Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / fs / jbd2 / journal.c

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index f837ba953529690e9de45c1e1731470897edeeb4..97e73469b2c48f0ed1104d5a12e1ddb54102983e 100644 (file)
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -43,6 +43,7 @@
 #include <linux/vmalloc.h>
 #include <linux/backing-dev.h>
 #include <linux/bitops.h>
+#include <linux/ratelimit.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/jbd2.h>
@@ -93,6 +94,7 @@ EXPORT_SYMBOL(jbd2_journal_file_inode);
 EXPORT_SYMBOL(jbd2_journal_init_jbd_inode);
 EXPORT_SYMBOL(jbd2_journal_release_jbd_inode);
 EXPORT_SYMBOL(jbd2_journal_begin_ordered_truncate);
+EXPORT_SYMBOL(jbd2_inode_cache);
 
 static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *);
 static void __journal_abort_soft (journal_t *journal, int errno);
@@ -471,7 +473,8 @@ int __jbd2_log_space_left(journal_t *journal)
 }
 
 /*
- * Called under j_state_lock.  Returns true if a transaction commit was started.
+ * Called with j_state_lock locked for writing.
+ * Returns true if a transaction commit was started.
  */
 int __jbd2_log_start_commit(journal_t *journal, tid_t target)
 {
@@ -518,11 +521,13 @@ int jbd2_journal_force_commit_nested(journal_t *journal)
 {
        transaction_t *transaction = NULL;
        tid_t tid;
+       int need_to_start = 0;
 
        read_lock(&journal->j_state_lock);
        if (journal->j_running_transaction && !current->journal_info) {
                transaction = journal->j_running_transaction;
-               __jbd2_log_start_commit(journal, transaction->t_tid);
+               if (!tid_geq(journal->j_commit_request, transaction->t_tid))
+                       need_to_start = 1;
        } else if (journal->j_committing_transaction)
                transaction = journal->j_committing_transaction;
 
@@ -533,6 +538,8 @@ int jbd2_journal_force_commit_nested(journal_t *journal)
 
        tid = transaction->t_tid;
        read_unlock(&journal->j_state_lock);
+       if (need_to_start)
+               jbd2_log_start_commit(journal, tid);
        jbd2_log_wait_commit(journal, tid);
        return 1;
 }
@@ -827,7 +834,7 @@ static journal_t * journal_init_common (void)
 
        journal = kzalloc(sizeof(*journal), GFP_KERNEL);
        if (!journal)
-               goto fail;
+               return NULL;
 
        init_waitqueue_head(&journal->j_wait_transaction_locked);
        init_waitqueue_head(&journal->j_wait_logspace);
@@ -852,14 +859,12 @@ static journal_t * journal_init_common (void)
        err = jbd2_journal_init_revoke(journal, JOURNAL_REVOKE_DEFAULT_HASH);
        if (err) {
                kfree(journal);
-               goto fail;
+               return NULL;
        }
 
        spin_lock_init(&journal->j_history_lock);
 
        return journal;
-fail:
-       return NULL;
 }
 
 /* jbd2_journal_init_dev and jbd2_journal_init_inode:
@@ -1982,7 +1987,6 @@ static void jbd2_journal_destroy_jbd2_journal_head_cache(void)
 static struct journal_head *journal_alloc_journal_head(void)
 {
        struct journal_head *ret;
-       static unsigned long last_warning;
 
 #ifdef CONFIG_JBD2_DEBUG
        atomic_inc(&nr_journal_heads);
@@ -1990,11 +1994,7 @@ static struct journal_head *journal_alloc_journal_head(void)
        ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS);
        if (!ret) {
                jbd_debug(1, "out of memory for journal_head\n");
-               if (time_after(jiffies, last_warning + 5*HZ)) {
-                       printk(KERN_NOTICE "ENOMEM in %s, retrying.\n",
-                              __func__);
-                       last_warning = jiffies;
-               }
+               pr_notice_ratelimited("ENOMEM in %s, retrying.\n", __func__);
                while (!ret) {
                        yield();
                        ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS);
@@ -2292,17 +2292,19 @@ static void __exit jbd2_remove_jbd_stats_proc_entry(void)
 
 #endif
 
-struct kmem_cache *jbd2_handle_cache;
+struct kmem_cache *jbd2_handle_cache, *jbd2_inode_cache;
 
 static int __init journal_init_handle_cache(void)
 {
-       jbd2_handle_cache = kmem_cache_create("jbd2_journal_handle",
-                               sizeof(handle_t),
-                               0,              /* offset */
-                               SLAB_TEMPORARY, /* flags */
-                               NULL);          /* ctor */
+       jbd2_handle_cache = KMEM_CACHE(jbd2_journal_handle, SLAB_TEMPORARY);
        if (jbd2_handle_cache == NULL) {
-               printk(KERN_EMERG "JBD: failed to create handle cache\n");
+               printk(KERN_EMERG "JBD2: failed to create handle cache\n");
+               return -ENOMEM;
+       }
+       jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0);
+       if (jbd2_inode_cache == NULL) {
+               printk(KERN_EMERG "JBD2: failed to create inode cache\n");
+               kmem_cache_destroy(jbd2_handle_cache);
                return -ENOMEM;
        }
        return 0;
@@ -2312,6 +2314,9 @@ static void jbd2_journal_destroy_handle_cache(void)
 {
        if (jbd2_handle_cache)
                kmem_cache_destroy(jbd2_handle_cache);
+       if (jbd2_inode_cache)
+               kmem_cache_destroy(jbd2_inode_cache);
+
 }
 
 /*