2011/10/3 Geert Uytterhoeven > On Mon, Oct 3, 2011 at 12:24, KAMEZAWA Hiroyuki > wrote: > > On Sun, 2 Oct 2011 21:57:07 +0800 > > Wei Yang wrote: > > > >> Dear experts, > >> > >> I am viewing the source code of __release_region() in kernel/resource.c. > >> And I have one comment for the performance issue. > >> > >> For example, we have a resource tree like this. > >> 10-89 > >> 20-79 > >> 30-49 > >> 55-59 > >> 60-64 > >> 65-69 > >> 80-89 > >> 100-279 > >> > >> If the caller wants to release a region of [50,59], the original code > will > ^^^^^^^ > Do you really mean [50,59]? > Yes. > I don't think that's allowed, as the tree has [55,59], so you would release > a > larger region that allocated. > So you mean the case I mentioned will not happen? Actually, I believe every developer should pass the resource region which has been allocated. While if some one made a mistake and pass a region which is not allocated before and overlap some "BUSY" region? > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- > geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. > But > when I'm talking to journalists I just say "programmer" or something like > that. > -- Linus Torvalds > -- Wei Yang Help You, Help Me