From: Christoph Hellwig <hch@lst.de>
To: akpm@osdl.org, viro@ftp.linux.org.uk
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH 1/4] hugetlbfs: move free_inodes accounting
Date: Wed, 21 Sep 2005 11:21:56 +0200 [thread overview]
Message-ID: <20050921092156.GA22544@lst.de> (raw)
Move hugetlbfs accounting into ->alloc_inode / ->destroy_inode. This
keeps the code simpler, fixes a loeak where a failing inode allocation
wouldn't decrement the counter and moves hugetlbfs_delete_inode and
hugetlbfs_forget_inode closer to their generic counterparts.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Index: linux-2.6/fs/hugetlbfs/inode.c
===================================================================
--- linux-2.6.orig/fs/hugetlbfs/inode.c 2005-09-18 13:47:32.000000000 +0200
+++ linux-2.6/fs/hugetlbfs/inode.c 2005-09-19 12:41:37.000000000 +0200
@@ -224,8 +224,6 @@
static void hugetlbfs_delete_inode(struct inode *inode)
{
- struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(inode->i_sb);
-
hlist_del_init(&inode->i_hash);
list_del_init(&inode->i_list);
list_del_init(&inode->i_sb_list);
@@ -238,12 +236,6 @@
security_inode_delete(inode);
- if (sbinfo->free_inodes >= 0) {
- spin_lock(&sbinfo->stat_lock);
- sbinfo->free_inodes++;
- spin_unlock(&sbinfo->stat_lock);
- }
-
clear_inode(inode);
destroy_inode(inode);
}
@@ -251,7 +243,6 @@
static void hugetlbfs_forget_inode(struct inode *inode)
{
struct super_block *super_block = inode->i_sb;
- struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(super_block);
if (hlist_unhashed(&inode->i_hash))
goto out_truncate;
@@ -278,12 +269,6 @@
if (inode->i_data.nrpages)
truncate_hugepages(&inode->i_data, 0);
- if (sbinfo->free_inodes >= 0) {
- spin_lock(&sbinfo->stat_lock);
- sbinfo->free_inodes++;
- spin_unlock(&sbinfo->stat_lock);
- }
-
clear_inode(inode);
destroy_inode(inode);
}
@@ -379,17 +364,6 @@
gid_t gid, int mode, dev_t dev)
{
struct inode *inode;
- struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb);
-
- if (sbinfo->free_inodes >= 0) {
- spin_lock(&sbinfo->stat_lock);
- if (!sbinfo->free_inodes) {
- spin_unlock(&sbinfo->stat_lock);
- return NULL;
- }
- sbinfo->free_inodes--;
- spin_unlock(&sbinfo->stat_lock);
- }
inode = new_inode(sb);
if (inode) {
@@ -531,29 +505,51 @@
}
}
+static inline int hugetlbfs_inc_free_inodes(struct hugetlbfs_sb_info *sbinfo)
+{
+ if (sbinfo->free_inodes >= 0) {
+ spin_lock(&sbinfo->stat_lock);
+ if (unlikely(!sbinfo->free_inodes)) {
+ spin_unlock(&sbinfo->stat_lock);
+ return 0;
+ }
+ sbinfo->free_inodes--;
+ spin_unlock(&sbinfo->stat_lock);
+ }
+
+ return 1;
+}
+
+static void hugetlbfs_dec_free_inodes(struct hugetlbfs_sb_info *sbinfo)
+{
+ if (sbinfo->free_inodes >= 0) {
+ spin_lock(&sbinfo->stat_lock);
+ sbinfo->free_inodes++;
+ spin_unlock(&sbinfo->stat_lock);
+ }
+}
+
+
static kmem_cache_t *hugetlbfs_inode_cachep;
static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
{
+ struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb);
struct hugetlbfs_inode_info *p;
+ if (unlikely(!hugetlbfs_inc_free_inodes(sbinfo)))
+ return NULL;
p = kmem_cache_alloc(hugetlbfs_inode_cachep, SLAB_KERNEL);
- if (!p)
+ if (unlikely(!p)) {
+ hugetlbfs_dec_free_inodes(sbinfo);
return NULL;
+ }
return &p->vfs_inode;
}
-static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
-{
- struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
-
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&ei->vfs_inode);
-}
-
static void hugetlbfs_destroy_inode(struct inode *inode)
{
+ hugetlbfs_dec_free_inodes(HUGETLBFS_SB(inode->i_sb));
mpol_free_shared_policy(&HUGETLBFS_I(inode)->policy);
kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
}
@@ -565,6 +561,16 @@
.set_page_dirty = hugetlbfs_set_page_dirty,
};
+
+static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
+{
+ struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+ inode_init_once(&ei->vfs_inode);
+}
+
struct file_operations hugetlbfs_file_operations = {
.mmap = hugetlbfs_file_mmap,
.fsync = simple_sync_file,
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: akpm@osdl.org, viro@ftp.linux.org.uk
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH 1/4] hugetlbfs: move free_inodes accounting
Date: Wed, 21 Sep 2005 11:21:56 +0200 [thread overview]
Message-ID: <20050921092156.GA22544@lst.de> (raw)
Move hugetlbfs accounting into ->alloc_inode / ->destroy_inode. This
keeps the code simpler, fixes a loeak where a failing inode allocation
wouldn't decrement the counter and moves hugetlbfs_delete_inode and
hugetlbfs_forget_inode closer to their generic counterparts.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Index: linux-2.6/fs/hugetlbfs/inode.c
===================================================================
--- linux-2.6.orig/fs/hugetlbfs/inode.c 2005-09-18 13:47:32.000000000 +0200
+++ linux-2.6/fs/hugetlbfs/inode.c 2005-09-19 12:41:37.000000000 +0200
@@ -224,8 +224,6 @@
static void hugetlbfs_delete_inode(struct inode *inode)
{
- struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(inode->i_sb);
-
hlist_del_init(&inode->i_hash);
list_del_init(&inode->i_list);
list_del_init(&inode->i_sb_list);
@@ -238,12 +236,6 @@
security_inode_delete(inode);
- if (sbinfo->free_inodes >= 0) {
- spin_lock(&sbinfo->stat_lock);
- sbinfo->free_inodes++;
- spin_unlock(&sbinfo->stat_lock);
- }
-
clear_inode(inode);
destroy_inode(inode);
}
@@ -251,7 +243,6 @@
static void hugetlbfs_forget_inode(struct inode *inode)
{
struct super_block *super_block = inode->i_sb;
- struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(super_block);
if (hlist_unhashed(&inode->i_hash))
goto out_truncate;
@@ -278,12 +269,6 @@
if (inode->i_data.nrpages)
truncate_hugepages(&inode->i_data, 0);
- if (sbinfo->free_inodes >= 0) {
- spin_lock(&sbinfo->stat_lock);
- sbinfo->free_inodes++;
- spin_unlock(&sbinfo->stat_lock);
- }
-
clear_inode(inode);
destroy_inode(inode);
}
@@ -379,17 +364,6 @@
gid_t gid, int mode, dev_t dev)
{
struct inode *inode;
- struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb);
-
- if (sbinfo->free_inodes >= 0) {
- spin_lock(&sbinfo->stat_lock);
- if (!sbinfo->free_inodes) {
- spin_unlock(&sbinfo->stat_lock);
- return NULL;
- }
- sbinfo->free_inodes--;
- spin_unlock(&sbinfo->stat_lock);
- }
inode = new_inode(sb);
if (inode) {
@@ -531,29 +505,51 @@
}
}
+static inline int hugetlbfs_inc_free_inodes(struct hugetlbfs_sb_info *sbinfo)
+{
+ if (sbinfo->free_inodes >= 0) {
+ spin_lock(&sbinfo->stat_lock);
+ if (unlikely(!sbinfo->free_inodes)) {
+ spin_unlock(&sbinfo->stat_lock);
+ return 0;
+ }
+ sbinfo->free_inodes--;
+ spin_unlock(&sbinfo->stat_lock);
+ }
+
+ return 1;
+}
+
+static void hugetlbfs_dec_free_inodes(struct hugetlbfs_sb_info *sbinfo)
+{
+ if (sbinfo->free_inodes >= 0) {
+ spin_lock(&sbinfo->stat_lock);
+ sbinfo->free_inodes++;
+ spin_unlock(&sbinfo->stat_lock);
+ }
+}
+
+
static kmem_cache_t *hugetlbfs_inode_cachep;
static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
{
+ struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(sb);
struct hugetlbfs_inode_info *p;
+ if (unlikely(!hugetlbfs_inc_free_inodes(sbinfo)))
+ return NULL;
p = kmem_cache_alloc(hugetlbfs_inode_cachep, SLAB_KERNEL);
- if (!p)
+ if (unlikely(!p)) {
+ hugetlbfs_dec_free_inodes(sbinfo);
return NULL;
+ }
return &p->vfs_inode;
}
-static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
-{
- struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
-
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR)
- inode_init_once(&ei->vfs_inode);
-}
-
static void hugetlbfs_destroy_inode(struct inode *inode)
{
+ hugetlbfs_dec_free_inodes(HUGETLBFS_SB(inode->i_sb));
mpol_free_shared_policy(&HUGETLBFS_I(inode)->policy);
kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
}
@@ -565,6 +561,16 @@
.set_page_dirty = hugetlbfs_set_page_dirty,
};
+
+static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
+{
+ struct hugetlbfs_inode_info *ei = (struct hugetlbfs_inode_info *)foo;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR)
+ inode_init_once(&ei->vfs_inode);
+}
+
struct file_operations hugetlbfs_file_operations = {
.mmap = hugetlbfs_file_mmap,
.fsync = simple_sync_file,
--
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next reply other threads:[~2005-09-21 9:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-21 9:21 Christoph Hellwig [this message]
2005-09-21 9:21 ` [PATCH 1/4] hugetlbfs: move free_inodes accounting Christoph Hellwig
2005-09-21 19:10 ` Andrew Morton
2005-09-21 19:10 ` Andrew Morton
2005-09-21 19:34 ` Dave Hansen
2005-09-21 19:34 ` Dave Hansen
-- strict thread matches above, loose matches on Subject: below --
2005-09-22 6:37 Chen, Kenneth W
2005-09-22 6:37 ` Chen, Kenneth W
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