| log.c (0bd2af46839ad6262d25714a6ec0365db9d6b98f) | log.c (b004157ab5b374a498a5874cda68c389219d23e7) |
|---|---|
| 1/* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ --- 247 unchanged lines hidden (view full) --- 256 gfs2_log_unlock(sdp); 257} 258 259/** 260 * gfs2_log_reserve - Make a log reservation 261 * @sdp: The GFS2 superblock 262 * @blks: The number of blocks to reserve 263 * | 1/* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ --- 247 unchanged lines hidden (view full) --- 256 gfs2_log_unlock(sdp); 257} 258 259/** 260 * gfs2_log_reserve - Make a log reservation 261 * @sdp: The GFS2 superblock 262 * @blks: The number of blocks to reserve 263 * |
| 264 * Note that we never give out the last 6 blocks of the journal. Thats 265 * due to the fact that there is are a small number of header blocks 266 * associated with each log flush. The exact number can't be known until 267 * flush time, so we ensure that we have just enough free blocks at all 268 * times to avoid running out during a log flush. 269 * |
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| 264 * Returns: errno 265 */ 266 267int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks) 268{ 269 unsigned int try = 0; 270 271 if (gfs2_assert_warn(sdp, blks) || 272 gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks)) 273 return -EINVAL; 274 275 mutex_lock(&sdp->sd_log_reserve_mutex); 276 gfs2_log_lock(sdp); | 270 * Returns: errno 271 */ 272 273int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks) 274{ 275 unsigned int try = 0; 276 277 if (gfs2_assert_warn(sdp, blks) || 278 gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks)) 279 return -EINVAL; 280 281 mutex_lock(&sdp->sd_log_reserve_mutex); 282 gfs2_log_lock(sdp); |
| 277 while(sdp->sd_log_blks_free <= blks) { | 283 while(sdp->sd_log_blks_free <= (blks + 6)) { |
| 278 gfs2_log_unlock(sdp); 279 gfs2_ail1_empty(sdp, 0); 280 gfs2_log_flush(sdp, NULL); 281 282 if (try++) 283 gfs2_ail1_start(sdp, 0); 284 gfs2_log_lock(sdp); 285 } --- 352 unchanged lines hidden (view full) --- 638{ 639 log_refund(sdp, tr); 640 lops_incore_commit(sdp, tr); 641 642 sdp->sd_vfs->s_dirt = 1; 643 up_read(&sdp->sd_log_flush_lock); 644 645 gfs2_log_lock(sdp); | 284 gfs2_log_unlock(sdp); 285 gfs2_ail1_empty(sdp, 0); 286 gfs2_log_flush(sdp, NULL); 287 288 if (try++) 289 gfs2_ail1_start(sdp, 0); 290 gfs2_log_lock(sdp); 291 } --- 352 unchanged lines hidden (view full) --- 644{ 645 log_refund(sdp, tr); 646 lops_incore_commit(sdp, tr); 647 648 sdp->sd_vfs->s_dirt = 1; 649 up_read(&sdp->sd_log_flush_lock); 650 651 gfs2_log_lock(sdp); |
| 646 if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) { 647 gfs2_log_unlock(sdp); 648 gfs2_log_flush(sdp, NULL); 649 } else { 650 gfs2_log_unlock(sdp); 651 } | 652 if (sdp->sd_log_num_buf > gfs2_tune_get(sdp, gt_incore_log_blocks)) 653 wake_up_process(sdp->sd_logd_process); 654 gfs2_log_unlock(sdp); |
| 652} 653 654/** 655 * gfs2_log_shutdown - write a shutdown header into a journal 656 * @sdp: the filesystem 657 * 658 */ 659 --- 29 unchanged lines hidden --- | 655} 656 657/** 658 * gfs2_log_shutdown - write a shutdown header into a journal 659 * @sdp: the filesystem 660 * 661 */ 662 --- 29 unchanged lines hidden --- |