kernel/include/trace/events/btrfs.h, branch linux-3.17.y

btrfs: Add trace for btrfs_workqueue alloc/destroy

2014-03-21T00:15:28Z

Since most of the btrfs_workqueue is printed as pointer address, for easier analysis, add trace for btrfs_workqueue alloc/destroy. So it is possible to determine the workqueue that a given work belongs to(by comparing the wq pointer address with alloc trace event). Signed-off-by: Qu Wenruo Signed-off-by: Chris Mason

btrfs: Add ftrace for btrfs_workqueue

2014-03-10T19:17:21Z

Add ftrace for btrfs_workqueue for further workqueue tunning. This patch needs to applied after the workqueue replace patchset. Signed-off-by: Qu Wenruo Signed-off-by: Josef Bacik

Btrfs/tracepoint: update new flags for ordered extent TP

2014-01-28T21:19:38Z

Flag BTRFS_ORDERED_TRUNCATED is a new one, update the tracepoint to support it. Signed-off-by: Liu Bo Signed-off-by: Josef Bacik Signed-off-by: Chris Mason

Btrfs/tracepoint: fix to report right flags for ordered extent

2014-01-28T21:19:38Z

We use set_bit() to assign ordered extent's flags, but in the related tracepoint we don't do the same thing, which makes the trace output not to parse flags correctly. Also, since the flags are bits stuff, we change to use __print_flags with a 'delim' instead of __print_symbolic. Signed-off-by: Liu Bo Signed-off-by: Josef Bacik Signed-off-by: Chris Mason

btrfs: Use trace condition for get_extent tracepoint

2013-11-21T01:44:47Z

Doing an if statement to test some condition to know if we should trigger a tracepoint is pointless when tracing is disabled. This just adds overhead and wastes a branch prediction. This is why the TRACE_EVENT_CONDITION() was created. It places the check inside the jump label so that the branch does not happen unless tracing is enabled. That is, instead of doing: if (em) trace_btrfs_get_extent(root, em); Which is basically this: if (em) if (static_key(trace_btrfs_get_extent)) { Using a TRACE_EVENT_CONDITION() we can just do: trace_btrfs_get_extent(root, em); And the condition trace event will do: if (static_key(trace_btrfs_get_extent)) { if (em) { ... The static key is a non conditional jump (or nop) that is faster than having to check if em is NULL or not. Signed-off-by: Steven Rostedt Signed-off-by: Josef Bacik Signed-off-by: Chris Mason

btrfs: add lockdep and tracing annotations for uuid tree

2013-09-21T14:58:56Z

Signed-off-by: David Sterba Signed-off-by: Josef Bacik Signed-off-by: Chris Mason

Btrfs/tracepoint: update delayed ref tracepoints

2013-09-01T11:57:39Z

This shows exactly how btrfs processes the delayed refs onto disks, which is very helpful on understanding delayed ref mechanism and debugging related bugs. Signed-off-by: Liu Bo Signed-off-by: Josef Bacik Signed-off-by: Chris Mason

Btrfs: update new flags for tracepoint

2013-06-14T15:30:00Z

Adding new flags to keep tracepoints consistent with btrfs. Signed-off-by: Liu Bo Signed-off-by: Josef Bacik

Btrfs: parse parent 0 into correct value in tracepoint

2012-12-17T01:46:18Z

Value 0 is not a tree id, so besides an upper limit, a lower limit is necessary as well while parsing root types of tracepoint. Signed-off-by: Liu Bo Signed-off-by: Chris Mason

Btrfs: update delayed ref's tracepoints to show sequence

2012-10-01T19:19:17Z

We've added a new field 'sequence' to delayed ref node, so update related tracepoints. Signed-off-by: Liu Bo