diff options
| author |   Hugh Dickins <hugh@veritas.com> | 2005-09-03 15:54:34 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:05:40 -0700 |
| commit | 11d31886dbcb61039ed3789e583d21c6e70960fd (patch) | |
| tree | ddaebfd35080a530a30c56587707c2c5ef452591 /include | |
| parent | [PATCH] swap: move destroy_swap_extents calls (diff) | |
| download | linux-dev-11d31886dbcb61039ed3789e583d21c6e70960fd.tar.xz linux-dev-11d31886dbcb61039ed3789e583d21c6e70960fd.zip | |
[PATCH] swap: swap extent list is ordered
There are several comments that swap's extent_list.prev points to the lowest
extent: that's not so, it's extent_list.next which points to it, as you'd
expect. And a couple of loops in add_swap_extent which go all the way through
the list, when they should just add to the other end.
Fix those up, and let map_swap_page search the list forwards: profiles shows
it to be twice as quick that way - because prefetch works better on how the
structs are typically kmalloc'ed? or because usually more is written to than
read from swap, and swap is allocated ascendingly?
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/swap.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index bfe3e763ccf2..38f288475e67 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -116,8 +116,6 @@ enum { /* * The in-memory structure used to track swap areas. - * extent_list.prev points at the lowest-index extent. That list is - * sorted. */ struct swap_info_struct { unsigned int flags; |