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GFS2: Switch tr_touched to flag in transaction

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This patch eliminates the int variable tr_touched in favor of a
new flag in the transaction. This is a step toward reducing contention
on the gfs2_log_lock spin_lock.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Bob Peterson
2017-01-25 12:50:47 -05:00
parent b63f5e8482
commit 9862ca056e
4 changed files with 23 additions and 18 deletions
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6
fs/gfs2/log.c
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@ -799,7 +799,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
static void gfs2_merge_trans(struct gfs2_trans *old, struct gfs2_trans *new)
{
WARN_ON_ONCE(old->tr_attached != 1);
WARN_ON_ONCE(!test_bit(TR_ATTACHED, &old->tr_flags));
old->tr_num_buf_new += new->tr_num_buf_new;
old->tr_num_databuf_new += new->tr_num_databuf_new;
@ -823,9 +823,9 @@ static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
if (sdp->sd_log_tr) {
gfs2_merge_trans(sdp->sd_log_tr, tr);
} else if (tr->tr_num_buf_new || tr->tr_num_databuf_new) {
gfs2_assert_withdraw(sdp, tr->tr_alloced);
gfs2_assert_withdraw(sdp, test_bit(TR_ALLOCED, &tr->tr_flags));
sdp->sd_log_tr = tr;
tr->tr_attached = 1;
set_bit(TR_ATTACHED, &tr->tr_flags);
}
sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;