Convert file hash lock to spinlocks

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/filehash.c b/filehash.c
index a00ac7885721c60b839f0b6c26144f6355b065a9..97c0b3c7633d0e28ab4f44231679301a8d344e6c 100644 (file)
--- a/filehash.c
+++ b/filehash.c
@@ -5,13 +5,15 @@
 #include "flist.h"
 #include "crc/crc16.h"
 
+#include "spinlock.h"
+
 #define HASH_BUCKETS   512
 #define HASH_MASK      (HASH_BUCKETS - 1)
 
 unsigned int file_hash_size = HASH_BUCKETS * sizeof(struct flist_head);
 
 static struct flist_head *file_hash;
-static struct fio_mutex *hash_lock;
+static struct fio_spinlock *hash_lock;
 
 static unsigned short hash(const char *name)
 {
@@ -20,7 +22,7 @@ static unsigned short hash(const char *name)
 
 void remove_file_hash(struct fio_file *f)
 {
-       fio_mutex_down(hash_lock);
+       fio_spin_lock(hash_lock);
 
        if (f->flags & FIO_FILE_HASHED) {
                assert(!flist_empty(&f->hash_list));
@@ -28,7 +30,7 @@ void remove_file_hash(struct fio_file *f)
                f->flags &= ~FIO_FILE_HASHED;
        }
 
-       fio_mutex_up(hash_lock);
+       fio_spin_unlock(hash_lock);
 }
 
 static struct fio_file *__lookup_file_hash(const char *name)
@@ -52,9 +54,9 @@ struct fio_file *lookup_file_hash(const char *name)
 {
        struct fio_file *f;
 
-       fio_mutex_down(hash_lock);
+       fio_spin_lock(hash_lock);
        f = __lookup_file_hash(name);
-       fio_mutex_up(hash_lock);
+       fio_spin_unlock(hash_lock);
        return f;
 }
 
@@ -67,7 +69,7 @@ struct fio_file *add_file_hash(struct fio_file *f)
 
        INIT_FLIST_HEAD(&f->hash_list);
 
-       fio_mutex_down(hash_lock);
+       fio_spin_lock(hash_lock);
 
        alias = __lookup_file_hash(f->file_name);
        if (!alias) {
@@ -75,7 +77,7 @@ struct fio_file *add_file_hash(struct fio_file *f)
                flist_add_tail(&f->hash_list, &file_hash[hash(f->file_name)]);
        }
 
-       fio_mutex_up(hash_lock);
+       fio_spin_unlock(hash_lock);
        return alias;
 }
 
@@ -83,16 +85,17 @@ void file_hash_exit(void)
 {
        unsigned int i, has_entries = 0;
 
-       fio_mutex_down(hash_lock);
+       fio_spin_lock(hash_lock);
        for (i = 0; i < HASH_BUCKETS; i++)
                has_entries += !flist_empty(&file_hash[i]);
-       fio_mutex_up(hash_lock);
+
+       file_hash = NULL;
+       fio_spin_unlock(hash_lock);
 
        if (has_entries)
                log_err("fio: file hash not empty on exit\n");
 
-       file_hash = NULL;
-       fio_mutex_remove(hash_lock);
+       fio_spinlock_remove(hash_lock);
        hash_lock = NULL;
 }
 
@@ -104,5 +107,5 @@ void file_hash_init(void *ptr)
        for (i = 0; i < HASH_BUCKETS; i++)
                INIT_FLIST_HEAD(&file_hash[i]);
 
-       hash_lock = fio_mutex_init(1);
+       hash_lock = fio_spinlock_init();
 }