NeilBrown 8311c29d40 md: reduce CPU wastage on idle md array with a write-intent bitmap ... On an md array with a write-intent bitmap, a thread wakes up every few seconds and scans the bitmap looking for work to do. If the array is idle, there will be no work to do, but a lot of scanning is done to discover this. So cache the fact that the bitmap is completely clean, and avoid scanning the whole bitmap when the cache is known to be clean. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-03-04 16:35:17 -08:00
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bitmap.h	md: reduce CPU wastage on idle md array with a write-intent bitmap	2008-03-04 16:35:17 -08:00
Kbuild
linear.h
md_k.h	md: change ITERATE_RDEV_GENERIC to rdev_for_each_list, and remove ITERATE_RDEV_PENDING.	2008-02-06 10:41:19 -08:00
md_p.h
md_u.h
md.h
multipath.h
raid0.h
raid1.h
raid5.h	md: handle_stripe5 - add request/completion logic for async read ops	2007-07-13 08:06:17 -07:00
raid10.h
xor.h	async_tx: add the async_tx api	2007-07-13 08:06:14 -07:00