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[GFS2] Use atomic_t for journal free blocks counter 

This patch changes the counter which keeps track of the free
blocks in the journal to an atomic_t in preparation for the
following patch which will update the log reservation code.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2007-11-08 14:55:03 +00:00
parent 2bcd610d2f
commit fd041f0b40
3 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/gfs2/incore.h
View File

@ -595,7 +595,7 @@ struct gfs2_sbd {
struct list_head sd_log_le_databuf;
struct list_head sd_log_le_ordered;
unsigned int sd_log_blks_free;
atomic_t sd_log_blks_free;
struct mutex sd_log_reserve_mutex;
u64 sd_log_sequence;

26
fs/gfs2/log.c
View File

@ -301,7 +301,7 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
mutex_lock(&sdp->sd_log_reserve_mutex);
gfs2_log_lock(sdp);
while(sdp->sd_log_blks_free <= (blks + reserved_blks)) {
while(atomic_read(&sdp->sd_log_blks_free) <= (blks + reserved_blks)) {
gfs2_log_unlock(sdp);
gfs2_ail1_empty(sdp, 0);
gfs2_log_flush(sdp, NULL);
@ -310,7 +310,7 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
gfs2_ail1_start(sdp, 0);
gfs2_log_lock(sdp);
}
sdp->sd_log_blks_free -= blks;
atomic_sub(blks, &sdp->sd_log_blks_free);
gfs2_log_unlock(sdp);
mutex_unlock(&sdp->sd_log_reserve_mutex);
@ -330,9 +330,9 @@ void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks)
{
gfs2_log_lock(sdp);
sdp->sd_log_blks_free += blks;
atomic_add(blks, &sdp->sd_log_blks_free);
gfs2_assert_withdraw(sdp,
sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
atomic_read(&sdp->sd_log_blks_free) <= sdp->sd_jdesc->jd_blocks);
gfs2_log_unlock(sdp);
up_read(&sdp->sd_log_flush_lock);
}
@ -559,8 +559,8 @@ static void log_pull_tail(struct gfs2_sbd *sdp, unsigned int new_tail)
ail2_empty(sdp, new_tail);
gfs2_log_lock(sdp);
sdp->sd_log_blks_free += dist;
gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <= sdp->sd_jdesc->jd_blocks);
atomic_add(dist, &sdp->sd_log_blks_free);
gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <= sdp->sd_jdesc->jd_blocks);
gfs2_log_unlock(sdp);
sdp->sd_log_tail = new_tail;
@ -733,7 +733,7 @@ void __gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
log_flush_commit(sdp);
else if (sdp->sd_log_tail != current_tail(sdp) && !sdp->sd_log_idle){
gfs2_log_lock(sdp);
sdp->sd_log_blks_free--; /* Adjust for unreserved buffer */
atomic_dec(&sdp->sd_log_blks_free); /* Adjust for unreserved buffer */
gfs2_log_unlock(sdp);
log_write_header(sdp, 0, PULL);
}
@ -773,12 +773,12 @@ static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;
gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0);
reserved = calc_reserved(sdp);
old = sdp->sd_log_blks_free;
sdp->sd_log_blks_free += tr->tr_reserved -
(reserved - sdp->sd_log_blks_reserved);
old = atomic_read(&sdp->sd_log_blks_free);
atomic_add(tr->tr_reserved - (reserved - sdp->sd_log_blks_reserved),
&sdp->sd_log_blks_free);
gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free >= old);
gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free <=
gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) >= old);
gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <=
sdp->sd_jdesc->jd_blocks);
sdp->sd_log_blks_reserved = reserved;
@ -831,7 +831,7 @@ void gfs2_log_shutdown(struct gfs2_sbd *sdp)
log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT,
(sdp->sd_log_tail == current_tail(sdp)) ? 0 : PULL);
gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks);
gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks);
gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail);
gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list));

4
fs/gfs2/ops_fstype.c
View File

@ -339,7 +339,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
if (sdp->sd_args.ar_spectator) {
sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
} else {
if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
fs_err(sdp, "can't mount journal #%u\n",
@ -376,7 +376,7 @@ static int init_journal(struct gfs2_sbd *sdp, int undo)
sdp->sd_jdesc->jd_jid, error);
goto fail_jinode_gh;
}
sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
}
if (sdp->sd_lockstruct.ls_first) {