[XFS] Improve buffered read throughput by removing unnecessary timer calls

that showed in ´kernel profiles.

SGI-PV: 925163
SGI-Modid: xfs-linux:xfs-kern:23861a

Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 0 insertions, 67 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 5bf7b709f91a..a648cc8ce96b 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3688,73 +3688,6 @@ xfs_iroundup(
         return( 0 );
 }
 
-/*
- * Change the requested timestamp in the given inode.
- * We don't lock across timestamp updates, and we don't log them but
- * we do record the fact that there is dirty information in core.
- *
- * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
- *              with XFS_ICHGTIME_ACC to be sure that access time
- *              update will take.  Calling first with XFS_ICHGTIME_ACC
- *              and then XFS_ICHGTIME_MOD may fail to modify the access
- *              timestamp if the filesystem is mounted noacctm.
- */
-void
-xfs_ichgtime(xfs_inode_t *ip,
-             int flags)
-{
-        timespec_t      tv;
-        vnode_t         *vp = XFS_ITOV(ip);
-        struct inode    *inode = LINVFS_GET_IP(vp);
-
-        /*
-         * We're not supposed to change timestamps in readonly-mounted
-         * filesystems.  Throw it away if anyone asks us.
-         */
-        if (unlikely(vp->v_vfsp->vfs_flag & VFS_RDONLY))
-                return;
-
-        /*
-         * Don't update access timestamps on reads if mounted "noatime"
-         * Throw it away if anyone asks us.
-         */
-        if ((ip->i_mount->m_flags & XFS_MOUNT_NOATIME || IS_NOATIME(inode)) &&
-            ((flags & (XFS_ICHGTIME_ACC|XFS_ICHGTIME_MOD|XFS_ICHGTIME_CHG))
-                        == XFS_ICHGTIME_ACC))
-                return;
-
-        nanotime(&tv);
-        if (flags & XFS_ICHGTIME_MOD) {
-                VN_MTIMESET(vp, &tv);
-                ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
-                ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
-        }
-        if (flags & XFS_ICHGTIME_ACC) {
-                VN_ATIMESET(vp, &tv);
-                ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
-                ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
-        }
-        if (flags & XFS_ICHGTIME_CHG) {
-                VN_CTIMESET(vp, &tv);
-                ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
-                ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
-        }
-
-        /*
-         * We update the i_update_core field _after_ changing
-         * the timestamps in order to coordinate properly with
-         * xfs_iflush() so that we don't lose timestamp updates.
-         * This keeps us from having to hold the inode lock
-         * while doing this.  We use the SYNCHRONIZE macro to
-         * ensure that the compiler does not reorder the update
-         * of i_update_core above the timestamp updates above.
-         */
-        SYNCHRONIZE();
-        ip->i_update_core = 1;
-        if (!(inode->i_state & I_LOCK))
-                mark_inode_dirty_sync(inode);
-}
-
 #ifdef XFS_ILOCK_TRACE
 ktrace_t        *xfs_ilock_trace_buf;