xfs: move the log ioend workqueue to struct xlog

Move the workqueue used for log I/O completions from struct xfs_mount
to struct xlog to keep it self contained in the log code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: destroy the log workqueue after ensuring log ios are done]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 6880e2a..8a3b7cc 100644 (file)
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1489,11 +1489,19 @@ xlog_alloc_log(
        *iclogp = log->l_iclog;                 /* complete ring */
        log->l_iclog->ic_prev = prev_iclog;     /* re-write 1st prev ptr */
 
+       log->l_ioend_workqueue = alloc_workqueue("xfs-log/%s",
+                       WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_HIGHPRI, 0,
+                       mp->m_fsname);
+       if (!log->l_ioend_workqueue)
+               goto out_free_iclog;
+
        error = xlog_cil_init(log);
        if (error)
-               goto out_free_iclog;
+               goto out_destroy_workqueue;
        return log;
 
+out_destroy_workqueue:
+       destroy_workqueue(log->l_ioend_workqueue);
 out_free_iclog:
        for (iclog = log->l_iclog; iclog; iclog = prev_iclog) {
                prev_iclog = iclog->ic_next;
@@ -1690,7 +1698,7 @@ xlog_bio_end_io(
 {
        struct xlog_in_core     *iclog = bio->bi_private;
 
-       queue_work(iclog->ic_log->l_mp->m_log_workqueue,
+       queue_work(iclog->ic_log->l_ioend_workqueue,
                   &iclog->ic_end_io_work);
 }
 
@@ -1966,6 +1974,7 @@ xlog_dealloc_log(
        }
 
        log->l_mp->m_log = NULL;
+       destroy_workqueue(log->l_ioend_workqueue);
        kmem_free(log);
 }      /* xlog_dealloc_log */
 

diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index b9c90ab..a20f5e9 100644 (file)
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -357,6 +357,7 @@ struct xlog {
        struct xfs_ail          *l_ailp;        /* AIL log is working with */
        struct xfs_cil          *l_cilp;        /* CIL log is working with */
        struct xfs_buftarg      *l_targ;        /* buftarg of log */
+       struct workqueue_struct *l_ioend_workqueue; /* for I/O completions */
        struct delayed_work     l_work;         /* background flush work */
        uint                    l_flags;
        uint                    l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 448986d..4adb683 100644 (file)
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -183,7 +183,6 @@ typedef struct xfs_mount {
        struct workqueue_struct *m_unwritten_workqueue;
        struct workqueue_struct *m_cil_workqueue;
        struct workqueue_struct *m_reclaim_workqueue;
-       struct workqueue_struct *m_log_workqueue;
        struct workqueue_struct *m_eofblocks_workqueue;
        struct workqueue_struct *m_sync_workqueue;
 

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 594c119..5c28fb2 100644 (file)
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -840,16 +840,10 @@ xfs_init_mount_workqueues(
        if (!mp->m_reclaim_workqueue)
                goto out_destroy_cil;
 
-       mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
-                       WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
-                       mp->m_fsname);
-       if (!mp->m_log_workqueue)
-               goto out_destroy_reclaim;
-
        mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
                        WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
        if (!mp->m_eofblocks_workqueue)
-               goto out_destroy_log;
+               goto out_destroy_reclaim;
 
        mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
                                               mp->m_fsname);
@@ -860,8 +854,6 @@ xfs_init_mount_workqueues(
 
 out_destroy_eofb:
        destroy_workqueue(mp->m_eofblocks_workqueue);
-out_destroy_log:
-       destroy_workqueue(mp->m_log_workqueue);
 out_destroy_reclaim:
        destroy_workqueue(mp->m_reclaim_workqueue);
 out_destroy_cil:
@@ -880,7 +872,6 @@ xfs_destroy_mount_workqueues(
 {
        destroy_workqueue(mp->m_sync_workqueue);
        destroy_workqueue(mp->m_eofblocks_workqueue);
-       destroy_workqueue(mp->m_log_workqueue);
        destroy_workqueue(mp->m_reclaim_workqueue);
        destroy_workqueue(mp->m_cil_workqueue);
        destroy_workqueue(mp->m_unwritten_workqueue);