Matt Mackall <[EMAIL PROTECTED]> wrote:
>
> This set of patches introduces a new config option CONFIG_CORE_SMALL
> from the -tiny tree for small systems. This series should apply
> cleanly against 2.6.11-rc1-mm2.
>
> When selected, it enables various tweaks to miscellaneous core data
> structures to shrink their size on small systems. While each tweak is
> fairly small, in aggregate they can save a substantial amount of
> memory.
You know what I'm going to ask ;) How much memory?
I wish it didn't have "core" in the name. A little misleading.
Did you think of making CONFIG_CORE_SMALL an integer which has values zero
or one?
Then you can lose all those ifdefs:
#define MAX_PROBE_HASH (255 - CONFIG_CORE_SMALL * 254) /* dorky */
#define PID_MAX_DEFAULT (CONFIG_CORE_SMALL ? 0x1000 : 0x8000)
#define UIDHASH_BITS (CONFIG_CORE_SMALL ? 3 : 8)
#define FUTEX_HASHBITS (CONFIG_CORE_SMALL ? 4 : 8)
etc.
I think the ?: thing will work everywhere:
#define XX 1
char xx[XX ? 10 : 20];
even this works...
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