diff options
Diffstat (limited to 'fs/xfs/xfs_log.c')
| -rw-r--r-- | fs/xfs/xfs_log.c | 615 |
1 files changed, 264 insertions, 351 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index e2cc3568c299..6db1fef38bff 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -67,15 +67,10 @@ STATIC void xlog_state_switch_iclogs(xlog_t *log, int eventual_size); STATIC void xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog); -/* local functions to manipulate grant head */ -STATIC int xlog_grant_log_space(xlog_t *log, - xlog_ticket_t *xtic); STATIC void xlog_grant_push_ail(struct log *log, int need_bytes); STATIC void xlog_regrant_reserve_log_space(xlog_t *log, xlog_ticket_t *ticket); -STATIC int xlog_regrant_write_log_space(xlog_t *log, - xlog_ticket_t *ticket); STATIC void xlog_ungrant_log_space(xlog_t *log, xlog_ticket_t *ticket); @@ -150,78 +145,93 @@ xlog_grant_add_space( } while (head_val != old); } -STATIC bool -xlog_reserveq_wake( - struct log *log, - int *free_bytes) +STATIC void +xlog_grant_head_init( + struct xlog_grant_head *head) +{ + xlog_assign_grant_head(&head->grant, 1, 0); + INIT_LIST_HEAD(&head->waiters); + spin_lock_init(&head->lock); +} + +STATIC void +xlog_grant_head_wake_all( + struct xlog_grant_head *head) { struct xlog_ticket *tic; - int need_bytes; - list_for_each_entry(tic, &log->l_reserveq, t_queue) { + spin_lock(&head->lock); + list_for_each_entry(tic, &head->waiters, t_queue) + wake_up_process(tic->t_task); + spin_unlock(&head->lock); +} + +static inline int +xlog_ticket_reservation( + struct log *log, + struct xlog_grant_head *head, + struct xlog_ticket *tic) +{ + if (head == &log->l_write_head) { + ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); + return tic->t_unit_res; + } else { if (tic->t_flags & XLOG_TIC_PERM_RESERV) - need_bytes = tic->t_unit_res * tic->t_cnt; + return tic->t_unit_res * tic->t_cnt; else - need_bytes = tic->t_unit_res; - - if (*free_bytes < need_bytes) - return false; - *free_bytes -= need_bytes; - - trace_xfs_log_grant_wake_up(log, tic); - wake_up(&tic->t_wait); + return tic->t_unit_res; } - - return true; } STATIC bool -xlog_writeq_wake( +xlog_grant_head_wake( struct log *log, + struct xlog_grant_head *head, int *free_bytes) { struct xlog_ticket *tic; int need_bytes; - list_for_each_entry(tic, &log->l_writeq, t_queue) { - ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); - - need_bytes = tic->t_unit_res; - + list_for_each_entry(tic, &head->waiters, t_queue) { + need_bytes = xlog_ticket_reservation(log, head, tic); if (*free_bytes < need_bytes) return false; - *free_bytes -= need_bytes; - trace_xfs_log_regrant_write_wake_up(log, tic); - wake_up(&tic->t_wait); + *free_bytes -= need_bytes; + trace_xfs_log_grant_wake_up(log, tic); + wake_up_process(tic->t_task); } return true; } STATIC int -xlog_reserveq_wait( +xlog_grant_head_wait( struct log *log, + struct xlog_grant_head *head, struct xlog_ticket *tic, int need_bytes) { - list_add_tail(&tic->t_queue, &log->l_reserveq); + list_add_tail(&tic->t_queue, &head->waiters); do { if (XLOG_FORCED_SHUTDOWN(log)) goto shutdown; xlog_grant_push_ail(log, need_bytes); + __set_current_state(TASK_UNINTERRUPTIBLE); + spin_unlock(&head->lock); + XFS_STATS_INC(xs_sleep_logspace); - trace_xfs_log_grant_sleep(log, tic); - xlog_wait(&tic->t_wait, &log->l_grant_reserve_lock); + trace_xfs_log_grant_sleep(log, tic); + schedule(); trace_xfs_log_grant_wake(log, tic); - spin_lock(&log->l_grant_reserve_lock); + spin_lock(&head->lock); if (XLOG_FORCED_SHUTDOWN(log)) goto shutdown; - } while (xlog_space_left(log, &log->l_grant_reserve_head) < need_bytes); + } while (xlog_space_left(log, &head->grant) < need_bytes); list_del_init(&tic->t_queue); return 0; @@ -230,35 +240,58 @@ shutdown: return XFS_ERROR(EIO); } +/* + * Atomically get the log space required for a log ticket. + * + * Once a ticket gets put onto head->waiters, it will only return after the + * needed reservation is satisfied. + * + * This function is structured so that it has a lock free fast path. This is + * necessary because every new transaction reservation will come through this + * path. Hence any lock will be globally hot if we take it unconditionally on + * every pass. + * + * As tickets are only ever moved on and off head->waiters under head->lock, we + * only need to take that lock if we are going to add the ticket to the queue + * and sleep. We can avoid taking the lock if the ticket was never added to + * head->waiters because the t_queue list head will be empty and we hold the + * only reference to it so it can safely be checked unlocked. + */ STATIC int -xlog_writeq_wait( +xlog_grant_head_check( struct log *log, + struct xlog_grant_head *head, struct xlog_ticket *tic, - int need_bytes) + int *need_bytes) { - list_add_tail(&tic->t_queue, &log->l_writeq); - - do { - if (XLOG_FORCED_SHUTDOWN(log)) - goto shutdown; - xlog_grant_push_ail(log, need_bytes); - - XFS_STATS_INC(xs_sleep_logspace); - trace_xfs_log_regrant_write_sleep(log, tic); + int free_bytes; + int error = 0; - xlog_wait(&tic->t_wait, &log->l_grant_write_lock); - trace_xfs_log_regrant_write_wake(log, tic); + ASSERT(!(log->l_flags & XLOG_ACTIVE_RECOVERY)); - spin_lock(&log->l_grant_write_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto shutdown; - } while (xlog_space_left(log, &log->l_grant_write_head) < need_bytes); + /* + * If there are other waiters on the queue then give them a chance at + * logspace before us. Wake up the first waiters, if we do not wake + * up all the waiters then go to sleep waiting for more free space, + * otherwise try to get some space for this transaction. + */ + *need_bytes = xlog_ticket_reservation(log, head, tic); + free_bytes = xlog_space_left(log, &head->grant); + if (!list_empty_careful(&head->waiters)) { + spin_lock(&head->lock); + if (!xlog_grant_head_wake(log, head, &free_bytes) || + free_bytes < *need_bytes) { + error = xlog_grant_head_wait(log, head, tic, + *need_bytes); + } + spin_unlock(&head->lock); + } else if (free_bytes < *need_bytes) { + spin_lock(&head->lock); + error = xlog_grant_head_wait(log, head, tic, *need_bytes); + spin_unlock(&head->lock); + } - list_del_init(&tic->t_queue); - return 0; -shutdown: - list_del_init(&tic->t_queue); - return XFS_ERROR(EIO); + return error; } static void @@ -286,6 +319,128 @@ xlog_tic_add_region(xlog_ticket_t *tic, uint len, uint type) } /* + * Replenish the byte reservation required by moving the grant write head. + */ +int +xfs_log_regrant( + struct xfs_mount *mp, + struct xlog_ticket *tic) +{ + struct log *log = mp->m_log; + int need_bytes; + int error = 0; + + if (XLOG_FORCED_SHUTDOWN(log)) + return XFS_ERROR(EIO); + + XFS_STATS_INC(xs_try_logspace); + + /* + * This is a new transaction on the ticket, so we need to change the + * transaction ID so that the next transaction has a different TID in + * the log. Just add one to the existing tid so that we can see chains + * of rolling transactions in the log easily. + */ + tic->t_tid++; + + xlog_grant_push_ail(log, tic->t_unit_res); + + tic->t_curr_res = tic->t_unit_res; + xlog_tic_reset_res(tic); + + if (tic->t_cnt > 0) + return 0; + + trace_xfs_log_regrant(log, tic); + + error = xlog_grant_head_check(log, &log->l_write_head, tic, + &need_bytes); + if (error) + goto out_error; + + xlog_grant_add_space(log, &log->l_write_head.grant, need_bytes); + trace_xfs_log_regrant_exit(log, tic); + xlog_verify_grant_tail(log); + return 0; + +out_error: + /* + * If we are failing, make sure the ticket doesn't have any current + * reservations. We don't want to add this back when the ticket/ + * transaction gets cancelled. + */ + tic->t_curr_res = 0; + tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ + return error; +} + +/* + * Reserve log space and return a ticket corresponding the reservation. + * + * Each reservation is going to reserve extra space for a log record header. + * When writes happen to the on-disk log, we don't subtract the length of the + * log record header from any reservation. By wasting space in each + * reservation, we prevent over allocation problems. + */ +int +xfs_log_reserve( + struct xfs_mount *mp, + int unit_bytes, + int cnt, + struct xlog_ticket **ticp, + __uint8_t client, + bool permanent, + uint t_type) +{ + struct log *log = mp->m_log; + struct xlog_ticket *tic; + int need_bytes; + int error = 0; + + ASSERT(client == XFS_TRANSACTION || client == XFS_LOG); + + if (XLOG_FORCED_SHUTDOWN(log)) + return XFS_ERROR(EIO); + + XFS_STATS_INC(xs_try_logspace); + + ASSERT(*ticp == NULL); + tic = xlog_ticket_alloc(log, unit_bytes, cnt, client, permanent, + KM_SLEEP | KM_MAYFAIL); + if (!tic) + return XFS_ERROR(ENOMEM); + + tic->t_trans_type = t_type; + *ticp = tic; + + xlog_grant_push_ail(log, tic->t_unit_res * tic->t_cnt); + + trace_xfs_log_reserve(log, tic); + + error = xlog_grant_head_check(log, &log->l_reserve_head, tic, + &need_bytes); + if (error) + goto out_error; + + xlog_grant_add_space(log, &log->l_reserve_head.grant, need_bytes); + xlog_grant_add_space(log, &log->l_write_head.grant, need_bytes); + trace_xfs_log_reserve_exit(log, tic); + xlog_verify_grant_tail(log); + return 0; + +out_error: + /* + * If we are failing, make sure the ticket doesn't have any current + * reservations. We don't want to add this back when the ticket/ + * transaction gets cancelled. + */ + tic->t_curr_res = 0; + tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ + return error; +} + + +/* * NOTES: * * 1. currblock field gets updated at startup and after in-core logs @@ -395,88 +550,6 @@ xfs_log_release_iclog( } /* - * 1. Reserve an amount of on-disk log space and return a ticket corresponding - * to the reservation. - * 2. Potentially, push buffers at tail of log to disk. - * - * Each reservation is going to reserve extra space for a log record header. - * When writes happen to the on-disk log, we don't subtract the length of the - * log record header from any reservation. By wasting space in each - * reservation, we prevent over allocation problems. - */ -int -xfs_log_reserve( - struct xfs_mount *mp, - int unit_bytes, - int cnt, - struct xlog_ticket **ticket, - __uint8_t client, - uint flags, - uint t_type) -{ - struct log *log = mp->m_log; - struct xlog_ticket *internal_ticket; - int retval = 0; - - ASSERT(client == XFS_TRANSACTION || client == XFS_LOG); - - if (XLOG_FORCED_SHUTDOWN(log)) - return XFS_ERROR(EIO); - - XFS_STATS_INC(xs_try_logspace); - - - if (*ticket != NULL) { - ASSERT(flags & XFS_LOG_PERM_RESERV); - internal_ticket = *ticket; - - /* - * this is a new transaction on the ticket, so we need to - * change the transaction ID so that the next transaction has a - * different TID in the log. Just add one to the existing tid - * so that we can see chains of rolling transactions in the log - * easily. - */ - internal_ticket->t_tid++; - - trace_xfs_log_reserve(log, internal_ticket); - - xlog_grant_push_ail(log, internal_ticket->t_unit_res); - retval = xlog_regrant_write_log_space(log, internal_ticket); - } else { - /* may sleep if need to allocate more tickets */ - internal_ticket = xlog_ticket_alloc(log, unit_bytes, cnt, - client, flags, - KM_SLEEP|KM_MAYFAIL); - if (!internal_ticket) - return XFS_ERROR(ENOMEM); - internal_ticket->t_trans_type = t_type; - *ticket = internal_ticket; - - trace_xfs_log_reserve(log, internal_ticket); - - xlog_grant_push_ail(log, - (internal_ticket->t_unit_res * - internal_ticket->t_cnt)); - retval = xlog_grant_log_space(log, internal_ticket); - } - - if (unlikely(retval)) { - /* - * If we are failing, make sure the ticket doesn't have any - * current reservations. We don't want to add this back - * when the ticket/ transaction gets cancelled. - */ - internal_ticket->t_curr_res = 0; - /* ungrant will give back unit_res * t_cnt. */ - internal_ticket->t_cnt = 0; - } - - return retval; -} - - -/* * Mount a log filesystem * * mp - ubiquitous xfs mount point structure @@ -653,8 +726,9 @@ xfs_log_unmount_write(xfs_mount_t *mp) .lv_iovecp = ®, }; - /* remove inited flag */ + /* remove inited flag, and account for space used */ tic->t_flags = 0; + tic->t_curr_res -= sizeof(magic); error = xlog_write(log, &vec, tic, &lsn, NULL, XLOG_UNMOUNT_TRANS); /* @@ -760,64 +834,35 @@ xfs_log_item_init( INIT_LIST_HEAD(&item->li_cil); } +/* + * Wake up processes waiting for log space after we have moved the log tail. + */ void -xfs_log_move_tail(xfs_mount_t *mp, - xfs_lsn_t tail_lsn) +xfs_log_space_wake( + struct xfs_mount *mp) { - xlog_ticket_t *tic; - xlog_t *log = mp->m_log; - int need_bytes, free_bytes; + struct log *log = mp->m_log; + int free_bytes; if (XLOG_FORCED_SHUTDOWN(log)) return; - if (tail_lsn == 0) - tail_lsn = atomic64_read(&log->l_last_sync_lsn); - - /* tail_lsn == 1 implies that we weren't passed a valid value. */ - if (tail_lsn != 1) - atomic64_set(&log->l_tail_lsn, tail_lsn); - - if (!list_empty_careful(&log->l_writeq)) { -#ifdef DEBUG - if (log->l_flags & XLOG_ACTIVE_RECOVERY) - panic("Recovery problem"); -#endif - spin_lock(&log->l_grant_write_lock); - free_bytes = xlog_space_left(log, &log->l_grant_write_head); - list_for_each_entry(tic, &log->l_writeq, t_queue) { - ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); + if (!list_empty_careful(&log->l_write_head.waiters)) { + ASSERT(!(log->l_flags & XLOG_ACTIVE_RECOVERY)); - if (free_bytes < tic->t_unit_res && tail_lsn != 1) - break; - tail_lsn = 0; - free_bytes -= tic->t_unit_res; - trace_xfs_log_regrant_write_wake_up(log, tic); - wake_up(&tic->t_wait); - } - spin_unlock(&log->l_grant_write_lock); + spin_lock(&log->l_write_head.lock); + free_bytes = xlog_space_left(log, &log->l_write_head.grant); + xlog_grant_head_wake(log, &log->l_write_head, &free_bytes); + spin_unlock(&log->l_write_head.lock); } - if (!list_empty_careful(&log->l_reserveq)) { -#ifdef DEBUG - if (log->l_flags & XLOG_ACTIVE_RECOVERY) - panic("Recovery problem"); -#endif - spin_lock(&log->l_grant_reserve_lock); - free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); - list_for_each_entry(tic, &log->l_reserveq, t_queue) { - if (tic->t_flags & XLOG_TIC_PERM_RESERV) - need_bytes = tic->t_unit_res*tic->t_cnt; - else - need_bytes = tic->t_unit_res; - if (free_bytes < need_bytes && tail_lsn != 1) - break; - tail_lsn = 0; - free_bytes -= need_bytes; - trace_xfs_log_grant_wake_up(log, tic); - wake_up(&tic->t_wait); - } - spin_unlock(&log->l_grant_reserve_lock); + if (!list_empty_careful(&log->l_reserve_head.waiters)) { + ASSERT(!(log->l_flags & XLOG_ACTIVE_RECOVERY)); + + spin_lock(&log->l_reserve_head.lock); + free_bytes = xlog_space_left(log, &log->l_reserve_head.grant); + xlog_grant_head_wake(log, &log->l_reserve_head, &free_bytes); + spin_unlock(&log->l_reserve_head.lock); } } @@ -867,21 +912,7 @@ xfs_log_need_covered(xfs_mount_t *mp) return needed; } -/****************************************************************************** - * - * local routines - * - ****************************************************************************** - */ - -/* xfs_trans_tail_ail returns 0 when there is nothing in the list. - * The log manager must keep track of the last LR which was committed - * to disk. The lsn of this LR will become the new tail_lsn whenever - * xfs_trans_tail_ail returns 0. If we don't do this, we run into - * the situation where stuff could be written into the log but nothing - * was ever in the AIL when asked. Eventually, we panic since the - * tail hits the head. - * +/* * We may be holding the log iclog lock upon entering this routine. */ xfs_lsn_t @@ -891,10 +922,17 @@ xlog_assign_tail_lsn( xfs_lsn_t tail_lsn; struct log *log = mp->m_log; + /* + * To make sure we always have a valid LSN for the log tail we keep + * track of the last LSN which was committed in log->l_last_sync_lsn, + * and use that when the AIL was empty and xfs_ail_min_lsn returns 0. + * + * If the AIL has been emptied we also need to wake any process + * waiting for this condition. + */ tail_lsn = xfs_ail_min_lsn(mp->m_ail); if (!tail_lsn) tail_lsn = atomic64_read(&log->l_last_sync_lsn); - atomic64_set(&log->l_tail_lsn, tail_lsn); return tail_lsn; } @@ -1100,12 +1138,9 @@ xlog_alloc_log(xfs_mount_t *mp, xlog_assign_atomic_lsn(&log->l_tail_lsn, 1, 0); xlog_assign_atomic_lsn(&log->l_last_sync_lsn, 1, 0); log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ - xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); - xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); - INIT_LIST_HEAD(&log->l_reserveq); - INIT_LIST_HEAD(&log->l_writeq); - spin_lock_init(&log->l_grant_reserve_lock); - spin_lock_init(&log->l_grant_write_lock); + + xlog_grant_head_init(&log->l_reserve_head); + xlog_grant_head_init(&log->l_write_head); error = EFSCORRUPTED; if (xfs_sb_version_hassector(&mp->m_sb)) { @@ -1280,7 +1315,7 @@ xlog_grant_push_ail( ASSERT(BTOBB(need_bytes) < log->l_logBBsize); - free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); + free_bytes = xlog_space_left(log, &log->l_reserve_head.grant); free_blocks = BTOBBT(free_bytes); /* @@ -1412,8 +1447,8 @@ xlog_sync(xlog_t *log, roundoff < BBTOB(1))); /* move grant heads by roundoff in sync */ - xlog_grant_add_space(log, &log->l_grant_reserve_head, roundoff); - xlog_grant_add_space(log, &log->l_grant_write_head, roundoff); + xlog_grant_add_space(log, &log->l_reserve_head.grant, roundoff); + xlog_grant_add_space(log, &log->l_write_head.grant, roundoff); /* put cycle number in every block */ xlog_pack_data(log, iclog, roundoff); @@ -2566,119 +2601,6 @@ restart: return 0; } /* xlog_state_get_iclog_space */ -/* - * Atomically get the log space required for a log ticket. - * - * Once a ticket gets put onto the reserveq, it will only return after the - * needed reservation is satisfied. - * - * This function is structured so that it has a lock free fast path. This is - * necessary because every new transaction reservation will come through this - * path. Hence any lock will be globally hot if we take it unconditionally on - * every pass. - * - * As tickets are only ever moved on and off the reserveq under the - * l_grant_reserve_lock, we only need to take that lock if we are going to add - * the ticket to the queue and sleep. We can avoid taking the lock if the ticket - * was never added to the reserveq because the t_queue list head will be empty - * and we hold the only reference to it so it can safely be checked unlocked. - */ -STATIC int -xlog_grant_log_space( - struct log *log, - struct xlog_ticket *tic) -{ - int free_bytes, need_bytes; - int error = 0; - - ASSERT(!(log->l_flags & XLOG_ACTIVE_RECOVERY)); - - trace_xfs_log_grant_enter(log, tic); - - /* - * If there are other waiters on the queue then give them a chance at - * logspace before us. Wake up the first waiters, if we do not wake - * up all the waiters then go to sleep waiting for more free space, - * otherwise try to get some space for this transaction. - */ - need_bytes = tic->t_unit_res; - if (tic->t_flags & XFS_LOG_PERM_RESERV) - need_bytes *= tic->t_ocnt; - free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); - if (!list_empty_careful(&log->l_reserveq)) { - spin_lock(&log->l_grant_reserve_lock); - if (!xlog_reserveq_wake(log, &free_bytes) || - free_bytes < need_bytes) - error = xlog_reserveq_wait(log, tic, need_bytes); - spin_unlock(&log->l_grant_reserve_lock); - } else if (free_bytes < need_bytes) { - spin_lock(&log->l_grant_reserve_lock); - error = xlog_reserveq_wait(log, tic, need_bytes); - spin_unlock(&log->l_grant_reserve_lock); - } - if (error) - return error; - - xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); - xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); - trace_xfs_log_grant_exit(log, tic); - xlog_verify_grant_tail(log); - return 0; -} - -/* - * Replenish the byte reservation required by moving the grant write head. - * - * Similar to xlog_grant_log_space, the function is structured to have a lock - * free fast path. - */ -STATIC int -xlog_regrant_write_log_space( - struct log *log, - struct xlog_ticket *tic) -{ - int free_bytes, need_bytes; - int error = 0; - - tic->t_curr_res = tic->t_unit_res; - xlog_tic_reset_res(tic); - - if (tic->t_cnt > 0) - return 0; - - ASSERT(!(log->l_flags & XLOG_ACTIVE_RECOVERY)); - - trace_xfs_log_regrant_write_enter(log, tic); - - /* - * If there are other waiters on the queue then give them a chance at - * logspace before us. Wake up the first waiters, if we do not wake - * up all the waiters then go to sleep waiting for more free space, - * otherwise try to get some space for this transaction. - */ - need_bytes = tic->t_unit_res; - free_bytes = xlog_space_left(log, &log->l_grant_write_head); - if (!list_empty_careful(&log->l_writeq)) { - spin_lock(&log->l_grant_write_lock); - if (!xlog_writeq_wake(log, &free_bytes) || - free_bytes < need_bytes) - error = xlog_writeq_wait(log, tic, need_bytes); - spin_unlock(&log->l_grant_write_lock); - } else if (free_bytes < need_bytes) { - spin_lock(&log->l_grant_write_lock); - error = xlog_writeq_wait(log, tic, need_bytes); - spin_unlock(&log->l_grant_write_lock); - } - - if (error) - return error; - - xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); - trace_xfs_log_regrant_write_exit(log, tic); - xlog_verify_grant_tail(log); - return 0; -} - /* The first cnt-1 times through here we don't need to * move the grant write head because the permanent * reservation has reserved cnt times the unit amount. @@ -2695,9 +2617,9 @@ xlog_regrant_reserve_log_space(xlog_t *log, if (ticket->t_cnt > 0) ticket->t_cnt--; - xlog_grant_sub_space(log, &log->l_grant_reserve_head, + xlog_grant_sub_space(log, &log->l_reserve_head.grant, ticket->t_curr_res); - xlog_grant_sub_space(log, &log->l_grant_write_head, + xlog_grant_sub_space(log, &log->l_write_head.grant, ticket->t_curr_res); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); @@ -2708,7 +2630,7 @@ xlog_regrant_reserve_log_space(xlog_t *log, if (ticket->t_cnt > 0) return; - xlog_grant_add_space(log, &log->l_grant_reserve_head, + xlog_grant_add_space(log, &log->l_reserve_head.grant, ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); @@ -2754,14 +2676,13 @@ xlog_ungrant_log_space(xlog_t *log, bytes += ticket->t_unit_res*ticket->t_cnt; } - xlog_grant_sub_space(log, &log->l_grant_reserve_head, bytes); - xlog_grant_sub_space(log, &log->l_grant_write_head, bytes); + xlog_grant_sub_space(log, &log->l_reserve_head.grant, bytes); + xlog_grant_sub_space(log, &log->l_write_head.grant, bytes); trace_xfs_log_ungrant_exit(log, ticket); - xfs_log_move_tail(log->l_mp, 1); -} /* xlog_ungrant_log_space */ - + xfs_log_space_wake(log->l_mp); +} /* * Flush iclog to disk if this is the last reference to the given iclog and @@ -3219,7 +3140,7 @@ xlog_ticket_alloc( int unit_bytes, int cnt, char client, - uint xflags, + bool permanent, int alloc_flags) { struct xlog_ticket *tic; @@ -3313,6 +3234,7 @@ xlog_ticket_alloc( } atomic_set(&tic->t_ref, 1); + tic->t_task = current; INIT_LIST_HEAD(&tic->t_queue); tic->t_unit_res = unit_bytes; tic->t_curr_res = unit_bytes; @@ -3322,9 +3244,8 @@ xlog_ticket_alloc( tic->t_clientid = client; tic->t_flags = XLOG_TIC_INITED; tic->t_trans_type = 0; - if (xflags & XFS_LOG_PERM_RESERV) + if (permanent) tic->t_flags |= XLOG_TIC_PERM_RESERV; - init_waitqueue_head(&tic->t_wait); xlog_tic_reset_res(tic); @@ -3380,7 +3301,7 @@ xlog_verify_grant_tail( int tail_cycle, tail_blocks; int cycle, space; - xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space); + xlog_crack_grant_head(&log->l_write_head.grant, &cycle, &space); xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_blocks); if (tail_cycle != cycle) { if (cycle - 1 != tail_cycle && @@ -3582,7 +3503,6 @@ xfs_log_force_umount( struct xfs_mount *mp, int logerror) { - xlog_ticket_t *tic; xlog_t *log; int retval; @@ -3650,15 +3570,8 @@ xfs_log_force_umount( * we don't enqueue anything once the SHUTDOWN flag is set, and this * action is protected by the grant locks. */ - spin_lock(&log->l_grant_reserve_lock); - list_for_each_entry(tic, &log->l_reserveq, t_queue) - wake_up(&tic->t_wait); - spin_unlock(&log->l_grant_reserve_lock); - - spin_lock(&log->l_grant_write_lock); - list_for_each_entry(tic, &log->l_writeq, t_queue) - wake_up(&tic->t_wait); - spin_unlock(&log->l_grant_write_lock); + xlog_grant_head_wake_all(&log->l_reserve_head); + xlog_grant_head_wake_all(&log->l_write_head); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { ASSERT(!logerror); |