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Date: Thu, 10 Nov 2011 18:34:49 +0800
From: Zheng Liu <gnehzuil.liu@...il.com>
To: linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc: Zheng Liu <wenqing.lz@...bao.com>,
Wang Shaoyan <wangshaoyan.pt@...bao.com>
Subject: [PATCH v2 3/8] ext4: Count metadata request of read operations in buffered io
From: Zheng Liu <wenqing.lz@...bao.com>
Add ext4_ios_read*() functions to count the metadata type of read in buffered
io. We cannot count it in breadahead() due to no buffer_head is passed or
returned in this function.
Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
Signed-off-by: Wang Shaoyan <wangshaoyan.pt@...bao.com>
---
fs/ext4/balloc.c | 1 +
fs/ext4/extents.c | 3 +++
fs/ext4/ialloc.c | 1 +
fs/ext4/indirect.c | 3 +++
fs/ext4/inode.c | 3 +++
fs/ext4/mballoc.c | 1 +
fs/ext4/move_extent.c | 4 ++++
fs/ext4/namei.c | 5 ++++-
fs/ext4/super.c | 3 +++
fs/ext4/xattr.c | 6 ++++++
10 files changed, 29 insertions(+), 1 deletions(-)
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index f6dba45..3503c33 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -394,6 +394,7 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
block_group, bitmap_blk);
return NULL;
}
+ ext4_ios_read_one(bh, EXT4_IOS_BLOCK_BITMAP);
ext4_valid_block_bitmap(sb, desc, block_group, bh);
/*
* file system mounted not to panic on error,
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 61fa9e1..289994f 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -672,6 +672,7 @@ ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
put_bh(bh);
goto err;
}
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENT_BLOCK);
/* validate the extent entries */
need_to_validate = 1;
}
@@ -1326,6 +1327,7 @@ got_index:
bh = sb_bread(inode->i_sb, block);
if (bh == NULL)
return -EIO;
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENT_BLOCK);
eh = ext_block_hdr(bh);
/* subtract from p_depth to get proper eh_depth */
if (ext4_ext_check(inode, eh, path->p_depth - depth)) {
@@ -2568,6 +2570,7 @@ again:
err = -EIO;
break;
}
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENT_BLOCK);
if (WARN_ON(i + 1 > depth)) {
err = -EIO;
break;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 00beb4f..a86daff 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -161,6 +161,7 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
block_group, bitmap_blk);
return NULL;
}
+ ext4_ios_read_one(bh, EXT4_IOS_INODE_BITMAP);
return bh;
}
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 3cfc73f..7ba97e3 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -162,6 +162,7 @@ static Indirect *ext4_get_branch(struct inode *inode, int depth,
put_bh(bh);
goto failure;
}
+ ext4_ios_read_one(bh, EXT4_IOS_INDIRECT_BLOCK);
/* validate block references */
if (ext4_check_indirect_blockref(inode, bh)) {
put_bh(bh);
@@ -1266,6 +1267,8 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
continue;
}
+ ext4_ios_read_one(bh, EXT4_IOS_INDIRECT_BLOCK);
+
/* This zaps the entire block. Bottom up. */
BUFFER_TRACE(bh, "free child branches");
ext4_free_branches(handle, inode, bh,
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index cc5a6da..d4f9da3 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -701,6 +701,7 @@ struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode,
return bh;
ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &bh);
wait_on_buffer(bh);
+ ext4_ios_read_one(bh, EXT4_IOS_DIR_ENTRY);
if (buffer_uptodate(bh))
return bh;
put_bh(bh);
@@ -3426,6 +3427,7 @@ int ext4_block_zero_page_range(handle_t *handle,
err = -EIO;
ll_rw_block(READ, 1, &bh);
wait_on_buffer(bh);
+ ext4_ios_read_one(bh, EXT4_IOS_INODE_TABLE);
/* Uhhuh. Read error. Complain and punt. */
if (!buffer_uptodate(bh))
goto unlock;
@@ -3683,6 +3685,7 @@ make_io:
brelse(bh);
return -EIO;
}
+ ext4_ios_read_one(bh, EXT4_IOS_INODE_TABLE);
}
has_buffer:
iloc->bh = bh;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e2d8be8..e5ca591 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -883,6 +883,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore)
set_bitmap_uptodate(bh[i]);
bh[i]->b_end_io = end_buffer_read_sync;
submit_bh(READ, bh[i]);
+ ext4_ios_read_one(bh[i], EXT4_IOS_BLOCK_BITMAP);
mb_debug(1, "read bitmap for group %u\n", first_group + i);
}
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index c5826c6..200ae0f 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -102,6 +102,8 @@ mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
sb_bread(inode->i_sb, path[ppos].p_block);
if (!path[ppos+1].p_bh)
return -EIO;
+ ext4_ios_read_one(path[ppos+1].p_bh,
+ EXT4_IOS_EXTENT_BLOCK);
path[ppos+1].p_hdr =
ext_block_hdr(path[ppos+1].p_bh);
@@ -117,6 +119,8 @@ mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
path[cur_ppos].p_block);
if (!path[cur_ppos+1].p_bh)
return -EIO;
+ ext4_ios_read_one(path[cur_ppos+1].p_bh,
+ EXT4_IOS_EXTENT_BLOCK);
path[cur_ppos+1].p_hdr =
ext_block_hdr(path[cur_ppos+1].p_bh);
}
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index aa4c782..2bd167f 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -921,9 +921,12 @@ restart:
num++;
bh = ext4_getblk(NULL, dir, b++, 0, &err);
bh_use[ra_max] = bh;
- if (bh)
+ if (bh) {
ll_rw_block(READ | REQ_META | REQ_PRIO,
1, &bh);
+ ext4_ios_read_one(bh,
+ EXT4_IOS_DIR_ENTRY);
+ }
}
}
if ((bh = bh_use[ra_ptr++]) == NULL)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3bec50c..08aa193 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3171,6 +3171,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
ext4_msg(sb, KERN_ERR, "unable to read superblock");
goto out_fail;
}
+ ext4_ios_read_one(bh, EXT4_IOS_SUPER_BLOCK);
/*
* Note: s_es must be initialized as soon as possible because
* some ext4 macro-instructions depend on its value
@@ -3345,6 +3346,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
"Can't read superblock on 2nd try");
goto failed_mount;
}
+ ext4_ios_read_one(bh, EXT4_IOS_SUPER_BLOCK);
es = (struct ext4_super_block *)(((char *)bh->b_data) + offset);
sbi->s_es = es;
if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) {
@@ -3555,6 +3557,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
db_count = i;
goto failed_mount2;
}
+ ext4_ios_read_one(sbi->s_group_desc[i], EXT4_IOS_GROUP_DESC);
}
if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 93a00d8..9869805 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -224,6 +224,7 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
if (!bh)
goto cleanup;
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENDED_ATTR);
ea_bdebug(bh, "b_count=%d, refcount=%d",
atomic_read(&(bh->b_count)), le32_to_cpu(BHDR(bh)->h_refcount));
if (ext4_xattr_check_block(bh)) {
@@ -368,6 +369,7 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size)
error = -EIO;
if (!bh)
goto cleanup;
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENDED_ATTR);
ea_bdebug(bh, "b_count=%d, refcount=%d",
atomic_read(&(bh->b_count)), le32_to_cpu(BHDR(bh)->h_refcount));
if (ext4_xattr_check_block(bh)) {
@@ -659,6 +661,7 @@ ext4_xattr_block_find(struct inode *inode, struct ext4_xattr_info *i,
error = -EIO;
if (!bs->bh)
goto cleanup;
+ ext4_ios_read_one(bs->bh, EXT4_IOS_EXTENDED_ATTR);
ea_bdebug(bs->bh, "b_count=%d, refcount=%d",
atomic_read(&(bs->bh->b_count)),
le32_to_cpu(BHDR(bs->bh)->h_refcount));
@@ -1192,6 +1195,7 @@ retry:
error = -EIO;
if (!bh)
goto cleanup;
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENDED_ATTR);
if (ext4_xattr_check_block(bh)) {
EXT4_ERROR_INODE(inode, "bad block %llu",
EXT4_I(inode)->i_file_acl);
@@ -1375,6 +1379,7 @@ ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
EXT4_I(inode)->i_file_acl);
goto cleanup;
}
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENDED_ATTR);
if (BHDR(bh)->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC) ||
BHDR(bh)->h_blocks != cpu_to_le32(1)) {
EXT4_ERROR_INODE(inode, "bad block %llu",
@@ -1515,6 +1520,7 @@ again:
*pce = ce;
return bh;
}
+ ext4_ios_read_one(bh, EXT4_IOS_EXTENDED_ATTR);
brelse(bh);
ce = mb_cache_entry_find_next(ce, inode->i_sb->s_bdev, hash);
}
--
1.7.4.1
--
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