fs/gfs2/log.c

42  * Compute the number of log descriptor blocks needed to hold a certain number
45  * Returns: the number of blocks needed (minimum is always 1)
58 		/* Subsequent struct gfs2_meta_header blocks */
467  * gfs2_log_release - Release a given number of log blocks
469  * @blks: The number of blocks
486  * @blks: The number of blocks to reserve
487  * @taboo_blks: The number of blocks to leave free
512  * @blks: The number of blocks to reserve
513  * @taboo_blks: The number of blocks to leave free
613  * log_distance - Compute distance between two journal blocks
619  *   blocks in the journal
621  * Returns: the distance in blocks
637  * calc_reserved - Calculate the number of blocks to keep reserved
641  * metadata blocks (e.g. normal file I/O rewriting file time stamps) and
642  * all our journaled data blocks for journaled files (e.g. files in the
646  * We can have metadata blocks and jdata blocks in the same journal.  Each
649  * in cases where we have more blocks than will fit in a log descriptor.
652  * Also, we need to reserve blocks for revoke journal entries and one for an
655  * Returns: the number of blocks reserved
660 	unsigned int blocks;
664 		blocks = tr->tr_num_buf_new - tr->tr_num_buf_rm;
665 		reserved += blocks + DIV_ROUND_UP(blocks, buf_limit(sdp));
666 		blocks = tr->tr_num_databuf_new - tr->tr_num_databuf_rm;
667 		reserved += blocks + DIV_ROUND_UP(blocks, databuf_limit(sdp));
801  * We can fill that space with additional revokes for blocks that have already
803  * us from having to keep track of those blocks on the AIL2 list later.
1258  * We wake up gfs2_logd if the number of pinned blocks exceed thresh1
1259  * or the total number of used blocks (pinned blocks plus AIL blocks)
1296  * gfs2_logd - Update log tail as Active Items get flushed to in-place blocks