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| author | Hugh Dickins <hugh@veritas.com> | 2009-01-06 14:39:50 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:59:05 -0800 |
| commit | ebebbbe904634b0ca1c674457b399f68db5e05b1 (patch) | |
| tree | 168c6c1193580e40ba1916ebaff822e15e8ee186 /include/linux/swap.h | |
| parent | 81e33971271ec8603fe696731ff9967afb99e729 (diff) | |
| download | linux-ebebbbe904634b0ca1c674457b399f68db5e05b1.tar.gz linux-ebebbbe904634b0ca1c674457b399f68db5e05b1.tar.bz2 linux-ebebbbe904634b0ca1c674457b399f68db5e05b1.zip | |
swapfile: rearrange scan and swap_info
Before making functional changes, rearrange scan_swap_map() to simplify
subsequent diffs. Actually, there is one functional change in there:
leave cluster_nr negative while scanning for a new cluster - resetting it
early increased the likelihood that when we have difficulty finding a free
cluster, another task may come in and try doing exactly the same - just a
waste of cpu.
Before making functional changes, rearrange struct swap_info_struct
slightly: flags will be needed as an unsigned long (for wait_on_bit), next
is a good int to pair with prio, old_block_size is uninteresting so shift
it to the end.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 410c8e473727..9cabb8b21aba 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -133,14 +133,14 @@ enum { * The in-memory structure used to track swap areas. */ struct swap_info_struct { - unsigned int flags; + unsigned long flags; int prio; /* swap priority */ + int next; /* next entry on swap list */ struct file *swap_file; struct block_device *bdev; struct list_head extent_list; struct swap_extent *curr_swap_extent; - unsigned old_block_size; - unsigned short * swap_map; + unsigned short *swap_map; unsigned int lowest_bit; unsigned int highest_bit; unsigned int cluster_next; @@ -148,7 +148,7 @@ struct swap_info_struct { unsigned int pages; unsigned int max; unsigned int inuse_pages; - int next; /* next entry on swap list */ + unsigned int old_block_size; }; struct swap_list_t { |