lkml.org 
[lkml]   [2008]   [Aug]   [26]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateTue, 26 Aug 2008 11:47:01 -0700 (PDT)
FromLinus Torvalds <>
SubjectRe: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c - bisected

On Tue, 26 Aug 2008, Adrian Bunk wrote:
> 
> I added "-fno-inline-functions-called-once -fno-early-inlining" to 
> KBUILD_CFLAGS, and (with gcc 4.3) that increased the size of my kernel 
> image by 2%.

Btw, did you check with just "-fno-inline-functions-called-once"?

The -fearly-inlining decisions _should_ be mostly right. If gcc sees early 
that a function is so small (even without any constant propagation etc) 
that it can be inlined, it's probably right. 

The inline-functions-called-once thing is what causes even big functions 
to be inlined, and that's where you find the big downsides too (eg the 
stack usage).

			Linus


\
 
 \ /
  Last update: 2008-08-26 20:51    [from the cache]
©2003-2008