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Subject[-mm PATCH 2/32] fs: fix-up schedule_timeout() usage
Description: Use schedule_timeout_{,un}interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size. Also use
helper functions to convert between human time units and jiffies rather
than constant HZ division to avoid rounding errors.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>

---

fs/cifs/cifsfs.c | 7 ++-----
fs/cifs/connect.c | 6 ++----
fs/jbd/transaction.c | 3 +--
fs/lockd/clntproc.c | 3 +--
fs/nfs/nfs3proc.c | 3 +--
fs/nfs/nfs4proc.c | 12 ++++--------
fs/reiserfs/journal.c | 3 +--
fs/smbfs/proc.c | 3 +--
fs/xfs/linux-2.6/time.h | 3 +--
fs/xfs/linux-2.6/xfs_buf.c | 6 +++---
fs/xfs/linux-2.6/xfs_super.c | 12 ++++++------
11 files changed, 23 insertions(+), 38 deletions(-)

diff -urpN 2.6.13-rc5-mm1/fs/cifs/cifsfs.c 2.6.13-rc5-mm1-dev/fs/cifs/cifsfs.c
--- 2.6.13-rc5-mm1/fs/cifs/cifsfs.c 2005-08-07 09:57:37.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/cifs/cifsfs.c 2005-08-10 15:03:11.000000000 -0700
@@ -781,14 +781,11 @@ static int cifs_oplock_thread(void * dum

oplockThread = current;
do {
- set_current_state(TASK_INTERRUPTIBLE);
-
- schedule_timeout(1*HZ);
+ schedule_timeout_interruptible(1*HZ);
spin_lock(&GlobalMid_Lock);
if(list_empty(&GlobalOplock_Q)) {
spin_unlock(&GlobalMid_Lock);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(39*HZ);
+ schedule_timeout_interruptible(39*HZ);
} else {
oplock_item = list_entry(GlobalOplock_Q.next,
struct oplock_q_entry, qhead);
diff -urpN 2.6.13-rc5-mm1/fs/cifs/connect.c 2.6.13-rc5-mm1-dev/fs/cifs/connect.c
--- 2.6.13-rc5-mm1/fs/cifs/connect.c 2005-08-07 10:05:22.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/cifs/connect.c 2005-08-12 13:42:49.000000000 -0700
@@ -3215,10 +3215,8 @@ cifs_umount(struct super_block *sb, stru
}

cifs_sb->tcon = NULL;
- if (ses) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ / 2);
- }
+ if (ses)
+ schedule_timeout_interruptible(msecs_to_jiffies(500));
if (ses)
sesInfoFree(ses);

diff -urpN 2.6.13-rc5-mm1/fs/jbd/transaction.c 2.6.13-rc5-mm1-dev/fs/jbd/transaction.c
--- 2.6.13-rc5-mm1/fs/jbd/transaction.c 2005-08-07 10:05:22.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/jbd/transaction.c 2005-08-10 15:03:33.000000000 -0700
@@ -1340,8 +1340,7 @@ int journal_stop(handle_t *handle)
if (handle->h_sync) {
do {
old_handle_count = transaction->t_handle_count;
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
+ schedule_timeout_uninterruptible(1);
} while (old_handle_count != transaction->t_handle_count);
}

diff -urpN 2.6.13-rc5-mm1/fs/lockd/clntproc.c 2.6.13-rc5-mm1-dev/fs/lockd/clntproc.c
--- 2.6.13-rc5-mm1/fs/lockd/clntproc.c 2005-08-07 09:58:15.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/lockd/clntproc.c 2005-08-10 15:03:41.000000000 -0700
@@ -299,8 +299,7 @@ nlmclnt_alloc_call(void)
return call;
}
printk("nlmclnt_alloc_call: failed, waiting for memory\n");
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(5*HZ);
+ schedule_timeout_interruptible(5*HZ);
}
return NULL;
}
diff -urpN 2.6.13-rc5-mm1/fs/nfs/nfs3proc.c 2.6.13-rc5-mm1-dev/fs/nfs/nfs3proc.c
--- 2.6.13-rc5-mm1/fs/nfs/nfs3proc.c 2005-08-07 09:58:15.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/nfs/nfs3proc.c 2005-08-10 15:12:50.000000000 -0700
@@ -34,8 +34,7 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt,
res = rpc_call_sync(clnt, msg, flags);
if (res != -EJUKEBOX)
break;
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(NFS_JUKEBOX_RETRY_TIME);
+ schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME);
res = -ERESTARTSYS;
} while (!signalled());
rpc_clnt_sigunmask(clnt, &oldset);
diff -urpN 2.6.13-rc5-mm1/fs/nfs/nfs4proc.c 2.6.13-rc5-mm1-dev/fs/nfs/nfs4proc.c
--- 2.6.13-rc5-mm1/fs/nfs/nfs4proc.c 2005-08-07 09:58:15.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/nfs/nfs4proc.c 2005-08-10 15:15:04.000000000 -0700
@@ -2412,14 +2412,11 @@ static int nfs4_delay(struct rpc_clnt *c
*timeout = NFS4_POLL_RETRY_MAX;
rpc_clnt_sigmask(clnt, &oldset);
if (clnt->cl_intr) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(*timeout);
+ schedule_timeout_interruptible(*timeout);
if (signalled())
res = -ERESTARTSYS;
- } else {
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(*timeout);
- }
+ } else
+ schedule_timeout_uninterruptible(*timeout);
rpc_clnt_sigunmask(clnt, &oldset);
*timeout <<= 1;
return res;
@@ -2572,8 +2569,7 @@ int nfs4_proc_delegreturn(struct inode *
static unsigned long
nfs4_set_lock_task_retry(unsigned long timeout)
{
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(timeout);
+ schedule_timeout_interruptible(timeout);
timeout <<= 1;
if (timeout > NFS4_LOCK_MAXTIMEOUT)
return NFS4_LOCK_MAXTIMEOUT;
diff -urpN 2.6.13-rc5-mm1/fs/reiserfs/journal.c 2.6.13-rc5-mm1-dev/fs/reiserfs/journal.c
--- 2.6.13-rc5-mm1/fs/reiserfs/journal.c 2005-08-07 10:05:22.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/reiserfs/journal.c 2005-08-10 15:15:11.000000000 -0700
@@ -2868,8 +2868,7 @@ static void let_transaction_grow(struct
struct reiserfs_journal *journal = SB_JOURNAL(sb);
unsigned long bcount = journal->j_bcount;
while (1) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
+ schedule_timeout_uninterruptible(1);
journal->j_current_jl->j_state |= LIST_COMMIT_PENDING;
while ((atomic_read(&journal->j_wcount) > 0 ||
atomic_read(&journal->j_jlock)) &&
diff -urpN 2.6.13-rc5-mm1/fs/smbfs/proc.c 2.6.13-rc5-mm1-dev/fs/smbfs/proc.c
--- 2.6.13-rc5-mm1/fs/smbfs/proc.c 2005-03-01 23:37:49.000000000 -0800
+++ 2.6.13-rc5-mm1-dev/fs/smbfs/proc.c 2005-08-12 13:43:10.000000000 -0700
@@ -2397,8 +2397,7 @@ smb_proc_readdir_long(struct file *filp,
if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) {
/* a damn Win95 bug - sometimes it clags if you
ask it too fast */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/5);
+ schedule_timeout_interruptible(msecs_to_jiffies(200));
continue;
}

diff -urpN 2.6.13-rc5-mm1/fs/xfs/linux-2.6/time.h 2.6.13-rc5-mm1-dev/fs/xfs/linux-2.6/time.h
--- 2.6.13-rc5-mm1/fs/xfs/linux-2.6/time.h 2005-03-01 23:38:33.000000000 -0800
+++ 2.6.13-rc5-mm1-dev/fs/xfs/linux-2.6/time.h 2005-08-10 15:15:43.000000000 -0700
@@ -39,8 +39,7 @@ typedef struct timespec timespec_t;

static inline void delay(long ticks)
{
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(ticks);
+ schedule_timeout_uninterruptible(ticks);
}

static inline void nanotime(struct timespec *tvp)
diff -urpN 2.6.13-rc5-mm1/fs/xfs/linux-2.6/xfs_buf.c 2.6.13-rc5-mm1-dev/fs/xfs/linux-2.6/xfs_buf.c
--- 2.6.13-rc5-mm1/fs/xfs/linux-2.6/xfs_buf.c 2005-08-07 09:58:15.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/xfs/linux-2.6/xfs_buf.c 2005-08-12 13:44:19.000000000 -0700
@@ -1778,10 +1778,10 @@ xfsbufd(
xfsbufd_force_sleep = 0;
}

- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout((xfs_buf_timer_centisecs * HZ) / 100);
+ schedule_timeout_interruptible
+ (xfs_buf_timer_centisecs * msecs_to_jiffies(10));

- age = (xfs_buf_age_centisecs * HZ) / 100;
+ age = xfs_buf_age_centisecs * msecs_to_jiffies(10);
spin_lock(&pbd_delwrite_lock);
list_for_each_entry_safe(pb, n, &pbd_delwrite_queue, pb_list) {
PB_TRACE(pb, "walkq1", (long)pagebuf_ispin(pb));
diff -urpN 2.6.13-rc5-mm1/fs/xfs/linux-2.6/xfs_super.c 2.6.13-rc5-mm1-dev/fs/xfs/linux-2.6/xfs_super.c
--- 2.6.13-rc5-mm1/fs/xfs/linux-2.6/xfs_super.c 2005-08-07 09:58:15.000000000 -0700
+++ 2.6.13-rc5-mm1-dev/fs/xfs/linux-2.6/xfs_super.c 2005-08-12 13:47:02.000000000 -0700
@@ -416,7 +416,7 @@ xfs_flush_inode(

igrab(inode);
xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work);
- delay(HZ/2);
+ delay(msecs_to_jiffies(500));
}

/*
@@ -441,7 +441,7 @@ xfs_flush_device(

igrab(inode);
xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work);
- delay(HZ/2);
+ delay(msecs_to_jiffies(500));
xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC);
}

@@ -478,10 +478,9 @@ xfssyncd(
wake_up(&vfsp->vfs_wait_sync_task);

INIT_LIST_HEAD(&tmp);
- timeleft = (xfs_syncd_centisecs * HZ) / 100;
+ timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- timeleft = schedule_timeout(timeleft);
+ timeleft = schedule_timeout_interruptible(timeleft);
/* swsusp */
try_to_freeze();
if (vfsp->vfs_flag & VFS_UMOUNT)
@@ -495,7 +494,8 @@ xfssyncd(
*/
if (!timeleft || list_empty(&vfsp->vfs_sync_list)) {
if (!timeleft)
- timeleft = (xfs_syncd_centisecs * HZ) / 100;
+ timeleft = xfs_syncd_centisecs *
+ msecs_to_jiffies(10);
INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list);
list_add_tail(&vfsp->vfs_sync_work.w_list,
&vfsp->vfs_sync_list);
-
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