diff options
| -rw-r--r-- | fs/cachefiles/Kconfig | 19 | ||||
| -rw-r--r-- | fs/cachefiles/Makefile | 2 | ||||
| -rw-r--r-- | fs/cachefiles/internal.h | 25 | ||||
| -rw-r--r-- | fs/cachefiles/main.c | 7 | ||||
| -rw-r--r-- | fs/cachefiles/namei.c | 13 | ||||
| -rw-r--r-- | fs/cachefiles/proc.c | 114 | ||||
| -rw-r--r-- | fs/fscache/Kconfig | 17 | ||||
| -rw-r--r-- | fs/fscache/Makefile | 1 | ||||
| -rw-r--r-- | fs/fscache/histogram.c | 87 | ||||
| -rw-r--r-- | fs/fscache/internal.h | 24 | ||||
| -rw-r--r-- | fs/fscache/object.c | 5 | ||||
| -rw-r--r-- | fs/fscache/operation.c | 3 | ||||
| -rw-r--r-- | fs/fscache/page.c | 6 | ||||
| -rw-r--r-- | fs/fscache/proc.c | 13 | ||||
| -rw-r--r-- | include/linux/fscache-cache.h | 1 |
15 files changed, 0 insertions, 337 deletions
diff --git a/fs/cachefiles/Kconfig b/fs/cachefiles/Kconfig index ff9ca55a9ae9..6827b40f7ddc 100644 --- a/fs/cachefiles/Kconfig +++ b/fs/cachefiles/Kconfig @@ -19,22 +19,3 @@ config CACHEFILES_DEBUG caching on files module. If this is set, the debugging output may be enabled by setting bits in /sys/modules/cachefiles/parameter/debug or by including a debugging specifier in /etc/cachefilesd.conf. - -config CACHEFILES_HISTOGRAM - bool "Gather latency information on CacheFiles" - depends on CACHEFILES && PROC_FS - help - - This option causes latency information to be gathered on CacheFiles - operation and exported through file: - - /proc/fs/cachefiles/histogram - - The generation of this histogram adds a certain amount of overhead to - execution as there are a number of points at which data is gathered, - and on a multi-CPU system these may be on cachelines that keep - bouncing between CPUs. On the other hand, the histogram may be - useful for debugging purposes. Saying 'N' here is recommended. - - See Documentation/filesystems/caching/cachefiles.rst for more - information. diff --git a/fs/cachefiles/Makefile b/fs/cachefiles/Makefile index 2227dc2d5498..02fd17731769 100644 --- a/fs/cachefiles/Makefile +++ b/fs/cachefiles/Makefile @@ -15,6 +15,4 @@ cachefiles-y := \ security.o \ xattr.o -cachefiles-$(CONFIG_CACHEFILES_HISTOGRAM) += proc.o - obj-$(CONFIG_CACHEFILES) := cachefiles.o diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h index 4ed83aa5253b..0a511c36dab8 100644 --- a/fs/cachefiles/internal.h +++ b/fs/cachefiles/internal.h @@ -181,31 +181,6 @@ extern int cachefiles_check_in_use(struct cachefiles_cache *cache, struct dentry *dir, char *filename); /* - * proc.c - */ -#ifdef CONFIG_CACHEFILES_HISTOGRAM -extern atomic_t cachefiles_lookup_histogram[HZ]; -extern atomic_t cachefiles_mkdir_histogram[HZ]; -extern atomic_t cachefiles_create_histogram[HZ]; - -extern int __init cachefiles_proc_init(void); -extern void cachefiles_proc_cleanup(void); -static inline -void cachefiles_hist(atomic_t histogram[], unsigned long start_jif) -{ - unsigned long jif = jiffies - start_jif; - if (jif >= HZ) - jif = HZ - 1; - atomic_inc(&histogram[jif]); -} - -#else -#define cachefiles_proc_init() (0) -#define cachefiles_proc_cleanup() do {} while (0) -#define cachefiles_hist(hist, start_jif) do {} while (0) -#endif - -/* * rdwr.c */ extern int cachefiles_read_or_alloc_page(struct fscache_retrieval *, diff --git a/fs/cachefiles/main.c b/fs/cachefiles/main.c index ddf0cd58d60c..9c8d34c49b12 100644 --- a/fs/cachefiles/main.c +++ b/fs/cachefiles/main.c @@ -69,15 +69,9 @@ static int __init cachefiles_init(void) goto error_object_jar; } - ret = cachefiles_proc_init(); - if (ret < 0) - goto error_proc; - pr_info("Loaded\n"); return 0; -error_proc: - kmem_cache_destroy(cachefiles_object_jar); error_object_jar: misc_deregister(&cachefiles_dev); error_dev: @@ -94,7 +88,6 @@ static void __exit cachefiles_exit(void) { pr_info("Unloading\n"); - cachefiles_proc_cleanup(); kmem_cache_destroy(cachefiles_object_jar); misc_deregister(&cachefiles_dev); } diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c index 7bf0732ae25c..92aa550dae7e 100644 --- a/fs/cachefiles/namei.c +++ b/fs/cachefiles/namei.c @@ -496,7 +496,6 @@ int cachefiles_walk_to_object(struct cachefiles_object *parent, struct dentry *dir, *next = NULL; struct inode *inode; struct path path; - unsigned long start; const char *name; int ret, nlen; @@ -535,9 +534,7 @@ lookup_again: inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); - start = jiffies; next = lookup_one_len(name, dir, nlen); - cachefiles_hist(cachefiles_lookup_histogram, start); if (IS_ERR(next)) { trace_cachefiles_lookup(object, next, NULL); goto lookup_error; @@ -568,9 +565,7 @@ lookup_again: ret = security_path_mkdir(&path, next, 0); if (ret < 0) goto create_error; - start = jiffies; ret = vfs_mkdir(&init_user_ns, d_inode(dir), next, 0); - cachefiles_hist(cachefiles_mkdir_histogram, start); if (!key) trace_cachefiles_mkdir(object, next, ret); if (ret < 0) @@ -604,10 +599,8 @@ lookup_again: ret = security_path_mknod(&path, next, S_IFREG, 0); if (ret < 0) goto create_error; - start = jiffies; ret = vfs_create(&init_user_ns, d_inode(dir), next, S_IFREG, true); - cachefiles_hist(cachefiles_create_histogram, start); trace_cachefiles_create(object, next, ret); if (ret < 0) goto create_error; @@ -765,7 +758,6 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache, const char *dirname) { struct dentry *subdir; - unsigned long start; struct path path; int ret; @@ -775,9 +767,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache, inode_lock(d_inode(dir)); retry: - start = jiffies; subdir = lookup_one_len(dirname, dir, strlen(dirname)); - cachefiles_hist(cachefiles_lookup_histogram, start); if (IS_ERR(subdir)) { if (PTR_ERR(subdir) == -ENOMEM) goto nomem_d_alloc; @@ -876,7 +866,6 @@ static struct dentry *cachefiles_check_active(struct cachefiles_cache *cache, struct cachefiles_object *object; struct rb_node *_n; struct dentry *victim; - unsigned long start; int ret; //_enter(",%pd/,%s", @@ -885,9 +874,7 @@ static struct dentry *cachefiles_check_active(struct cachefiles_cache *cache, /* look up the victim */ inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); - start = jiffies; victim = lookup_one_len(filename, dir, strlen(filename)); - cachefiles_hist(cachefiles_lookup_histogram, start); if (IS_ERR(victim)) goto lookup_error; diff --git a/fs/cachefiles/proc.c b/fs/cachefiles/proc.c deleted file mode 100644 index 6e67aea0f24e..000000000000 --- a/fs/cachefiles/proc.c +++ /dev/null @@ -1,114 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* CacheFiles statistics - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - */ - -#include <linux/module.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include "internal.h" - -atomic_t cachefiles_lookup_histogram[HZ]; -atomic_t cachefiles_mkdir_histogram[HZ]; -atomic_t cachefiles_create_histogram[HZ]; - -/* - * display the latency histogram - */ -static int cachefiles_histogram_show(struct seq_file *m, void *v) -{ - unsigned long index; - unsigned x, y, z, t; - - switch ((unsigned long) v) { - case 1: - seq_puts(m, "JIFS SECS LOOKUPS MKDIRS CREATES\n"); - return 0; - case 2: - seq_puts(m, "===== ===== ========= ========= =========\n"); - return 0; - default: - index = (unsigned long) v - 3; - x = atomic_read(&cachefiles_lookup_histogram[index]); - y = atomic_read(&cachefiles_mkdir_histogram[index]); - z = atomic_read(&cachefiles_create_histogram[index]); - if (x == 0 && y == 0 && z == 0) - return 0; - - t = (index * 1000) / HZ; - - seq_printf(m, "%4lu 0.%03u %9u %9u %9u\n", index, t, x, y, z); - return 0; - } -} - -/* - * set up the iterator to start reading from the first line - */ -static void *cachefiles_histogram_start(struct seq_file *m, loff_t *_pos) -{ - if ((unsigned long long)*_pos >= HZ + 2) - return NULL; - if (*_pos == 0) - *_pos = 1; - return (void *)(unsigned long) *_pos; -} - -/* - * move to the next line - */ -static void *cachefiles_histogram_next(struct seq_file *m, void *v, loff_t *pos) -{ - (*pos)++; - return (unsigned long long)*pos > HZ + 2 ? - NULL : (void *)(unsigned long) *pos; -} - -/* - * clean up after reading - */ -static void cachefiles_histogram_stop(struct seq_file *m, void *v) -{ -} - -static const struct seq_operations cachefiles_histogram_ops = { - .start = cachefiles_histogram_start, - .stop = cachefiles_histogram_stop, - .next = cachefiles_histogram_next, - .show = cachefiles_histogram_show, -}; - -/* - * initialise the /proc/fs/cachefiles/ directory - */ -int __init cachefiles_proc_init(void) -{ - _enter(""); - - if (!proc_mkdir("fs/cachefiles", NULL)) - goto error_dir; - - if (!proc_create_seq("fs/cachefiles/histogram", S_IFREG | 0444, NULL, - &cachefiles_histogram_ops)) - goto error_histogram; - - _leave(" = 0"); - return 0; - -error_histogram: - remove_proc_entry("fs/cachefiles", NULL); -error_dir: - _leave(" = -ENOMEM"); - return -ENOMEM; -} - -/* - * clean up the /proc/fs/cachefiles/ directory - */ -void cachefiles_proc_cleanup(void) -{ - remove_proc_entry("fs/cachefiles/histogram", NULL); - remove_proc_entry("fs/cachefiles", NULL); -} diff --git a/fs/fscache/Kconfig b/fs/fscache/Kconfig index 92c87d8e0913..5e3a5b3f950d 100644 --- a/fs/fscache/Kconfig +++ b/fs/fscache/Kconfig @@ -29,23 +29,6 @@ config FSCACHE_STATS See Documentation/filesystems/caching/fscache.rst for more information. -config FSCACHE_HISTOGRAM - bool "Gather latency information on local caching" - depends on FSCACHE && PROC_FS - help - This option causes latency information to be gathered on local - caching and exported through file: - - /proc/fs/fscache/histogram - - The generation of this histogram adds a certain amount of overhead to - execution as there are a number of points at which data is gathered, - and on a multi-CPU system these may be on cachelines that keep - bouncing between CPUs. On the other hand, the histogram may be - useful for debugging purposes. Saying 'N' here is recommended. - - See Documentation/filesystems/caching/fscache.rst for more information. - config FSCACHE_DEBUG bool "Debug FS-Cache" depends on FSCACHE diff --git a/fs/fscache/Makefile b/fs/fscache/Makefile index 3b2ffa93ac18..45d5235a449b 100644 --- a/fs/fscache/Makefile +++ b/fs/fscache/Makefile @@ -16,7 +16,6 @@ fscache-y := \ fscache-$(CONFIG_PROC_FS) += proc.o fscache-$(CONFIG_FSCACHE_STATS) += stats.o -fscache-$(CONFIG_FSCACHE_HISTOGRAM) += histogram.o fscache-$(CONFIG_FSCACHE_OBJECT_LIST) += object-list.o obj-$(CONFIG_FSCACHE) := fscache.o diff --git a/fs/fscache/histogram.c b/fs/fscache/histogram.c deleted file mode 100644 index 4e5beeaaf454..000000000000 --- a/fs/fscache/histogram.c +++ /dev/null @@ -1,87 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* FS-Cache latency histogram - * - * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - */ - -#define FSCACHE_DEBUG_LEVEL THREAD -#include <linux/module.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include "internal.h" - -atomic_t fscache_obj_instantiate_histogram[HZ]; -atomic_t fscache_objs_histogram[HZ]; -atomic_t fscache_ops_histogram[HZ]; -atomic_t fscache_retrieval_delay_histogram[HZ]; -atomic_t fscache_retrieval_histogram[HZ]; - -/* - * display the time-taken histogram - */ -static int fscache_histogram_show(struct seq_file *m, void *v) -{ - unsigned long index; - unsigned n[5], t; - - switch ((unsigned long) v) { - case 1: - seq_puts(m, "JIFS SECS OBJ INST OP RUNS OBJ RUNS RETRV DLY RETRIEVLS\n"); - return 0; - case 2: - seq_puts(m, "===== ===== ========= ========= ========= ========= =========\n"); - return 0; - default: - index = (unsigned long) v - 3; - n[0] = atomic_read(&fscache_obj_instantiate_histogram[index]); - n[1] = atomic_read(&fscache_ops_histogram[index]); - n[2] = atomic_read(&fscache_objs_histogram[index]); - n[3] = atomic_read(&fscache_retrieval_delay_histogram[index]); - n[4] = atomic_read(&fscache_retrieval_histogram[index]); - if (!(n[0] | n[1] | n[2] | n[3] | n[4])) - return 0; - - t = (index * 1000) / HZ; - - seq_printf(m, "%4lu 0.%03u %9u %9u %9u %9u %9u\n", - index, t, n[0], n[1], n[2], n[3], n[4]); - return 0; - } -} - -/* - * set up the iterator to start reading from the first line - */ -static void *fscache_histogram_start(struct seq_file *m, loff_t *_pos) -{ - if ((unsigned long long)*_pos >= HZ + 2) - return NULL; - if (*_pos == 0) - *_pos = 1; - return (void *)(unsigned long) *_pos; -} - -/* - * move to the next line - */ -static void *fscache_histogram_next(struct seq_file *m, void *v, loff_t *pos) -{ - (*pos)++; - return (unsigned long long)*pos > HZ + 2 ? - NULL : (void *)(unsigned long) *pos; -} - -/* - * clean up after reading - */ -static void fscache_histogram_stop(struct seq_file *m, void *v) -{ -} - -const struct seq_operations fscache_histogram_ops = { - .start = fscache_histogram_start, - .stop = fscache_histogram_stop, - .next = fscache_histogram_next, - .show = fscache_histogram_show, -}; diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h index 207a6bc81ca9..796678b2b32a 100644 --- a/fs/fscache/internal.h +++ b/fs/fscache/internal.h @@ -64,30 +64,6 @@ extern struct fscache_cookie fscache_fsdef_index; extern struct fscache_cookie_def fscache_fsdef_netfs_def; /* - * histogram.c - */ -#ifdef CONFIG_FSCACHE_HISTOGRAM -extern atomic_t fscache_obj_instantiate_histogram[HZ]; -extern atomic_t fscache_objs_histogram[HZ]; -extern atomic_t fscache_ops_histogram[HZ]; -extern atomic_t fscache_retrieval_delay_histogram[HZ]; -extern atomic_t fscache_retrieval_histogram[HZ]; - -static inline void fscache_hist(atomic_t histogram[], unsigned long start_jif) -{ - unsigned long jif = jiffies - start_jif; - if (jif >= HZ) - jif = HZ - 1; - atomic_inc(&histogram[jif]); -} - -extern const struct seq_operations fscache_histogram_ops; - -#else -#define fscache_hist(hist, start_jif) do {} while (0) -#endif - -/* * main.c */ extern unsigned fscache_defer_lookup; diff --git a/fs/fscache/object.c b/fs/fscache/object.c index cb2146e02cd5..5dbaab2e1262 100644 --- a/fs/fscache/object.c +++ b/fs/fscache/object.c @@ -277,13 +277,10 @@ static void fscache_object_work_func(struct work_struct *work) { struct fscache_object *object = container_of(work, struct fscache_object, work); - unsigned long start; _enter("{OBJ%x}", object->debug_id); - start = jiffies; fscache_object_sm_dispatcher(object); - fscache_hist(fscache_objs_histogram, start); fscache_put_object(object, fscache_obj_put_work); } @@ -436,7 +433,6 @@ static const struct fscache_state *fscache_parent_ready(struct fscache_object *o spin_lock(&parent->lock); parent->n_ops++; parent->n_obj_ops++; - object->lookup_jif = jiffies; spin_unlock(&parent->lock); _leave(""); @@ -596,7 +592,6 @@ static const struct fscache_state *fscache_object_available(struct fscache_objec object->cache->ops->lookup_complete(object); fscache_stat_d(&fscache_n_cop_lookup_complete); - fscache_hist(fscache_obj_instantiate_histogram, object->lookup_jif); fscache_stat(&fscache_n_object_avail); _leave(""); diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c index 4a5651d4904e..433877107700 100644 --- a/fs/fscache/operation.c +++ b/fs/fscache/operation.c @@ -616,7 +616,6 @@ void fscache_op_work_func(struct work_struct *work) { struct fscache_operation *op = container_of(work, struct fscache_operation, work); - unsigned long start; _enter("{OBJ%x OP%x,%d}", op->object->debug_id, op->debug_id, atomic_read(&op->usage)); @@ -624,9 +623,7 @@ void fscache_op_work_func(struct work_struct *work) trace_fscache_op(op->object->cookie, op, fscache_op_work); ASSERT(op->processor != NULL); - start = jiffies; op->processor(op); - fscache_hist(fscache_ops_histogram, start); fscache_put_operation(op); _leave(""); diff --git a/fs/fscache/page.c b/fs/fscache/page.c index 991b0a871744..27df94ef0e0b 100644 --- a/fs/fscache/page.c +++ b/fs/fscache/page.c @@ -289,7 +289,6 @@ static void fscache_release_retrieval_op(struct fscache_operation *_op) ASSERTIFCMP(op->op.state != FSCACHE_OP_ST_INITIALISED, atomic_read(&op->n_pages), ==, 0); - fscache_hist(fscache_retrieval_histogram, op->start_time); if (op->context) fscache_put_context(op->cookie, op->context); @@ -324,7 +323,6 @@ struct fscache_retrieval *fscache_alloc_retrieval( op->mapping = mapping; op->end_io_func = end_io_func; op->context = context; - op->start_time = jiffies; INIT_LIST_HEAD(&op->to_do); /* Pin the netfs read context in case we need to do the actual netfs @@ -340,8 +338,6 @@ struct fscache_retrieval *fscache_alloc_retrieval( */ int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie) { - unsigned long jif; - _enter(""); if (!test_bit(FSCACHE_COOKIE_LOOKING_UP, &cookie->flags)) { @@ -351,7 +347,6 @@ int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie) fscache_stat(&fscache_n_retrievals_wait); - jif = jiffies; if (wait_on_bit(&cookie->flags, FSCACHE_COOKIE_LOOKING_UP, TASK_INTERRUPTIBLE) != 0) { fscache_stat(&fscache_n_retrievals_intr); @@ -362,7 +357,6 @@ int fscache_wait_for_deferred_lookup(struct fscache_cookie *cookie) ASSERT(!test_bit(FSCACHE_COOKIE_LOOKING_UP, &cookie->flags)); smp_rmb(); - fscache_hist(fscache_retrieval_delay_histogram, jif); _leave(" = 0 [dly]"); return 0; } diff --git a/fs/fscache/proc.c b/fs/fscache/proc.c index da51fdfc8641..061df8f61ffc 100644 --- a/fs/fscache/proc.c +++ b/fs/fscache/proc.c @@ -31,12 +31,6 @@ int __init fscache_proc_init(void) goto error_stats; #endif -#ifdef CONFIG_FSCACHE_HISTOGRAM - if (!proc_create_seq("fs/fscache/histogram", S_IFREG | 0444, NULL, - &fscache_histogram_ops)) - goto error_histogram; -#endif - #ifdef CONFIG_FSCACHE_OBJECT_LIST if (!proc_create("fs/fscache/objects", S_IFREG | 0444, NULL, &fscache_objlist_proc_ops)) @@ -49,10 +43,6 @@ int __init fscache_proc_init(void) #ifdef CONFIG_FSCACHE_OBJECT_LIST error_objects: #endif -#ifdef CONFIG_FSCACHE_HISTOGRAM - remove_proc_entry("fs/fscache/histogram", NULL); -error_histogram: -#endif #ifdef CONFIG_FSCACHE_STATS remove_proc_entry("fs/fscache/stats", NULL); error_stats: @@ -73,9 +63,6 @@ void fscache_proc_cleanup(void) #ifdef CONFIG_FSCACHE_OBJECT_LIST remove_proc_entry("fs/fscache/objects", NULL); #endif -#ifdef CONFIG_FSCACHE_HISTOGRAM - remove_proc_entry("fs/fscache/histogram", NULL); -#endif #ifdef CONFIG_FSCACHE_STATS remove_proc_entry("fs/fscache/stats", NULL); #endif diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h index 3235ddbdcc09..fbff0b7e3ef1 100644 --- a/include/linux/fscache-cache.h +++ b/include/linux/fscache-cache.h @@ -147,7 +147,6 @@ struct fscache_retrieval { fscache_rw_complete_t end_io_func; /* function to call on I/O completion */ void *context; /* netfs read context (pinned) */ struct list_head to_do; /* list of things to be done by the backend */ - unsigned long start_time; /* time at which retrieval started */ atomic_t n_pages; /* number of pages to be retrieved */ }; |