From: Jens Axboe <jens.axboe@oracle.com>
Date: Thu, 12 Jun 2008 09:53:57 +0000 (+0200)
Subject: Convert file hash lock to spinlocks
X-Git-Tag: fio-1.22-rc1~22
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=0ec7b3c9a0926e6377bd145206bb9f6a70be610d

Convert file hash lock to spinlocks

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

diff --git a/filehash.c b/filehash.c
index a00ac788..97c0b3c7 100644
--- 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();
 }