Re: [PATCH 2/5] Light Fragmentation Avoidance V20: 002_usemap

[Mel Gorman]

On Tue, 22 Nov 2005, KAMEZAWA Hiroyuki wrote:

> Mel Gorman wrote:
> > > #define PG_checked               8      /* kill me in 2.5.<early>. */
> > >
> > > ?
> > >
> > > At least PG_uncached isn't used on many architectures too, so could
> > > be reused. I don't know why those that use it don't check VMAs instead.
> > >
> >
> >
> > PG_unchecked appears to be totally unused. It's only users are the macros
> > that manipulate the bit and mm/page_alloc.c . It appears it has been a
> > long time since it was used to it is a canditate for reuse.
> >
>
> Just a notification..
> from 2.6.14
>
> PageUncached      375 include/asm-ia64/uaccess.h       if (PageUncached(page))
> PageUncached      393 include/asm-ia64/uaccess.h       if (PageUncached(page))
>
> This is used by /dev/mem
>
>
> PageChecked       196 fs/afs/dir.c     if (!PageChecked(page))
> PageChecked       169 fs/ext2/dir.c    if (!PageChecked(page))
> PageChecked      1372 fs/ext3/inode.c  if (!page_has_buffers(page) ||
> PageChecked(page)) {
> PageChecked      1441 fs/ext3/inode.c  WARN_ON(PageChecked(page));
> PageChecked      2350 fs/reiserfs/inode.c      int checked =
> PageChecked(page);
> PageChecked      2853 fs/reiserfs/inode.c      WARN_ON(PageChecked(page));
>
> This is used by fs, now.
>

d'oh. I was looking for the flags, not the macros :(

-- 
Mel Gorman
Part-time Phd Student                          Java Applications Developer
University of Limerick                         IBM Dublin Software Lab
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