• A
    x86: reducing debuginfo size by removing unneeded includes · 28d23128
    Arnaldo Carvalho de Melo 提交于
    	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: NArnaldo Carvalho de Melo <acme@redhat.com>
    Signed-off-by: NIngo Molnar <mingo@elte.hu>
    Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
    28d23128
sys_ia32.c 22.5 KB