Looking at the sizes :

tfoerste@n22 ~/tmp $ ls -l /usr/local/bin/*
-rwxr-xr-x 1 root root 19470883 Mar  1 20:44 /usr/local/bin/linux-v3.7.10
-rwxr-xr-x 1 root root 19904366 Mar  4 23:00 /usr/local/bin/linux-v3.8.2
-rwxr-xr-x 1 root root 15870361 Mar  9 17:45 
/usr/local/bin/linux-v3.9-rc1-277-g0aefda3
-rwxr-xr-x 1 root root 15870377 Mar 10 22:32 
/usr/local/bin/linux-v3.9-rc1-283-g7293261

I'm just curious why 3.9 has 20% less (or better why are the older so fat) ?

I used the same compiler (4.6.3) and nearly the same .config,
the diff stat between 3.8.2 and 3.9-rc1 is  :

$ diff 382 391 
3c3
< # User Mode Linux/i386 3.8.0-rc1 Kernel Configuration
---
> # User Mode Linux/x86 3.9.0-rc1 Kernel Configuration
71,72d70
< CONFIG_SELECT_MEMORY_MODEL=y
< CONFIG_FLATMEM_MANUAL=y
74a73
> # CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
81d79
< CONFIG_VIRT_TO_BUS=y
101a100
> CONFIG_IRQ_WORK=y
129a129
> # CONFIG_ALWAYS_USE_PERSISTENT_CLOCK is not set
151a152
> # CONFIG_RCU_STALL_COMMON is not set
171a173
> # CONFIG_USER_NS is not set
173a176,177
> CONFIG_UIDGID_CONVERTED=y
> # CONFIG_UIDGID_STRICT_TYPE_CHECKS is not set
209a214
> # CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
212d216
< CONFIG_GENERIC_SIGALTSTACK=y
213a218,219
> CONFIG_OLD_SIGSUSPEND3=y
> CONFIG_OLD_SIGACTION=y
285a292
> CONFIG_FW_LOADER_USER_HELPER=y
341a349
> # CONFIG_DM_CACHE is not set
390a399
> CONFIG_TTY=y
449a459
> # CONFIG_MAILBOX is not set
453c463
< # Remoteproc drivers (EXPERIMENTAL)
---
> # Remoteproc drivers
457c467
< # Rpmsg drivers (EXPERIMENTAL)
---
> # Rpmsg drivers
524d533
< # CONFIG_WAN_ROUTER is not set
531a541
> # CONFIG_VSOCKETS is not set
783a794
> # CONFIG_CRYPTO_CRC32 is not set
843d853
< CONFIG_PERCPU_RWSEM=y
900d909
< # CONFIG_SPARSE_RCU_POINTER is not set
917a927,931
>
> #
> # RCU Debugging
> #
> # CONFIG_SPARSE_RCU_POINTER is not set
t

-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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