linux-ext4 - - jbd-tidy-up-revoke-cache-initialisation-and-destruction.patch removed from -mm tree

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Message-Id: <200805100045.m4A0j45l001106@imap1.linux-foundation.org>
Date:	Fri, 09 May 2008 17:34:09 -0700
From:	akpm@...ux-foundation.org
To:	duaneg@...da.com, linux-ext4@...r.kernel.org,
	mm-commits@...r.kernel.org
Subject: - jbd-tidy-up-revoke-cache-initialisation-and-destruction.patch removed from -mm tree


The patch titled
     jbd: tidy up revoke cache initialisation and destruction
has been removed from the -mm tree.  Its filename was
     jbd-tidy-up-revoke-cache-initialisation-and-destruction.patch

This patch was dropped because it had testing failures

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: jbd: tidy up revoke cache initialisation and destruction
From: "Duane Griffin" <duaneg@...da.com>

Make revoke cache destruction safe to call if initialisation fails partially
or entirely.  This allows it to be used to cleanup in the case of
initialisation failure, simplifying that code slightly.

Signed-off-by: Duane Griffin <duaneg@...da.com>
Cc: <linux-ext4@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 fs/jbd/revoke.c |   36 ++++++++++++++++++++++--------------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff -puN fs/jbd/revoke.c~jbd-tidy-up-revoke-cache-initialisation-and-destruction fs/jbd/revoke.c
--- a/fs/jbd/revoke.c~jbd-tidy-up-revoke-cache-initialisation-and-destruction
+++ a/fs/jbd/revoke.c
@@ -166,33 +166,41 @@ static struct jbd_revoke_record_s *find_
 	return NULL;
 }
 
+void journal_destroy_revoke_caches(void)
+{
+	if (revoke_record_cache) {
+		kmem_cache_destroy(revoke_record_cache);
+		revoke_record_cache = NULL;
+	}
+	if (revoke_table_cache) {
+		kmem_cache_destroy(revoke_table_cache);
+		revoke_table_cache = NULL;
+	}
+}
+
 int __init journal_init_revoke_caches(void)
 {
+	J_ASSERT(!revoke_record_cache);
+	J_ASSERT(!revoke_table_cache);
+
 	revoke_record_cache = kmem_cache_create("revoke_record",
 					   sizeof(struct jbd_revoke_record_s),
 					   0,
 					   SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY,
 					   NULL);
 	if (!revoke_record_cache)
-		return -ENOMEM;
+		goto record_cache_failure;
 
 	revoke_table_cache = kmem_cache_create("revoke_table",
 					   sizeof(struct jbd_revoke_table_s),
 					   0, SLAB_TEMPORARY, NULL);
-	if (!revoke_table_cache) {
-		kmem_cache_destroy(revoke_record_cache);
-		revoke_record_cache = NULL;
-		return -ENOMEM;
-	}
-	return 0;
-}
+	if (!revoke_table_cache)
+		goto table_cache_failure;
 
-void journal_destroy_revoke_caches(void)
-{
-	kmem_cache_destroy(revoke_record_cache);
-	revoke_record_cache = NULL;
-	kmem_cache_destroy(revoke_table_cache);
-	revoke_table_cache = NULL;
+table_cache_failure:
+	journal_destroy_revoke_caches();
+record_cache_failure:
+	return -ENOMEM;
 }
 
 static struct jbd_revoke_table_s *journal_init_revoke_table(int hash_size)
_

Patches currently in -mm which might be from duaneg@...da.com are

jbd-tidy-up-revoke-cache-initialisation-and-destruction.patch
jbd-replace-potentially-false-assertion-with-if-block.patch

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