61  * Check if the current log item was first committed in this sequence.
63  * the recorded commit sequence number.
80 	 * current sequence, we're in a new checkpoint.  in xlog_item_in_current_chkpt()
194 	ctx->sequence = ++cil->xc_current_sequence;  in xlog_cil_ctx_switch()
214 	log->l_cilp->xc_ctx->sequence = 1;  in xlog_cil_init_post_recovery()
412 	 * CIL, store the sequence number on the log item so we can  in xfs_cil_prepare_item()
417 		lv->lv_item->li_seq = log->l_cilp->xc_ctx->sequence;  in xfs_cil_prepare_item()
832 	 * sequence to have the ordered commit record assigned to a physical  in xlog_cil_set_ctx_write_state()
844  * Ensure that the order of log writes follows checkpoint sequence order. This
856 	xfs_csn_t		sequence,  in xlog_cil_order_write()  argument
876 		 * Don't wait for our own sequence, either.  in xlog_cil_order_write()
878 		if (ctx->sequence >= sequence)  in xlog_cil_order_write()
904  * sequence order so that log recovery will always use in-order start LSNs when
915 	error = xlog_cil_order_write(ctx->cil, ctx->sequence, _START_RECORD);  in xlog_cil_write_chain()
924  * sequence order so that log recovery will always replay the checkpoints in the
953 	error = xlog_cil_order_write(ctx->cil, ctx->sequence, _COMMIT_RECORD);  in xlog_cil_write_commit_record()
1109  * If the current sequence is the same as xc_push_seq we need to do a flush. If
1110  * xc_push_seq is less than the current sequence, then it has already been
1114  * xc_push_seq is checked unlocked against the sequence number for a match.
1116  * same sequence twice.  If we get a race between multiple pushes for the same
1117  * sequence they will block on the first one and then abort, hence avoiding
1146 	ASSERT(push_seq <= ctx->sequence);  in xlog_cil_push_work()
1165 	 * move on to a new sequence number and so we have to be able to push  in xlog_cil_push_work()
1166 	 * this sequence again later.  in xlog_cil_push_work()
1175 	/* check for a previously pushed sequence */  in xlog_cil_push_work()
1176 	if (push_seq < ctx->sequence) {  in xlog_cil_push_work()
1188 	 *	the current sequence not being found on the committing list;  in xlog_cil_push_work()
1190 	 *	an unchanged sequence number  in xlog_cil_push_work()
1193 	 * list before emptying the CIL and bumping the sequence number. Hence  in xlog_cil_push_work()
1194 	 * an empty CIL and an unchanged sequence number means we jumped out  in xlog_cil_push_work()
1197 	 * Hence the waiter will either find the commit sequence on the  in xlog_cil_push_work()
1198 	 * committing list or the sequence number will be unchanged and the CIL  in xlog_cil_push_work()
1202 	 * sequence may fully commit between the attempts the wait makes to wait  in xlog_cil_push_work()
1203 	 * on the commit sequence.  in xlog_cil_push_work()
1229 	 * xfs_log_force_seq requires us to mirror the new sequence into the cil  in xlog_cil_push_work()
1230 	 * structure atomically with the addition of this sequence to the  in xlog_cil_push_work()
1232 	 * against the current sequence in log forces without risking  in xlog_cil_push_work()
1434  * xlog_cil_push_now() is used to trigger an immediate CIL push to the sequence
1480 	 * If the CIL is empty or we've already pushed the sequence then  in xlog_cil_push_now()
1606 			lip->li_ops->iop_committing(lip, cil->xc_ctx->sequence);  in xlog_cil_commit()
1609 		*commit_seq = cil->xc_ctx->sequence;  in xlog_cil_commit()
1638  * Conditionally push the CIL based on the sequence passed in.
1640  * We only need to push if we haven't already pushed the sequence number given.
1641  * Hence the only time we will trigger a push here is if the push sequence is
1650 	xfs_csn_t	sequence)  in xlog_cil_force_seq()  argument
1656 	ASSERT(sequence <= cil->xc_current_sequence);  in xlog_cil_force_seq()
1658 	if (!sequence)  in xlog_cil_force_seq()
1659 		sequence = cil->xc_current_sequence;  in xlog_cil_force_seq()
1660 	trace_xfs_log_force(log->l_mp, sequence, _RET_IP_);  in xlog_cil_force_seq()
1664 	 * xlog_cil_push() handles racing pushes for the same sequence,  in xlog_cil_force_seq()
1668 	xlog_cil_push_now(log, sequence, false);  in xlog_cil_force_seq()
1671 	 * See if we can find a previous sequence still committing.  in xlog_cil_force_seq()
1672 	 * We need to wait for all previous sequence commits to complete  in xlog_cil_force_seq()
1685 		if (ctx->sequence > sequence)  in xlog_cil_force_seq()
1696 		if (ctx->sequence != sequence)  in xlog_cil_force_seq()
1704 	 * Hence by the time we have got here it our sequence may not have been  in xlog_cil_force_seq()
1705 	 * pushed yet. This is true if the current sequence still matches the  in xlog_cil_force_seq()
1706 	 * push sequence after the above wait loop and the CIL still contains  in xlog_cil_force_seq()
1711 	 * current sequence number is unchanged then the CIL contents are  in xlog_cil_force_seq()
1717 	if (sequence == cil->xc_current_sequence &&  in xlog_cil_force_seq()