On Tue, Mar 10, 2009 at 11:55:23AM +0200, Pierre Ossman wrote:
> On Tue, 10 Mar 2009 16:19:17 +0800
> Wu Fengguang <fengguang.wu@intel.com> wrote:
> 
> > 
> > Here is the initial patch and tool for finding the missing pages.
> > 
> > In the following example, the pages with no flags set is kind of too
> > many (1816MB), but hopefully your missing pages will have PG_reserved
> > or other flags set ;-)
> > 
> > # ./page-types
> > L:locked E:error R:referenced U:uptodate D:dirty L:lru A:active S:slab W:writeback x:reclaim B:buddy r:reserved c:swapcache b:swapbacked
> >  
> 
> Thanks. I'll have a look in a bit. Right now I'm very close to a
> complete bisect. It is just ftrace commits left though, so I'm somewhat
> sceptical that it is correct. ftrace isn't even turned on in the
> kernels I've been testing.
> 
> The remaining commits are ec1bb60bb..6712e299.

And here's my progress, some more page flags are introduced:

# ./page-types
  flags page-count       MB    symbolic-flags    long-symbolic-flags
0x00000       3978       15  __________________  
0x00004          1        0  __R_______________  referenced
0x00014          5        0  __R_D_____________  referenced,dirty
0x00020          2        0  _____l____________  lru
0x00028       8835       34  ___U_l____________  uptodate,lru
0x0002c       9588       37  __RU_l____________  referenced,uptodate,lru
0x00068       1031        4  ___U_lA___________  uptodate,lru,active
0x0006c       3032       11  __RU_lA___________  referenced,uptodate,lru,active
0x00080      11001       42  _______S__________  slab
0x00228        140        0  ___U_l___x________  uptodate,lru,reclaim
0x0022c         79        0  __RU_l___x________  referenced,uptodate,lru,reclaim
0x00268         43        0  ___U_lA__x________  uptodate,lru,active,reclaim
0x0026c        110        0  __RU_lA__x________  referenced,uptodate,lru,active,reclaim
0x00400       1102        4  __________B_______  buddy
0x00800      18735       73  ___________r______  reserved
0x02008         13        0  ___U_________b____  uptodate,swapbacked
0x02068       9371       36  ___U_lA______b____  uptodate,lru,active,swapbacked
0x0206c       1339        5  __RU_lA______b____  referenced,uptodate,lru,active,swapbacked
0x02078         21        0  ___UDlA______b____  uptodate,dirty,lru,active,swapbacked
0x0207c         17        0  __RUDlA______b____  referenced,uptodate,dirty,lru,active,swapbacked
0x20000     445525     1740  _________________n  noflags
  total     513968     2007

Thanks,
Fengguang