| commit | be512691036cc989c11d0f418187efbbf14468e6 | [log] [tgz] |
|---|---|---|
| author | NeilBrown <neilb@suse.de> | Tue May 26 09:41:17 2009 +1000 |
| committer | NeilBrown <neilb@suse.de> | Tue May 26 09:41:17 2009 +1000 |
| tree | 557b303a058fc3effdfc15a5cc08867fb0ee6889 | |
| parent | 2b69c83924396ad1eda36fdd267c9d2f360f5555 [diff] |
md: bitmap: improve bitmap maintenance code.
The code for checking which bits in the bitmap can be cleared
has 2 problems:
1/ it repeatedly takes and drops a spinlock, where it would make
more sense to just hold on to it most of the time.
2/ it doesn't make use of some opportunities to skip large sections
of the bitmap
This patch fixes those. It will only affect CPU consumption, not
correctness.
Signed-off-by: NeilBrown <neilb@suse.de>