lkml.org 
[lkml]   [2004]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH 1/1] discard ext2 preallocation in last iput
From
Date
On Thu, 2004-10-14 at 04:41, Christoph Hellwig wrote:
> Hi Mingming,
>
> you'd been reworking ext3 reservations to be dropped in ->clear_inode
> instead of the previous bogus call in ->put_inode in
> ext3-lazy-discard-reservation-window-patch.patch in -mm.
>
> Any chance you could submit a similar change (not the full reservations
> rework) for ext2?
>
Andrew,

Here is the patch for ext2. The patch is against 2.6.9-rc4. I have done
basic testing: it passed the fsstress test from LTP on a ext2 partition.

Thanks,
Mingming

Currently the ext2 preallocation is discarded on every iput()(via ext2_put_inode()). We should only discard the preallocation on the last iput()(via ext3_clear_inode()).


---

linux-2.6.9-rc4-ming/fs/ext2/ext2.h | 1 -
linux-2.6.9-rc4-ming/fs/ext2/inode.c | 13 -------------
linux-2.6.9-rc4-ming/fs/ext2/super.c | 10 ++++------
3 files changed, 4 insertions(+), 20 deletions(-)

diff -puN fs/ext2/inode.c~ext2_discard_prealloc_fix fs/ext2/inode.c
--- linux-2.6.9-rc4/fs/ext2/inode.c~ext2_discard_prealloc_fix 2004-10-14 18:02:38.458168192 -0700
+++ linux-2.6.9-rc4-ming/fs/ext2/inode.c 2004-10-14 18:12:03.002344432 -0700
@@ -53,19 +53,6 @@ static inline int ext2_inode_is_fast_sym
}

/*
- * Called at each iput().
- *
- * The inode may be "bad" if ext2_read_inode() saw an error from
- * ext2_get_inode(), so we need to check that to avoid freeing random disk
- * blocks.
- */
-void ext2_put_inode(struct inode *inode)
-{
- if (!is_bad_inode(inode))
- ext2_discard_prealloc(inode);
-}
-
-/*
* Called at the last iput() if i_nlink is zero.
*/
void ext2_delete_inode (struct inode * inode)
diff -puN fs/ext2/super.c~ext2_discard_prealloc_fix fs/ext2/super.c
--- linux-2.6.9-rc4/fs/ext2/super.c~ext2_discard_prealloc_fix 2004-10-14 18:06:55.525088080 -0700
+++ linux-2.6.9-rc4-ming/fs/ext2/super.c 2004-10-14 19:05:47.943078920 -0700
@@ -181,10 +181,9 @@ static void destroy_inodecache(void)
printk(KERN_INFO "ext2_inode_cache: not all structures were freed\n");
}

-#ifdef CONFIG_EXT2_FS_POSIX_ACL
-
static void ext2_clear_inode(struct inode *inode)
{
+#ifdef CONFIG_EXT2_FS_POSIX_ACL
struct ext2_inode_info *ei = EXT2_I(inode);

if (ei->i_acl && ei->i_acl != EXT2_ACL_NOT_CACHED) {
@@ -195,18 +194,17 @@ static void ext2_clear_inode(struct inod
posix_acl_release(ei->i_default_acl);
ei->i_default_acl = EXT2_ACL_NOT_CACHED;
}
+#endif
+ if (!is_bad_inode(inode))
+ ext2_discard_prealloc(inode);
}

-#else
-# define ext2_clear_inode NULL
-#endif

static struct super_operations ext2_sops = {
.alloc_inode = ext2_alloc_inode,
.destroy_inode = ext2_destroy_inode,
.read_inode = ext2_read_inode,
.write_inode = ext2_write_inode,
- .put_inode = ext2_put_inode,
.delete_inode = ext2_delete_inode,
.put_super = ext2_put_super,
.write_super = ext2_write_super,
diff -puN fs/ext2/ext2.h~ext2_discard_prealloc_fix fs/ext2/ext2.h
--- linux-2.6.9-rc4/fs/ext2/ext2.h~ext2_discard_prealloc_fix 2004-10-14 18:59:22.688646496 -0700
+++ linux-2.6.9-rc4-ming/fs/ext2/ext2.h 2004-10-14 18:59:33.820954128 -0700
@@ -116,7 +116,6 @@ extern unsigned long ext2_count_free (st
/* inode.c */
extern void ext2_read_inode (struct inode *);
extern int ext2_write_inode (struct inode *, int);
-extern void ext2_put_inode (struct inode *);
extern void ext2_delete_inode (struct inode *);
extern int ext2_sync_inode (struct inode *);
extern void ext2_discard_prealloc (struct inode *);
_

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:07    [W:0.025 / U:1.216 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site