forked from luck/tmp_suning_uos_patched
xfs: share code for grant head waiting
Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
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@ -221,12 +221,13 @@ xlog_writeq_wake(
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}
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STATIC int
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xlog_reserveq_wait(
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xlog_grant_head_wait(
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struct log *log,
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struct xlog_grant_head *head,
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struct xlog_ticket *tic,
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int need_bytes)
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{
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list_add_tail(&tic->t_queue, &log->l_reserve_head.waiters);
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list_add_tail(&tic->t_queue, &head->waiters);
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do {
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if (XLOG_FORCED_SHUTDOWN(log))
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@ -234,7 +235,7 @@ xlog_reserveq_wait(
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xlog_grant_push_ail(log, need_bytes);
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__set_current_state(TASK_UNINTERRUPTIBLE);
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spin_unlock(&log->l_reserve_head.lock);
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spin_unlock(&head->lock);
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XFS_STATS_INC(xs_sleep_logspace);
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@ -242,44 +243,10 @@ xlog_reserveq_wait(
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schedule();
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trace_xfs_log_grant_wake(log, tic);
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spin_lock(&log->l_reserve_head.lock);
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spin_lock(&head->lock);
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if (XLOG_FORCED_SHUTDOWN(log))
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goto shutdown;
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} while (xlog_space_left(log, &log->l_reserve_head.grant) < need_bytes);
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list_del_init(&tic->t_queue);
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return 0;
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shutdown:
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list_del_init(&tic->t_queue);
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return XFS_ERROR(EIO);
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}
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STATIC int
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xlog_writeq_wait(
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struct log *log,
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struct xlog_ticket *tic,
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int need_bytes)
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{
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list_add_tail(&tic->t_queue, &log->l_write_head.waiters);
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do {
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if (XLOG_FORCED_SHUTDOWN(log))
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goto shutdown;
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xlog_grant_push_ail(log, need_bytes);
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__set_current_state(TASK_UNINTERRUPTIBLE);
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spin_unlock(&log->l_write_head.lock);
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XFS_STATS_INC(xs_sleep_logspace);
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trace_xfs_log_regrant_write_sleep(log, tic);
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schedule();
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trace_xfs_log_regrant_write_wake(log, tic);
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spin_lock(&log->l_write_head.lock);
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if (XLOG_FORCED_SHUTDOWN(log))
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goto shutdown;
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} while (xlog_space_left(log, &log->l_write_head.grant) < need_bytes);
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} while (xlog_space_left(log, &head->grant) < need_bytes);
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list_del_init(&tic->t_queue);
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return 0;
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@ -2596,12 +2563,15 @@ xlog_grant_log_space(
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if (!list_empty_careful(&log->l_reserve_head.waiters)) {
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spin_lock(&log->l_reserve_head.lock);
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if (!xlog_reserveq_wake(log, &free_bytes) ||
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free_bytes < need_bytes)
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error = xlog_reserveq_wait(log, tic, need_bytes);
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free_bytes < need_bytes) {
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error = xlog_grant_head_wait(log, &log->l_reserve_head,
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tic, need_bytes);
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}
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spin_unlock(&log->l_reserve_head.lock);
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} else if (free_bytes < need_bytes) {
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spin_lock(&log->l_reserve_head.lock);
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error = xlog_reserveq_wait(log, tic, need_bytes);
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error = xlog_grant_head_wait(log, &log->l_reserve_head, tic,
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need_bytes);
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spin_unlock(&log->l_reserve_head.lock);
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}
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if (error)
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@ -2649,12 +2619,15 @@ xlog_regrant_write_log_space(
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if (!list_empty_careful(&log->l_write_head.waiters)) {
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spin_lock(&log->l_write_head.lock);
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if (!xlog_writeq_wake(log, &free_bytes) ||
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free_bytes < need_bytes)
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error = xlog_writeq_wait(log, tic, need_bytes);
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free_bytes < need_bytes) {
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error = xlog_grant_head_wait(log, &log->l_write_head,
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tic, need_bytes);
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}
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spin_unlock(&log->l_write_head.lock);
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} else if (free_bytes < need_bytes) {
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spin_lock(&log->l_write_head.lock);
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error = xlog_writeq_wait(log, tic, need_bytes);
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error = xlog_grant_head_wait(log, &log->l_write_head, tic,
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need_bytes);
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spin_unlock(&log->l_write_head.lock);
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}
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@ -837,8 +837,6 @@ DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake_up);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_enter);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_exit);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_error);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake_up);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_enter);
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DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_exit);
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