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shrinker: convert remaining shrinkers to count/scan API 

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

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Glauber Costa <glommer@openvz.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Dave Chinner 2013-08-28 10:18:14 +10:00 committed by Al Viro
parent ea8352c289
commit 70534a739c
2 changed files with 45 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
arch/x86/kvm/mmu.c
View File

@ -4421,13 +4421,12 @@ void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm)
}
}
static int mmu_shrink(struct shrinker *shrink, struct shrink_control *sc)
static unsigned long
mmu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
{
struct kvm *kvm;
int nr_to_scan = sc->nr_to_scan;
if (nr_to_scan == 0)
goto out;
unsigned long freed = 0;
raw_spin_lock(&kvm_lock);
@ -4462,25 +4461,37 @@ static int mmu_shrink(struct shrinker *shrink, struct shrink_control *sc)
goto unlock;
}
prepare_zap_oldest_mmu_page(kvm, &invalid_list);
if (prepare_zap_oldest_mmu_page(kvm, &invalid_list))
freed++;
kvm_mmu_commit_zap_page(kvm, &invalid_list);
unlock:
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
/*
* unfair on small ones
* per-vm shrinkers cry out
* sadness comes quickly
*/
list_move_tail(&kvm->vm_list, &vm_list);
break;
}
raw_spin_unlock(&kvm_lock);
return freed;
out:
}
static unsigned long
mmu_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
{
return percpu_counter_read_positive(&kvm_total_used_mmu_pages);
}
static struct shrinker mmu_shrinker = {
.shrink = mmu_shrink,
.count_objects = mmu_shrink_count,
.scan_objects = mmu_shrink_scan,
.seeks = DEFAULT_SEEKS * 10,
};

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,
};