From 7bd8b2eb32c404ebe61986083ce02642b6ff3bf6 Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Wed, 10 Apr 2013 10:32:05 +0100 Subject: [PATCH] GFS2: Add origin indicator to glock demote tracing This adds the origin indicator to the trace point for glock demotion, so that it is possible to see where demote requests have come from. Note that requests generated from the demote_rq sysfs interface will show as remote, since they are intended to replicate exactly the effect of a demote reuqest from a remote node. It is still possible to tell these apart by looking at the process which initiated the demote request. Signed-off-by: Steven Whitehouse --- fs/gfs2/glock.c | 2 +- fs/gfs2/trace_gfs2.h | 11 +++++++---- 2 files changed, 8 insertions(+), 5 deletions(-) diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 77d7927bcd75..3b9e1788ebf9 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -926,7 +926,7 @@ static void handle_callback(struct gfs2_glock *gl, unsigned int state, } if (gl->gl_ops->go_callback) gl->gl_ops->go_callback(gl, remote); - trace_gfs2_demote_rq(gl); + trace_gfs2_demote_rq(gl, remote); } void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...) diff --git a/fs/gfs2/trace_gfs2.h b/fs/gfs2/trace_gfs2.h index 2ee13e841e9f..20c007d747ab 100644 --- a/fs/gfs2/trace_gfs2.h +++ b/fs/gfs2/trace_gfs2.h @@ -159,9 +159,9 @@ TRACE_EVENT(gfs2_glock_put, /* Callback (local or remote) requesting lock demotion */ TRACE_EVENT(gfs2_demote_rq, - TP_PROTO(const struct gfs2_glock *gl), + TP_PROTO(const struct gfs2_glock *gl, bool remote), - TP_ARGS(gl), + TP_ARGS(gl, remote), TP_STRUCT__entry( __field( dev_t, dev ) @@ -170,6 +170,7 @@ TRACE_EVENT(gfs2_demote_rq, __field( u8, cur_state ) __field( u8, dmt_state ) __field( unsigned long, flags ) + __field( bool, remote ) ), TP_fast_assign( @@ -179,14 +180,16 @@ TRACE_EVENT(gfs2_demote_rq, __entry->cur_state = glock_trace_state(gl->gl_state); __entry->dmt_state = glock_trace_state(gl->gl_demote_state); __entry->flags = gl->gl_flags | (gl->gl_object ? (1UL<remote = remote; ), - TP_printk("%u,%u glock %d:%lld demote %s to %s flags:%s", + TP_printk("%u,%u glock %d:%lld demote %s to %s flags:%s %s", MAJOR(__entry->dev), MINOR(__entry->dev), __entry->gltype, (unsigned long long)__entry->glnum, glock_trace_name(__entry->cur_state), glock_trace_name(__entry->dmt_state), - show_glock_flags(__entry->flags)) + show_glock_flags(__entry->flags), + __entry->remote ? "remote" : "local") ); -- GitLab