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[XFS] rename various pagebuf symbols to xfsbuf
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SGI-PV: 908809
SGI-Modid: xfs-linux:xfs-kern:192348a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
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Christoph Hellwig authored and Nathan Scott committed Jun 21, 2005
1 parent 9ba91bd commit 23ea403
Showing 1 changed file with 77 additions and 66 deletions.
143 changes: 77 additions & 66 deletions fs/xfs/linux-2.6/xfs_buf.c
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Original file line number Diff line number Diff line change
Expand Up @@ -61,12 +61,13 @@
* File wide globals
*/

STATIC kmem_cache_t *pagebuf_cache;
STATIC kmem_cache_t *pagebuf_zone;
STATIC kmem_shaker_t pagebuf_shake;
STATIC int pagebuf_daemon_wakeup(int, unsigned int);
STATIC int xfsbufd_wakeup(int, unsigned int);
STATIC void pagebuf_delwri_queue(xfs_buf_t *, int);
STATIC struct workqueue_struct *pagebuf_logio_workqueue;
STATIC struct workqueue_struct *pagebuf_dataio_workqueue;

STATIC struct workqueue_struct *xfslogd_workqueue;
STATIC struct workqueue_struct *xfsdatad_workqueue;

/*
* Pagebuf debugging
Expand Down Expand Up @@ -123,9 +124,9 @@ ktrace_t *pagebuf_trace_buf;


#define pagebuf_allocate(flags) \
kmem_zone_alloc(pagebuf_cache, pb_to_km(flags))
kmem_zone_alloc(pagebuf_zone, pb_to_km(flags))
#define pagebuf_deallocate(pb) \
kmem_zone_free(pagebuf_cache, (pb));
kmem_zone_free(pagebuf_zone, (pb));

/*
* Page Region interfaces.
Expand Down Expand Up @@ -425,7 +426,7 @@ _pagebuf_lookup_pages(
__FUNCTION__, gfp_mask);

XFS_STATS_INC(pb_page_retries);
pagebuf_daemon_wakeup(0, gfp_mask);
xfsbufd_wakeup(0, gfp_mask);
blk_congestion_wait(WRITE, HZ/50);
goto retry;
}
Expand Down Expand Up @@ -1136,8 +1137,8 @@ pagebuf_iodone(
if ((pb->pb_iodone) || (pb->pb_flags & PBF_ASYNC)) {
if (schedule) {
INIT_WORK(&pb->pb_iodone_work, pagebuf_iodone_work, pb);
queue_work(dataio ? pagebuf_dataio_workqueue :
pagebuf_logio_workqueue, &pb->pb_iodone_work);
queue_work(dataio ? xfsdatad_workqueue :
xfslogd_workqueue, &pb->pb_iodone_work);
} else {
pagebuf_iodone_work(pb);
}
Expand Down Expand Up @@ -1742,27 +1743,27 @@ pagebuf_runall_queues(
}

/* Defines for pagebuf daemon */
STATIC DECLARE_COMPLETION(pagebuf_daemon_done);
STATIC struct task_struct *pagebuf_daemon_task;
STATIC int pagebuf_daemon_active;
STATIC int force_flush;
STATIC int force_sleep;
STATIC DECLARE_COMPLETION(xfsbufd_done);
STATIC struct task_struct *xfsbufd_task;
STATIC int xfsbufd_active;
STATIC int xfsbufd_force_flush;
STATIC int xfsbufd_force_sleep;

STATIC int
pagebuf_daemon_wakeup(
xfsbufd_wakeup(
int priority,
unsigned int mask)
{
if (force_sleep)
if (xfsbufd_force_sleep)
return 0;
force_flush = 1;
xfsbufd_force_flush = 1;
barrier();
wake_up_process(pagebuf_daemon_task);
wake_up_process(xfsbufd_task);
return 0;
}

STATIC int
pagebuf_daemon(
xfsbufd(
void *data)
{
struct list_head tmp;
Expand All @@ -1774,17 +1775,17 @@ pagebuf_daemon(
daemonize("xfsbufd");
current->flags |= PF_MEMALLOC;

pagebuf_daemon_task = current;
pagebuf_daemon_active = 1;
xfsbufd_task = current;
xfsbufd_active = 1;
barrier();

INIT_LIST_HEAD(&tmp);
do {
if (unlikely(current->flags & PF_FREEZE)) {
force_sleep = 1;
xfsbufd_force_sleep = 1;
refrigerator(PF_FREEZE);
} else {
force_sleep = 0;
xfsbufd_force_sleep = 0;
}

set_current_state(TASK_INTERRUPTIBLE);
Expand All @@ -1797,7 +1798,7 @@ pagebuf_daemon(
ASSERT(pb->pb_flags & PBF_DELWRI);

if (!pagebuf_ispin(pb) && !pagebuf_cond_lock(pb)) {
if (!force_flush &&
if (!xfsbufd_force_flush &&
time_before(jiffies,
pb->pb_queuetime + age)) {
pagebuf_unlock(pb);
Expand All @@ -1824,10 +1825,10 @@ pagebuf_daemon(
if (as_list_len > 0)
purge_addresses();

force_flush = 0;
} while (pagebuf_daemon_active);
xfsbufd_force_flush = 0;
} while (xfsbufd_active);

complete_and_exit(&pagebuf_daemon_done, 0);
complete_and_exit(&xfsbufd_done, 0);
}

/*
Expand All @@ -1844,8 +1845,8 @@ xfs_flush_buftarg(
xfs_buf_t *pb, *n;
int pincount = 0;

pagebuf_runall_queues(pagebuf_dataio_workqueue);
pagebuf_runall_queues(pagebuf_logio_workqueue);
pagebuf_runall_queues(xfsdatad_workqueue);
pagebuf_runall_queues(xfslogd_workqueue);

INIT_LIST_HEAD(&tmp);
spin_lock(&pbd_delwrite_lock);
Expand Down Expand Up @@ -1898,43 +1899,43 @@ xfs_flush_buftarg(
}

STATIC int
pagebuf_daemon_start(void)
xfs_buf_daemons_start(void)
{
int rval;
int error = -ENOMEM;

pagebuf_logio_workqueue = create_workqueue("xfslogd");
if (!pagebuf_logio_workqueue)
return -ENOMEM;
xfslogd_workqueue = create_workqueue("xfslogd");
if (!xfslogd_workqueue)
goto out;

pagebuf_dataio_workqueue = create_workqueue("xfsdatad");
if (!pagebuf_dataio_workqueue) {
destroy_workqueue(pagebuf_logio_workqueue);
return -ENOMEM;
}
xfsdatad_workqueue = create_workqueue("xfsdatad");
if (!xfsdatad_workqueue)
goto out_destroy_xfslogd_workqueue;

rval = kernel_thread(pagebuf_daemon, NULL, CLONE_FS|CLONE_FILES);
if (rval < 0) {
destroy_workqueue(pagebuf_logio_workqueue);
destroy_workqueue(pagebuf_dataio_workqueue);
}
error = kernel_thread(xfsbufd, NULL, CLONE_FS|CLONE_FILES);
if (error < 0)
goto out_destroy_xfsdatad_workqueue;
return 0;

return rval;
out_destroy_xfsdatad_workqueue:
destroy_workqueue(xfsdatad_workqueue);
out_destroy_xfslogd_workqueue:
destroy_workqueue(xfslogd_workqueue);
out:
return error;
}

/*
* pagebuf_daemon_stop
*
* Note: do not mark as __exit, it is called from pagebuf_terminate.
*/
STATIC void
pagebuf_daemon_stop(void)
xfs_buf_daemons_stop(void)
{
pagebuf_daemon_active = 0;
xfsbufd_active = 0;
barrier();
wait_for_completion(&pagebuf_daemon_done);
wait_for_completion(&xfsbufd_done);

destroy_workqueue(pagebuf_logio_workqueue);
destroy_workqueue(pagebuf_dataio_workqueue);
destroy_workqueue(xfslogd_workqueue);
destroy_workqueue(xfsdatad_workqueue);
}

/*
Expand All @@ -1944,27 +1945,37 @@ pagebuf_daemon_stop(void)
int __init
pagebuf_init(void)
{
pagebuf_cache = kmem_cache_create("xfs_buf_t", sizeof(xfs_buf_t), 0,
SLAB_HWCACHE_ALIGN, NULL, NULL);
if (pagebuf_cache == NULL) {
printk("XFS: couldn't init xfs_buf_t cache\n");
pagebuf_terminate();
return -ENOMEM;
}
int error = -ENOMEM;

pagebuf_zone = kmem_zone_init(sizeof(xfs_buf_t), "xfs_buf");
if (!pagebuf_zone)
goto out;

#ifdef PAGEBUF_TRACE
pagebuf_trace_buf = ktrace_alloc(PAGEBUF_TRACE_SIZE, KM_SLEEP);
#endif

pagebuf_daemon_start();
error = xfs_buf_daemons_start();
if (!error)
goto out_free_buf_zone;

pagebuf_shake = kmem_shake_register(pagebuf_daemon_wakeup);
if (pagebuf_shake == NULL) {
pagebuf_terminate();
return -ENOMEM;
pagebuf_shake = kmem_shake_register(xfsbufd_wakeup);
if (!pagebuf_shake) {
error = -ENOMEM;
goto out_stop_daemons;
}

return 0;

out_stop_daemons:
xfs_buf_daemons_stop();
out_free_buf_zone:
#ifdef PAGEBUF_TRACE
ktrace_free(pagebuf_trace_buf);
#endif
kmem_zone_destroy(pagebuf_zone);
out:
return error;
}


Expand All @@ -1976,12 +1987,12 @@ pagebuf_init(void)
void
pagebuf_terminate(void)
{
pagebuf_daemon_stop();
xfs_buf_daemons_stop();

#ifdef PAGEBUF_TRACE
ktrace_free(pagebuf_trace_buf);
#endif

kmem_zone_destroy(pagebuf_cache);
kmem_zone_destroy(pagebuf_zone);
kmem_shake_deregister(pagebuf_shake);
}

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