they will be accepted.
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