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-rw-r--r--fs/xfs/linux-2.6/xfs_super.c30
-rw-r--r--fs/xfs/linux-2.6/xfs_sync.c88
-rw-r--r--fs/xfs/linux-2.6/xfs_sync.h2
-rw-r--r--fs/xfs/xfs_mount.h4
4 files changed, 63 insertions, 61 deletions
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 1ba5c451da3..c71b6ed45e4 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1191,22 +1191,12 @@ xfs_fs_sync_fs(
return -error;
if (laptop_mode) {
- int prev_sync_seq = mp->m_sync_seq;
-
/*
* The disk must be active because we're syncing.
* We schedule xfssyncd now (now that the disk is
* active) instead of later (when it might not be).
*/
- wake_up_process(mp->m_sync_task);
- /*
- * We have to wait for the sync iteration to complete.
- * If we don't, the disk activity caused by the sync
- * will come after the sync is completed, and that
- * triggers another sync from laptop mode.
- */
- wait_event(mp->m_wait_single_sync_task,
- mp->m_sync_seq != prev_sync_seq);
+ flush_delayed_work_sync(&mp->m_sync_work);
}
return 0;
@@ -1492,7 +1482,6 @@ xfs_fs_fill_super(
atomic_set(&mp->m_active_trans, 0);
INIT_LIST_HEAD(&mp->m_sync_list);
spin_lock_init(&mp->m_sync_lock);
- init_waitqueue_head(&mp->m_wait_single_sync_task);
mp->m_super = sb;
sb->s_fs_info = mp;
@@ -1833,13 +1822,27 @@ init_xfs_fs(void)
if (error)
goto out_cleanup_procfs;
+ /*
+ * max_active is set to 8 to give enough concurency to allow
+ * multiple work operations on each CPU to run. This allows multiple
+ * filesystems to be running sync work concurrently, and scales with
+ * the number of CPUs in the system.
+ */
+ xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE, 8);
+ if (!xfs_syncd_wq) {
+ error = -ENOMEM;
+ goto out_sysctl_unregister;
+ }
+
vfs_initquota();
error = register_filesystem(&xfs_fs_type);
if (error)
- goto out_sysctl_unregister;
+ goto out_destroy_xfs_syncd;
return 0;
+ out_destroy_xfs_syncd:
+ destroy_workqueue(xfs_syncd_wq);
out_sysctl_unregister:
xfs_sysctl_unregister();
out_cleanup_procfs:
@@ -1861,6 +1864,7 @@ exit_xfs_fs(void)
{
vfs_exitquota();
unregister_filesystem(&xfs_fs_type);
+ destroy_workqueue(xfs_syncd_wq);
xfs_sysctl_unregister();
xfs_cleanup_procfs();
xfs_buf_terminate();
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index 594cd822d84..4a582d8100e 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -39,6 +39,8 @@
#include <linux/kthread.h>
#include <linux/freezer.h>
+struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */
+
/*
* The inode lookup is done in batches to keep the amount of lock traffic and
* radix tree lookups to a minimum. The batch size is a trade off between
@@ -489,32 +491,6 @@ xfs_flush_inodes(
xfs_log_force(ip->i_mount, XFS_LOG_SYNC);
}
-/*
- * Every sync period we need to unpin all items, reclaim inodes and sync
- * disk quotas. We might need to cover the log to indicate that the
- * filesystem is idle and not frozen.
- */
-STATIC void
-xfs_sync_worker(
- struct xfs_mount *mp,
- void *unused)
-{
- int error;
-
- if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
- /* dgc: errors ignored here */
- if (mp->m_super->s_frozen == SB_UNFROZEN &&
- xfs_log_need_covered(mp))
- error = xfs_fs_log_dummy(mp);
- else
- xfs_log_force(mp, 0);
- xfs_reclaim_inodes(mp, 0);
- error = xfs_qm_sync(mp, SYNC_TRYLOCK);
- }
- mp->m_sync_seq++;
- wake_up(&mp->m_wait_single_sync_task);
-}
-
STATIC int
xfssyncd(
void *arg)
@@ -528,34 +504,19 @@ xfssyncd(
timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10);
for (;;) {
if (list_empty(&mp->m_sync_list))
- timeleft = schedule_timeout_interruptible(timeleft);
+ schedule_timeout_interruptible(timeleft);
/* swsusp */
try_to_freeze();
if (kthread_should_stop() && list_empty(&mp->m_sync_list))
break;
spin_lock(&mp->m_sync_lock);
- /*
- * We can get woken by laptop mode, to do a sync -
- * that's the (only!) case where the list would be
- * empty with time remaining.
- */
- if (!timeleft || list_empty(&mp->m_sync_list)) {
- if (!timeleft)
- timeleft = xfs_syncd_centisecs *
- msecs_to_jiffies(10);
- INIT_LIST_HEAD(&mp->m_sync_work.w_list);
- list_add_tail(&mp->m_sync_work.w_list,
- &mp->m_sync_list);
- }
list_splice_init(&mp->m_sync_list, &tmp);
spin_unlock(&mp->m_sync_lock);
list_for_each_entry_safe(work, n, &tmp, w_list) {
(*work->w_syncer)(mp, work->w_data);
list_del(&work->w_list);
- if (work == &mp->m_sync_work)
- continue;
if (work->w_completion)
complete(work->w_completion);
kmem_free(work);
@@ -565,13 +526,49 @@ xfssyncd(
return 0;
}
+static void
+xfs_syncd_queue_sync(
+ struct xfs_mount *mp)
+{
+ queue_delayed_work(xfs_syncd_wq, &mp->m_sync_work,
+ msecs_to_jiffies(xfs_syncd_centisecs * 10));
+}
+
+/*
+ * Every sync period we need to unpin all items, reclaim inodes and sync
+ * disk quotas. We might need to cover the log to indicate that the
+ * filesystem is idle and not frozen.
+ */
+STATIC void
+xfs_sync_worker(
+ struct work_struct *work)
+{
+ struct xfs_mount *mp = container_of(to_delayed_work(work),
+ struct xfs_mount, m_sync_work);
+ int error;
+
+ if (!(mp->m_flags & XFS_MOUNT_RDONLY)) {
+ /* dgc: errors ignored here */
+ if (mp->m_super->s_frozen == SB_UNFROZEN &&
+ xfs_log_need_covered(mp))
+ error = xfs_fs_log_dummy(mp);
+ else
+ xfs_log_force(mp, 0);
+ xfs_reclaim_inodes(mp, 0);
+ error = xfs_qm_sync(mp, SYNC_TRYLOCK);
+ }
+
+ /* queue us up again */
+ xfs_syncd_queue_sync(mp);
+}
+
int
xfs_syncd_init(
struct xfs_mount *mp)
{
- mp->m_sync_work.w_syncer = xfs_sync_worker;
- mp->m_sync_work.w_mount = mp;
- mp->m_sync_work.w_completion = NULL;
+ INIT_DELAYED_WORK(&mp->m_sync_work, xfs_sync_worker);
+ xfs_syncd_queue_sync(mp);
+
mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd/%s", mp->m_fsname);
if (IS_ERR(mp->m_sync_task))
return -PTR_ERR(mp->m_sync_task);
@@ -582,6 +579,7 @@ void
xfs_syncd_stop(
struct xfs_mount *mp)
{
+ cancel_delayed_work_sync(&mp->m_sync_work);
kthread_stop(mp->m_sync_task);
}
diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h
index 32ba6628290..e3a6ad27415 100644
--- a/fs/xfs/linux-2.6/xfs_sync.h
+++ b/fs/xfs/linux-2.6/xfs_sync.h
@@ -32,6 +32,8 @@ typedef struct xfs_sync_work {
#define SYNC_WAIT 0x0001 /* wait for i/o to complete */
#define SYNC_TRYLOCK 0x0002 /* only try to lock inodes */
+extern struct workqueue_struct *xfs_syncd_wq; /* sync workqueue */
+
int xfs_syncd_init(struct xfs_mount *mp);
void xfs_syncd_stop(struct xfs_mount *mp);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index a62e8971539..2c11e62be88 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -203,12 +203,10 @@ typedef struct xfs_mount {
struct mutex m_icsb_mutex; /* balancer sync lock */
#endif
struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
+ struct delayed_work m_sync_work; /* background sync work */
struct task_struct *m_sync_task; /* generalised sync thread */
- xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */
struct list_head m_sync_list; /* sync thread work item list */
spinlock_t m_sync_lock; /* work item list lock */
- int m_sync_seq; /* sync thread generation no. */
- wait_queue_head_t m_wait_single_sync_task;
__int64_t m_update_flags; /* sb flags we need to update
on the next remount,rw */
struct shrinker m_inode_shrink; /* inode reclaim shrinker */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-20 02:35:34 +0000