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Commit e179840d authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Ben Myers
Browse files

xfs: share code for grant head wakeups 



Reviewed-by: default avatarMark Tinguely <tinguely@sgi.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Signed-off-by: default avatarBen Myers <bpm@sgi.com>
parent 23ee3df3

fs/xfs/xfs_log.c

+20 −30
Original line number Diff line number Diff line
@@ -171,49 +171,39 @@ xlog_grant_head_wake_all( 
	spin_unlock(&head->lock);

}



STATIC bool

xlog_reserveq_wake(

static inline int

xlog_ticket_reservation(

	struct log		*log,

	int			*free_bytes)

	struct xlog_grant_head	*head,

	struct xlog_ticket	*tic)

{

	struct xlog_ticket	*tic;

	int			need_bytes;



	list_for_each_entry(tic, &log->l_reserve_head.waiters, t_queue) {

	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_process(tic->t_task);

			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_write_head.waiters, 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);

		*free_bytes -= need_bytes;

		trace_xfs_log_grant_wake_up(log, tic);

		wake_up_process(tic->t_task);

	}
@@ -772,7 +762,7 @@ xfs_log_space_wake( 


		spin_lock(&log->l_write_head.lock);

		free_bytes = xlog_space_left(log, &log->l_write_head.grant);

		xlog_writeq_wake(log, &free_bytes);

		xlog_grant_head_wake(log, &log->l_write_head, &free_bytes);

		spin_unlock(&log->l_write_head.lock);

	}
@@ -781,7 +771,7 @@ xfs_log_space_wake( 


		spin_lock(&log->l_reserve_head.lock);

		free_bytes = xlog_space_left(log, &log->l_reserve_head.grant);

		xlog_reserveq_wake(log, &free_bytes);

		xlog_grant_head_wake(log, &log->l_reserve_head, &free_bytes);

		spin_unlock(&log->l_reserve_head.lock);

	}

}
@@ -2562,7 +2552,7 @@ xlog_grant_log_space( 
	free_bytes = xlog_space_left(log, &log->l_reserve_head.grant);

	if (!list_empty_careful(&log->l_reserve_head.waiters)) {

		spin_lock(&log->l_reserve_head.lock);

		if (!xlog_reserveq_wake(log, &free_bytes) ||

		if (!xlog_grant_head_wake(log, &log->l_reserve_head, &free_bytes) ||

		    free_bytes < need_bytes) {

			error = xlog_grant_head_wait(log, &log->l_reserve_head,

						     tic, need_bytes);
@@ -2618,7 +2608,7 @@ xlog_regrant_write_log_space( 
	free_bytes = xlog_space_left(log, &log->l_write_head.grant);

	if (!list_empty_careful(&log->l_write_head.waiters)) {

		spin_lock(&log->l_write_head.lock);

		if (!xlog_writeq_wake(log, &free_bytes) ||

		if (!xlog_grant_head_wake(log, &log->l_write_head, &free_bytes) ||

		    free_bytes < need_bytes) {

			error = xlog_grant_head_wait(log, &log->l_write_head,

						     tic, need_bytes);

fs/xfs/xfs_trace.h

+0 −1
Original line number Diff line number Diff line
@@ -837,7 +837,6 @@ DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake_up); 
DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_enter);

DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_exit);

DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_error);

DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake_up);

DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_enter);

DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_exit);

DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_sub);