16c00db4bb
Pull AFS fixes from David Howells:
"Here's a set of patches that fix a number of bugs in the in-kernel AFS
client, including:
- Fix directory locking to not use individual page locks for
directory reading/scanning but rather to use a semaphore on the
afs_vnode struct as the directory contents must be read in a single
blob and data from different reads must not be mixed as the entire
contents may be shuffled about between reads.
- Fix address list parsing to handle port specifiers correctly.
- Only give up callback records on a server if we actually talked to
that server (we might not be able to access a server).
- Fix some callback handling bugs, including refcounting,
whole-volume callbacks and when callbacks actually get broken in
response to a CB.CallBack op.
- Fix some server/address rotation bugs, including giving up if we
can't probe a server; giving up if a server says it doesn't have a
volume, but there are more servers to try.
- Fix the decoding of fetched statuses to be OpenAFS compatible.
- Fix the handling of server lookups in Cache Manager ops (such as
CB.InitCallBackState3) to use a UUID if possible and to handle no
server being found.
- Fix a bug in server lookup where not all addresses are compared.
- Fix the non-encryption of calls that prevents some servers from
being accessed (this also requires an AF_RXRPC patch that has
already gone in through the net tree).
There's also a patch that adds tracepoints to log Cache Manager ops
that don't find a matching server, either by UUID or by address"
* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix the non-encryption of calls
afs: Fix CB.CallBack handling
afs: Fix whole-volume callback handling
afs: Fix afs_find_server search loop
afs: Fix the handling of an unfound server in CM operations
afs: Add a tracepoint to record callbacks from unlisted servers
afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
afs: Fix VNOVOL handling in address rotation
afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
afs: Fix server rotation's handling of fileserver probe failure
afs: Fix refcounting in callback registration
afs: Fix giving up callbacks on server destruction
afs: Fix address list parsing
afs: Fix directory page locking
88 lines
2.3 KiB
Plaintext
88 lines
2.3 KiB
Plaintext
perf-ftrace(1)
|
|
==============
|
|
|
|
NAME
|
|
----
|
|
perf-ftrace - simple wrapper for kernel's ftrace functionality
|
|
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'perf ftrace' <command>
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
The 'perf ftrace' command is a simple wrapper of kernel's ftrace
|
|
functionality. It only supports single thread tracing currently and
|
|
just reads trace_pipe in text and then write it to stdout.
|
|
|
|
The following options apply to perf ftrace.
|
|
|
|
OPTIONS
|
|
-------
|
|
|
|
-t::
|
|
--tracer=::
|
|
Tracer to use: function_graph or function.
|
|
|
|
-v::
|
|
--verbose=::
|
|
Verbosity level.
|
|
|
|
-p::
|
|
--pid=::
|
|
Trace on existing process id (comma separated list).
|
|
|
|
-a::
|
|
--all-cpus::
|
|
Force system-wide collection. Scripts run without a <command>
|
|
normally use -a by default, while scripts run with a <command>
|
|
normally don't - this option allows the latter to be run in
|
|
system-wide mode.
|
|
|
|
-C::
|
|
--cpu=::
|
|
Only trace for the list of CPUs provided. Multiple CPUs can
|
|
be provided as a comma separated list with no space like: 0,1.
|
|
Ranges of CPUs are specified with -: 0-2.
|
|
Default is to trace on all online CPUs.
|
|
|
|
-T::
|
|
--trace-funcs=::
|
|
Only trace functions given by the argument. Multiple functions
|
|
can be given by using this option more than once. The function
|
|
argument also can be a glob pattern. It will be passed to
|
|
'set_ftrace_filter' in tracefs.
|
|
|
|
-N::
|
|
--notrace-funcs=::
|
|
Do not trace functions given by the argument. Like -T option,
|
|
this can be used more than once to specify multiple functions
|
|
(or glob patterns). It will be passed to 'set_ftrace_notrace'
|
|
in tracefs.
|
|
|
|
-G::
|
|
--graph-funcs=::
|
|
Set graph filter on the given function (or a glob pattern).
|
|
This is useful for the function_graph tracer only and enables
|
|
tracing for functions executed from the given function.
|
|
This can be used more than once to specify multiple functions.
|
|
It will be passed to 'set_graph_function' in tracefs.
|
|
|
|
-g::
|
|
--nograph-funcs=::
|
|
Set graph notrace filter on the given function (or a glob pattern).
|
|
Like -G option, this is useful for the function_graph tracer only
|
|
and disables tracing for function executed from the given function.
|
|
This can be used more than once to specify multiple functions.
|
|
It will be passed to 'set_graph_notrace' in tracefs.
|
|
|
|
-D::
|
|
--graph-depth=::
|
|
Set max depth for function graph tracer to follow
|
|
|
|
SEE ALSO
|
|
--------
|
|
linkperf:perf-record[1], linkperf:perf-trace[1]
|