Commit 058daab7 authored by Jeff Layton's avatar Jeff Layton Committed by Ilya Dryomov

ceph: move to a dedicated slabcache for mds requests

On my machine (x86_64) this struct is 952 bytes, which gets rounded up
to 1024 by kmalloc. Move this to a dedicated slabcache, so we can
allocate them without the extra 72 bytes of overhead per.
Signed-off-by: default avatarJeff Layton <jlayton@kernel.org>
Reviewed-by: default avatarIlya Dryomov <idryomov@gmail.com>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent c36d6414
......@@ -736,7 +736,7 @@ void ceph_mdsc_release_request(struct kref *kref)
put_request_session(req);
ceph_unreserve_caps(req->r_mdsc, &req->r_caps_reservation);
WARN_ON_ONCE(!list_empty(&req->r_wait));
kfree(req);
kmem_cache_free(ceph_mds_request_cachep, req);
}
DEFINE_RB_FUNCS(request, struct ceph_mds_request, r_tid, r_node)
......@@ -2094,8 +2094,9 @@ int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
struct ceph_mds_request *
ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode)
{
struct ceph_mds_request *req = kzalloc(sizeof(*req), GFP_NOFS);
struct ceph_mds_request *req;
req = kmem_cache_zalloc(ceph_mds_request_cachep, GFP_NOFS);
if (!req)
return ERR_PTR(-ENOMEM);
......
......@@ -729,6 +729,7 @@ struct kmem_cache *ceph_cap_flush_cachep;
struct kmem_cache *ceph_dentry_cachep;
struct kmem_cache *ceph_file_cachep;
struct kmem_cache *ceph_dir_file_cachep;
struct kmem_cache *ceph_mds_request_cachep;
static void ceph_inode_init_once(void *foo)
{
......@@ -769,6 +770,10 @@ static int __init init_caches(void)
if (!ceph_dir_file_cachep)
goto bad_dir_file;
ceph_mds_request_cachep = KMEM_CACHE(ceph_mds_request, SLAB_MEM_SPREAD);
if (!ceph_mds_request_cachep)
goto bad_mds_req;
error = ceph_fscache_register();
if (error)
goto bad_fscache;
......@@ -776,6 +781,8 @@ static int __init init_caches(void)
return 0;
bad_fscache:
kmem_cache_destroy(ceph_mds_request_cachep);
bad_mds_req:
kmem_cache_destroy(ceph_dir_file_cachep);
bad_dir_file:
kmem_cache_destroy(ceph_file_cachep);
......@@ -804,6 +811,7 @@ static void destroy_caches(void)
kmem_cache_destroy(ceph_dentry_cachep);
kmem_cache_destroy(ceph_file_cachep);
kmem_cache_destroy(ceph_dir_file_cachep);
kmem_cache_destroy(ceph_mds_request_cachep);
ceph_fscache_unregister();
}
......
......@@ -272,6 +272,7 @@ extern struct kmem_cache *ceph_cap_flush_cachep;
extern struct kmem_cache *ceph_dentry_cachep;
extern struct kmem_cache *ceph_file_cachep;
extern struct kmem_cache *ceph_dir_file_cachep;
extern struct kmem_cache *ceph_mds_request_cachep;
/* ceph_common.c */
extern bool libceph_compatible(void *data);
......
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