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x86: reducing debuginfo size by removing unneeded includes
I found it strange that the struct sk_buff definition was found inside the DWARF debugging sections in the generated object, so I verified and found that there is no need for the files that bring struct sk_buff definition into this file and verified also that sk_buff is not brought in indirectly too, thru other headers. I went on and removed many other unneeded includes and the end result is: [acme@doppio net-2.6]$ l /tmp/sys_ia32.o.before /tmp/sys_ia32.o.after -rw-rw-r-- 1 acme acme 185240 2008-02-06 19:19 /tmp/sys_ia32.o.after -rw-rw-r-- 1 acme acme 248328 2008-02-06 19:00 /tmp/sys_ia32.o.before Almost 64KB only on this object file! There were no other side effects from this change: [acme@doppio net-2.6]$ objcopy -j "text" /tmp/sys_ia32.o.before /tmp/text.before [acme@doppio net-2.6]$ objcopy -j "text" /tmp/sys_ia32.o.after /tmp/text.after [acme@doppio net-2.6]$ md5sum /tmp/text.before /tmp/text.after b7ac9b17942add68494e698e4f965d36 /tmp/text.before b7ac9b17942add68494e698e4f965d36 /tmp/text.after One of the complaints about using tools such as systemtap is that one has to install the huge kernel-debuginfo package: [acme@doppio net-2.6]$ rpm -q --qf "%{size}\n" kernel-rt-debuginfo 471737710 543867594 [acme@doppio net-2.6]$ Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@ -26,51 +26,27 @@
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#include <linux/file.h>
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#include <linux/signal.h>
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#include <linux/syscalls.h>
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#include <linux/resource.h>
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#include <linux/times.h>
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#include <linux/utsname.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/mm.h>
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#include <linux/shm.h>
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#include <linux/slab.h>
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#include <linux/uio.h>
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#include <linux/nfs_fs.h>
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#include <linux/quota.h>
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#include <linux/module.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/nfsd/nfsd.h>
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#include <linux/nfsd/cache.h>
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#include <linux/nfsd/xdr.h>
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#include <linux/nfsd/syscall.h>
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#include <linux/poll.h>
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#include <linux/personality.h>
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#include <linux/stat.h>
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#include <linux/ipc.h>
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#include <linux/rwsem.h>
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#include <linux/binfmts.h>
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#include <linux/init.h>
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#include <linux/aio_abi.h>
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#include <linux/aio.h>
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#include <linux/compat.h>
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#include <linux/vfs.h>
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#include <linux/ptrace.h>
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#include <linux/highuid.h>
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#include <linux/vmalloc.h>
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#include <linux/fsnotify.h>
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#include <linux/sysctl.h>
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#include <asm/mman.h>
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#include <asm/types.h>
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#include <asm/uaccess.h>
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#include <asm/semaphore.h>
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#include <asm/atomic.h>
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#include <asm/ldt.h>
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#include <net/scm.h>
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#include <net/sock.h>
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#include <asm/ia32.h>
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#include <asm/vgtod.h>
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#define AA(__x) ((unsigned long)(__x))
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