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shrinker: convert remaining shrinkers to count/scan API

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Convert the remaining couple of random shrinkers in the tree to the new
API.

Signed-off-by: Dave Chinner <[email protected]>
Signed-off-by: Glauber Costa <[email protected]>
Cc: Marcelo Tosatti <[email protected]>
Cc: Gleb Natapov <[email protected]>
Cc: Chuck Lever <[email protected]>
Cc: J. Bruce Fields <[email protected]>
Cc: Trond Myklebust <[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 10:18:14 +10:00 • committed by Al Viro
commit 70534a739c
2 changed files with 45 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

41
net/sunrpc/auth.c
View file

@ -434,12 +434,13 @@ EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache);
/*
* Remove stale credentials. Avoid sleeping inside the loop.
*/
static int
static long
rpcauth_prune_expired(struct list_head *free, int nr_to_scan)
{
spinlock_t *cache_lock;
struct rpc_cred *cred, *next;
unsigned long expired = jiffies - RPC_AUTH_EXPIRY_MORATORIUM;
long freed = 0;
list_for_each_entry_safe(cred, next, &cred_unused, cr_lru) {
@ -451,10 +452,11 @@ rpcauth_prune_expired(struct list_head *free, int nr_to_scan)
*/
if (time_in_range(cred->cr_expire, expired, jiffies) &&
test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0)
return 0;
break;
list_del_init(&cred->cr_lru);
number_cred_unused--;
freed++;
if (atomic_read(&cred->cr_count) != 0)
continue;
@ -467,29 +469,39 @@ rpcauth_prune_expired(struct list_head *free, int nr_to_scan)
}
spin_unlock(cache_lock);
}
return (number_cred_unused / 100) * sysctl_vfs_cache_pressure;
return freed;
}
/*
* Run memory cache shrinker.
*/
static int
rpcauth_cache_shrinker(struct shrinker *shrink, struct shrink_control *sc)
static unsigned long
rpcauth_cache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
{
LIST_HEAD(free);
int res;
int nr_to_scan = sc->nr_to_scan;
gfp_t gfp_mask = sc->gfp_mask;
unsigned long freed;
if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
return (nr_to_scan == 0) ? 0 : -1;
if ((sc->gfp_mask & GFP_KERNEL) != GFP_KERNEL)
return SHRINK_STOP;
/* nothing left, don't come back */
if (list_empty(&cred_unused))
return 0;
return SHRINK_STOP;
spin_lock(&rpc_credcache_lock);
res = rpcauth_prune_expired(&free, nr_to_scan);
freed = rpcauth_prune_expired(&free, sc->nr_to_scan);
spin_unlock(&rpc_credcache_lock);
rpcauth_destroy_credlist(&free);
return res;
return freed;
}
static unsigned long
rpcauth_cache_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
{
return (number_cred_unused / 100) * sysctl_vfs_cache_pressure;
}
/*
@ -805,7 +817,8 @@ rpcauth_uptodatecred(struct rpc_task *task)
}
static struct shrinker rpc_cred_shrinker = {
.shrink = rpcauth_cache_shrinker,
.count_objects = rpcauth_cache_shrink_count,
.scan_objects = rpcauth_cache_shrink_scan,
.seeks = DEFAULT_SEEKS,
};