GFS2: Made logd daemon take into account log demand
Before this patch, the logd daemon only tried to flush things when
the log blocks pinned exceeded a certain threshold. But when we're
deleting very large files, it may require a huge number of journal
blocks, and that, in turn, may exceed the threshold. This patch
factors that into account.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index a6a3389..00d8dc2 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -794,6 +794,7 @@
atomic_t sd_log_thresh1;
atomic_t sd_log_thresh2;
atomic_t sd_log_blks_free;
+ atomic_t sd_log_blks_needed;
wait_queue_head_t sd_log_waitq;
wait_queue_head_t sd_logd_waitq;
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index e58ccef0..4df349c 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -349,6 +349,7 @@
if (gfs2_assert_warn(sdp, blks) ||
gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks))
return -EINVAL;
+ atomic_add(blks, &sdp->sd_log_blks_needed);
retry:
free_blocks = atomic_read(&sdp->sd_log_blks_free);
if (unlikely(free_blocks <= wanted)) {
@@ -370,6 +371,7 @@
wake_up(&sdp->sd_reserving_log_wait);
goto retry;
}
+ atomic_sub(blks, &sdp->sd_log_blks_needed);
trace_gfs2_log_blocks(sdp, -blks);
/*
@@ -891,13 +893,16 @@
static inline int gfs2_jrnl_flush_reqd(struct gfs2_sbd *sdp)
{
- return (atomic_read(&sdp->sd_log_pinned) >= atomic_read(&sdp->sd_log_thresh1));
+ return (atomic_read(&sdp->sd_log_pinned) +
+ atomic_read(&sdp->sd_log_blks_needed) >=
+ atomic_read(&sdp->sd_log_thresh1));
}
static inline int gfs2_ail_flush_reqd(struct gfs2_sbd *sdp)
{
unsigned int used_blocks = sdp->sd_jdesc->jd_blocks - atomic_read(&sdp->sd_log_blks_free);
- return used_blocks >= atomic_read(&sdp->sd_log_thresh2);
+ return used_blocks + atomic_read(&sdp->sd_log_blks_needed) >=
+ atomic_read(&sdp->sd_log_thresh2);
}
/**
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index ff72ac6..86281a9 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -683,6 +683,7 @@
goto fail_jindex;
}
+ atomic_set(&sdp->sd_log_blks_needed, 0);
if (sdp->sd_args.ar_spectator) {
sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
