* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include <lustre_fid.h>
#include <libcfs/list.h>
#include <libcfs/libcfs_hash.h> /* for cfs_hash stuff */
-/* lu_time_global_{init,fini}() */
-#include <lu_time.h>
-
#include <cl_object.h>
#include "cl_internal.h"
/* XXX hard coded GFP_* mask. */
INIT_RADIX_TREE(&h->coh_tree, GFP_ATOMIC);
CFS_INIT_LIST_HEAD(&h->coh_locks);
+ h->coh_page_bufsize = ALIGN(sizeof(struct cl_page), 8);
}
RETURN(result);
}
void cache_stats_init(struct cache_stats *cs, const char *name)
{
+ int i;
+
cs->cs_name = name;
- cfs_atomic_set(&cs->cs_lookup, 0);
- cfs_atomic_set(&cs->cs_hit, 0);
- cfs_atomic_set(&cs->cs_total, 0);
- cfs_atomic_set(&cs->cs_busy, 0);
+ for (i = 0; i < CS_NR; i++)
+ cfs_atomic_set(&cs->cs_stats[i], 0);
}
int cache_stats_print(const struct cache_stats *cs,
char *page, int count, int h)
{
- int nob = 0;
-/*
- lookup hit total cached create
- env: ...... ...... ...... ...... ......
-*/
- if (h)
- nob += snprintf(page, count,
- " lookup hit total busy create\n");
-
- nob += snprintf(page + nob, count - nob,
- "%5.5s: %6u %6u %6u %6u %6u",
- cs->cs_name,
- cfs_atomic_read(&cs->cs_lookup),
- cfs_atomic_read(&cs->cs_hit),
- cfs_atomic_read(&cs->cs_total),
- cfs_atomic_read(&cs->cs_busy),
- cfs_atomic_read(&cs->cs_created));
- return nob;
+ int nob = 0;
+ int i;
+ /*
+ * lookup hit total cached create
+ * env: ...... ...... ...... ...... ......
+ */
+ if (h) {
+ const char *names[CS_NR] = CS_NAMES;
+
+ nob += snprintf(page + nob, count - nob, "%6s", " ");
+ for (i = 0; i < CS_NR; i++)
+ nob += snprintf(page + nob, count - nob,
+ "%8s", names[i]);
+ nob += snprintf(page + nob, count - nob, "\n");
+ }
+
+ nob += snprintf(page + nob, count - nob, "%5.5s:", cs->cs_name);
+ for (i = 0; i < CS_NR; i++)
+ nob += snprintf(page + nob, count - nob, "%8u",
+ cfs_atomic_read(&cs->cs_stats[i]));
+ return nob;
}
/**
static struct cache_stats cl_env_stats = {
.cs_name = "envs",
- .cs_created = CFS_ATOMIC_INIT(0),
- .cs_lookup = CFS_ATOMIC_INIT(0),
- .cs_hit = CFS_ATOMIC_INIT(0),
- .cs_total = CFS_ATOMIC_INIT(0),
- .cs_busy = CFS_ATOMIC_INIT(0)
+ .cs_stats = { CFS_ATOMIC_INIT(0), }
};
/**
* bz20044, bz22683.
*/
-static CFS_LIST_HEAD(cl_envs);
-static unsigned cl_envs_cached_nr = 0;
-static unsigned cl_envs_cached_max = 128; /* XXX: prototype: arbitrary limit
- * for now. */
-static DEFINE_SPINLOCK(cl_envs_guard);
-
struct cl_env {
void *ce_magic;
struct lu_env ce_lu;
void *ce_debug;
};
-#define CL_ENV_INC(counter) cfs_atomic_inc(&cl_env_stats.counter)
+#ifdef CONFIG_DEBUG_PAGESTATE_TRACKING
+#define CL_ENV_INC(counter) cfs_atomic_inc(&cl_env_stats.cs_stats[CS_##counter])
-#define CL_ENV_DEC(counter) \
- do { \
- LASSERT(cfs_atomic_read(&cl_env_stats.counter) > 0); \
- cfs_atomic_dec(&cl_env_stats.counter); \
- } while (0)
+#define CL_ENV_DEC(counter) do { \
+ LASSERT(cfs_atomic_read(&cl_env_stats.cs_stats[CS_##counter]) > 0); \
+ cfs_atomic_dec(&cl_env_stats.cs_stats[CS_##counter]); \
+} while (0)
+#else
+#define CL_ENV_INC(counter)
+#define CL_ENV_DEC(counter)
+#endif
static void cl_env_init0(struct cl_env *cle, void *debug)
{
cle->ce_ref = 1;
cle->ce_debug = debug;
- CL_ENV_INC(cs_busy);
+ CL_ENV_INC(busy);
}
OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
env = ERR_PTR(rc);
} else {
- CL_ENV_INC(cs_created);
- CL_ENV_INC(cs_total);
+ CL_ENV_INC(create);
+ CL_ENV_INC(total);
}
} else
env = ERR_PTR(-ENOMEM);
static void cl_env_fini(struct cl_env *cle)
{
- CL_ENV_DEC(cs_total);
+ CL_ENV_DEC(total);
lu_context_fini(&cle->ce_lu.le_ctx);
lu_context_fini(&cle->ce_ses);
OBD_SLAB_FREE_PTR(cle, cl_env_kmem);
}
-static struct lu_env *cl_env_obtain(void *debug)
-{
- struct cl_env *cle;
- struct lu_env *env;
-
- ENTRY;
- spin_lock(&cl_envs_guard);
- LASSERT(equi(cl_envs_cached_nr == 0, cfs_list_empty(&cl_envs)));
- if (cl_envs_cached_nr > 0) {
- int rc;
-
- cle = container_of(cl_envs.next, struct cl_env, ce_linkage);
- cfs_list_del_init(&cle->ce_linkage);
- cl_envs_cached_nr--;
- spin_unlock(&cl_envs_guard);
-
- env = &cle->ce_lu;
- rc = lu_env_refill(env);
- if (rc == 0) {
- cl_env_init0(cle, debug);
- lu_context_enter(&env->le_ctx);
- lu_context_enter(&cle->ce_ses);
- } else {
- cl_env_fini(cle);
- env = ERR_PTR(rc);
- }
- } else {
- spin_unlock(&cl_envs_guard);
- env = cl_env_new(lu_context_tags_default,
- lu_session_tags_default, debug);
- }
- RETURN(env);
-}
-
static inline struct cl_env *cl_env_container(struct lu_env *env)
{
return container_of(env, struct cl_env, ce_lu);
struct lu_env *env;
struct cl_env *cle;
- CL_ENV_INC(cs_lookup);
+ CL_ENV_INC(lookup);
/* check that we don't go far from untrusted pointer */
CLASSERT(offsetof(struct cl_env, ce_magic) == 0);
env = NULL;
cle = cl_env_fetch();
if (cle != NULL) {
- CL_ENV_INC(cs_hit);
+ CL_ENV_INC(hit);
env = &cle->ce_lu;
*refcheck = ++cle->ce_ref;
}
* Returns lu_env: if there already is an environment associated with the
* current thread, it is returned, otherwise, new environment is allocated.
*
- * Allocations are amortized through the global cache of environments.
- *
* \param refcheck pointer to a counter used to detect environment leaks. In
* the usual case cl_env_get() and cl_env_put() are called in the same lexical
* scope and pointer to the same integer is passed as \a refcheck. This is
env = cl_env_peek(refcheck);
if (env == NULL) {
- env = cl_env_obtain(__builtin_return_address(0));
+ env = cl_env_new(lu_context_tags_default,
+ lu_session_tags_default,
+ __builtin_return_address(0));
+
if (!IS_ERR(env)) {
struct cl_env *cle;
}
/**
- * Finalizes and frees a given number of cached environments. This is done to
- * (1) free some memory (not currently hooked into VM), or (2) release
- * references to modules.
- */
-unsigned cl_env_cache_purge(unsigned nr)
-{
- struct cl_env *cle;
-
- ENTRY;
- spin_lock(&cl_envs_guard);
- for (; !cfs_list_empty(&cl_envs) && nr > 0; --nr) {
- cle = container_of(cl_envs.next, struct cl_env, ce_linkage);
- cfs_list_del_init(&cle->ce_linkage);
- LASSERT(cl_envs_cached_nr > 0);
- cl_envs_cached_nr--;
- spin_unlock(&cl_envs_guard);
-
- cl_env_fini(cle);
- spin_lock(&cl_envs_guard);
- }
- LASSERT(equi(cl_envs_cached_nr == 0, cfs_list_empty(&cl_envs)));
- spin_unlock(&cl_envs_guard);
- RETURN(nr);
-}
-EXPORT_SYMBOL(cl_env_cache_purge);
-
-/**
* Release an environment.
*
* Decrement \a env reference counter. When counter drops to 0, nothing in
CDEBUG(D_OTHER, "%d@%p\n", cle->ce_ref, cle);
if (--cle->ce_ref == 0) {
- CL_ENV_DEC(cs_busy);
+ CL_ENV_DEC(busy);
cl_env_detach(cle);
cle->ce_debug = NULL;
cl_env_exit(cle);
- /*
- * Don't bother to take a lock here.
- *
- * Return environment to the cache only when it was allocated
- * with the standard tags.
- */
- if (cl_envs_cached_nr < cl_envs_cached_max &&
- (env->le_ctx.lc_tags & ~LCT_HAS_EXIT) == LCT_CL_THREAD &&
- (env->le_ses->lc_tags & ~LCT_HAS_EXIT) == LCT_SESSION) {
- spin_lock(&cl_envs_guard);
- cfs_list_add(&cle->ce_linkage, &cl_envs);
- cl_envs_cached_nr++;
- spin_unlock(&cl_envs_guard);
- } else
- cl_env_fini(cle);
+ cl_env_fini(cle);
}
}
EXPORT_SYMBOL(cl_env_put);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff