Rearrange the fields in struct inode so that on an x86_64 system,
fields that require 8-byte alignment don't end up causing 4-byte holes
in the structure. It reduces the size of struct inode from 568 bytes
to 552 bytes.
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
---
I plan to include this in the next push of ext4 to Linus,
unless there are any objections.
include/linux/fs.h | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 178cdb4..c85398d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -775,7 +775,6 @@ struct inode {
struct timespec i_atime;
struct timespec i_mtime;
struct timespec i_ctime;
- unsigned int i_blkbits;
blkcnt_t i_blocks;
#ifdef __NEED_I_SIZE_ORDERED
@@ -785,6 +784,7 @@ struct inode {
/* Misc */
unsigned long i_state;
spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */
+ unsigned int i_blkbits;
struct mutex i_mutex;
unsigned long dirtied_when; /* jiffies of first dirtying */
@@ -798,6 +798,7 @@ struct inode {
struct rcu_head i_rcu;
};
atomic_t i_count;
+ atomic_t i_writecount;
u64 i_version;
unsigned short i_bytes;
atomic_t i_dio_count;
@@ -824,7 +825,6 @@ struct inode {
#ifdef CONFIG_IMA
atomic_t i_readcount; /* struct files open RO */
#endif
- atomic_t i_writecount;
void *i_private; /* fs or device private pointer */
};
--
1.7.4.1.22.gec8e1.dirty
--
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