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shrinker: convert superblock shrinkers to new API

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Convert superblock shrinker to use the new count/scan API, and propagate
the API changes through to the filesystem callouts.  The filesystem
callouts already use a count/scan API, so it's just changing counters to
longs to match the VM API.

This requires the dentry and inode shrinker callouts to be converted to
the count/scan API.  This is mainly a mechanical change.

[[email protected]: use mult_frac for fractional proportions, build fixes]
Signed-off-by: Dave Chinner <[email protected]>
Signed-off-by: Glauber Costa <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Cc: "Theodore Ts'o" <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Artem Bityutskiy <[email protected]>
Cc: Arve Hjønnevåg <[email protected]>
Cc: Carlos Maiolino <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Chuck Lever <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Gleb Natapov <[email protected]>
Cc: Greg Thelen <[email protected]>
Cc: J. Bruce Fields <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Jerome Glisse <[email protected]>
Cc: John Stultz <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Marcelo Tosatti <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: Thomas Hellstrom <[email protected]>
Cc: Trond Myklebust <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Dave Chinner 2013-08-28 10:17:57 +10:00 • committed by Al Viro
commit 0a234c6dcb
8 changed files with 70 additions and 48 deletions
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7
fs/inode.c
View file

@ -706,10 +706,11 @@ static int can_unuse(struct inode *inode)
* LRU does not have strict ordering. Hence we don't want to reclaim inodes
* with this flag set because they are the inodes that are out of order.
*/
void prune_icache_sb(struct super_block *sb, int nr_to_scan)
long prune_icache_sb(struct super_block *sb, unsigned long nr_to_scan)
{
LIST_HEAD(freeable);
int nr_scanned;
long nr_scanned;
long freed = 0;
unsigned long reap = 0;
spin_lock(&sb->s_inode_lru_lock);
@ -779,6 +780,7 @@ void prune_icache_sb(struct super_block *sb, int nr_to_scan)
list_move(&inode->i_lru, &freeable);
sb->s_nr_inodes_unused--;
this_cpu_dec(nr_unused);
freed++;
}
if (current_is_kswapd())
__count_vm_events(KSWAPD_INODESTEAL, reap);
@ -789,6 +791,7 @@ void prune_icache_sb(struct super_block *sb, int nr_to_scan)
current->reclaim_state->reclaimed_slab += reap;
dispose_list(&freeable);
return freed;
}
static void __wait_on_freeing_inode(struct inode *inode);