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GFS2: Log the reason for log flushes in every log header

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This patch just adds the capability for GFS2 to track which function
called gfs2_log_flush. This should make it easier to diagnose
problems based on the sequence of events found in the journals.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Bob Peterson
2018-01-08 10:34:17 -05:00
parent c1696fb85d
commit 805c090750
11 changed files with 66 additions and 26 deletions
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14
fs/gfs2/log.c
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@@ -757,7 +757,7 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags)
* gfs2_log_flush - flush incore transaction(s)
* @sdp: the filesystem
* @gl: The glock structure to flush. If NULL, flush the whole incore log
* @flags: The log header flags: GFS2_LOG_HEAD_FLUSH_*
* @flags: The log header flags: GFS2_LOG_HEAD_FLUSH_* and debug flags
*
*/
@@ -773,7 +773,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags)
up_write(&sdp->sd_log_flush_lock);
return;
}
trace_gfs2_log_flush(sdp, 1);
trace_gfs2_log_flush(sdp, 1, flags);
if (flags & GFS2_LOG_HEAD_FLUSH_SHUTDOWN)
clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
@@ -841,7 +841,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags)
atomic_set(&sdp->sd_freeze_state, SFS_FROZEN);
}
trace_gfs2_log_flush(sdp, 0);
trace_gfs2_log_flush(sdp, 0, flags);
up_write(&sdp->sd_log_flush_lock);
kfree(tr);
@@ -937,7 +937,7 @@ void gfs2_log_shutdown(struct gfs2_sbd *sdp)
sdp->sd_log_flush_head = sdp->sd_log_head;
log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT);
log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT | GFS2_LFC_SHUTDOWN);
gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail);
gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list));
@@ -993,7 +993,8 @@ int gfs2_logd(void *data)
did_flush = false;
if (gfs2_jrnl_flush_reqd(sdp) || t == 0) {
gfs2_ail1_empty(sdp);
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL);
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
GFS2_LFC_LOGD_JFLUSH_REQD);
did_flush = true;
}
@@ -1001,7 +1002,8 @@ int gfs2_logd(void *data)
gfs2_ail1_start(sdp);
gfs2_ail1_wait(sdp);
gfs2_ail1_empty(sdp);
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL);
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
GFS2_LFC_LOGD_AIL_FLUSH_REQD);
did_flush = true;
}