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[GFS2] Shrink gfs2_inode (8) - i_vn 

This shrinks the size of the gfs2_inode by 8 bytes by
replacing the version counter with a one bit valid/invalid
flag.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
hifive-unleashed-5.1
Steven Whitehouse 2006-11-01 16:05:38 -05:00
parent a9583c7983
commit bfded27ba0
4 changed files with 7 additions and 6 deletions
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5
fs/gfs2/glops.c
View File

@ -305,8 +305,9 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
int data = (flags & DIO_DATA);
if (meta) {
struct gfs2_inode *ip = gl->gl_object;
gfs2_meta_inval(gl);
gl->gl_vn++;
set_bit(GIF_INVALID, &ip->i_flags);
}
if (data)
gfs2_page_inval(gl);
@ -351,7 +352,7 @@ static int inode_go_lock(struct gfs2_holder *gh)
if (!ip)
return 0;
if (ip->i_vn != gl->gl_vn) {
if (test_bit(GIF_INVALID, &ip->i_flags)) {
error = gfs2_inode_refresh(ip);
if (error)
return error;

2
fs/gfs2/incore.h
View File

@ -217,6 +217,7 @@ struct gfs2_alloc {
};
enum {
GIF_INVALID = 0,
GIF_QD_LOCKED = 1,
GIF_PAGED = 2,
GIF_SW_PAGED = 3,
@ -228,7 +229,6 @@ struct gfs2_inode {
unsigned long i_flags; /* GIF_... */
u64 i_vn;
struct gfs2_dinode_host i_di; /* To be replaced by ref to block */
struct gfs2_glock *i_gl; /* Move into i_gh? */

4
fs/gfs2/inode.c
View File

@ -145,7 +145,7 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *i
if (unlikely(error))
goto fail_put;
ip->i_vn = ip->i_gl->gl_vn - 1;
set_bit(GIF_INVALID, &ip->i_flags);
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (unlikely(error))
goto fail_iopen;
@ -242,7 +242,7 @@ int gfs2_inode_refresh(struct gfs2_inode *ip)
error = gfs2_dinode_in(ip, dibh->b_data);
brelse(dibh);
ip->i_vn = ip->i_gl->gl_vn;
clear_bit(GIF_INVALID, &ip->i_flags);
return error;
}

2
fs/gfs2/ops_inode.c
View File

@ -844,7 +844,7 @@ static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
struct gfs2_holder i_gh;
int error;
if (ip->i_vn == ip->i_gl->gl_vn)
if (!test_bit(GIF_INVALID, &ip->i_flags))
return generic_permission(inode, mask, gfs2_check_acl);
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);