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The ftrace_disable_cpu() and ftrace_enable_cpu() functions were
needed back before the ring buffer was lockless. Now that the
ring buffer is lockless (and has been for some time), these functions
serve no purpose, and unnecessarily slow down operations of the tracer.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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It's appropriate to use __seq_open_private interface to open
some of trace seq files, because it covers all steps we are
duplicating in tracing code - zallocating the iterator and
setting it as seq_file's private.
Using this for following files:
trace
available_filter_functions
enabled_functions
Link: http://lkml.kernel.org/r/1335342219-2782-5-git-send-email-jolsa@redhat.com
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
[
Fixed warnings for:
kernel/trace/trace.c: In function '__tracing_open':
kernel/trace/trace.c:2418:11: warning: unused variable 'ret' [-Wunused-variable]
kernel/trace/trace.c:2417:19: warning: unused variable 'm' [-Wunused-variable]
]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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This fixes spending time for evaluating parameters in trace_preempt_on/off when
the tracer config is off.
The patch mainly inspired by Steven Rostedt, thanks Steven.
Link: http://lkml.kernel.org/r/4FA73510.7070705@samsung.com
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Turner <pjt@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Minho Ban <mhban@samsung.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core
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If CONFIG_KPROBES is not set, then linux/kprobes.h will not include
asm/kprobes.h needed by x86/ftrace.c for the BREAKPOINT macro.
The x86/ftrace.c file should just include asm/kprobes.h as it does not
need the rest of kprobes.
Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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As ftrace function tracing would require modifying code that could
be executed in NMI context, which is not stopped with stop_machine(),
ftrace had to do a complex algorithm with various stages of setup
and memory barriers to make it work.
With the new breakpoint method, this is no longer required. The changes
to the code can be done without any problem in NMI context, as well as
without stop machine altogether. Remove the complex code as it is
no longer needed.
Also, a lot of the notrace annotations could be removed from the
NMI code as it is now safe to trace them. With the exception of
do_nmi itself, which does some special work to handle running in
the debug stack. The breakpoint method can cause NMIs to double
nest the debug stack if it's not setup properly, and that is done
in do_nmi(), thus that function must not be traced.
(Note the arch sh may want to do the same)
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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This method changes x86 to add a breakpoint to the mcount locations
instead of calling stop machine.
Now that iret can be handled by NMIs, we perform the following to
update code:
1) Add a breakpoint to all locations that will be modified
2) Sync all cores
3) Update all locations to be either a nop or call (except breakpoint
op)
4) Sync all cores
5) Remove the breakpoint with the new code.
6) Sync all cores
[
Added updates that Masami suggested:
Use unlikely(modifying_ftrace_code) in int3 trap to keep kprobes efficient.
Don't use NOTIFY_* in ftrace handler in int3 as it is not a notifier.
]
Cc: H. Peter Anvin <hpa@zytor.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Add a debugfs entry under per_cpu/ folder for each cpu called
buffer_size_kb to control the ring buffer size for each CPU
independently.
If the global file buffer_size_kb is used to set size, the individual
ring buffers will be adjusted to the given size. The buffer_size_kb will
report the common size to maintain backward compatibility.
If the buffer_size_kb file under the per_cpu/ directory is used to
change buffer size for a specific CPU, only the size of the respective
ring buffer is updated. When tracing/buffer_size_kb is read, it reports
'X' to indicate that sizes of per_cpu ring buffers are not equivalent.
Link: http://lkml.kernel.org/r/1328212844-11889-1-git-send-email-vnagarnaik@google.com
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Michael Rubin <mrubin@google.com>
Cc: David Sharp <dhsharp@google.com>
Cc: Justin Teravest <teravest@google.com>
Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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memcpy() returns a pointer to "bug". Hopefully, it's not NULL here or
we would already have Oopsed.
Link: http://lkml.kernel.org/r/20120420063145.GA22649@elgon.mountain
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Currently, trace_printk() uses a single buffer to write into
to calculate the size and format needed to save the trace. To
do this safely in an SMP environment, a spin_lock() is taken
to only allow one writer at a time to the buffer. But this could
also affect what is being traced, and add synchronization that
would not be there otherwise.
Ideally, using percpu buffers would be useful, but since trace_printk()
is only used in development, having per cpu buffers for something
never used is a waste of space. Thus, the use of the trace_bprintk()
format section is changed to be used for static fmts as well as dynamic ones.
Then at boot up, we can check if the section that holds the trace_printk
formats is non-empty, and if it does contain something, then we
know a trace_printk() has been added to the kernel. At this time
the trace_printk per cpu buffers are allocated. A check is also
done at module load time in case a module is added that contains a
trace_printk().
Once the buffers are allocated, they are never freed. If you use
a trace_printk() then you should know what you are doing.
A buffer is made for each type of context:
normal
softirq
irq
nmi
The context is checked and the appropriate buffer is used.
This allows for totally lockless usage of trace_printk(),
and they no longer even disable interrupts.
Requested-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Annotation improvements:
Now the default annotate browser uses a much more compact format, implementing
suggestions made made by several people, notably Linus.
Here is part of the new __list_del_entry() annotation:
__list_del_entry
8.47 │ push %rbp
8.47 │ mov (%rdi),%rdx
20.34 │ mov $0xdead000000100100,%rcx
3.39 │ mov 0x8(%rdi),%rax
0.00 │ mov %rsp,%rbp
1.69 │ cmp %rcx,%rdx
0.00 │ je 43
1.69 │ mov $0xdead000000200200,%rcx
3.39 │ cmp %rcx,%rax
0.00 │ je a3
5.08 │ mov (%rax),%r8
18.64 │ cmp %r8,%rdi
0.00 │ jne 84
1.69 │ mov 0x8(%rdx),%r8
25.42 │ cmp %r8,%rdi
0.00 │ jne 65
1.69 │ mov %rax,0x8(%rdx)
0.00 │ mov %rdx,(%rax)
0.00 │ leaveq
0.00 │ retq
0.00 │ 43: mov %rdx,%r8
0.00 │ mov %rdi,%rcx
0.00 │ mov $0xffffffff817cd6a8,%rdx
0.00 │ mov $0x31,%esi
0.00 │ mov $0xffffffff817cd6e0,%rdi
0.00 │ xor %eax,%eax
0.00 │ callq ffffffff8104eab0 <warn_slowpath_fmt>
0.00 │ leaveq
0.00 │ retq
0.00 │ 65: mov %rdi,%rcx
0.00 │ mov $0xffffffff817cd780,%rdx
0.00 │ mov $0x3a,%esi
0.00 │ mov $0xffffffff817cd6e0,%rdi
0.00 │ xor %eax,%eax
0.00 │ callq ffffffff8104eab0 <warn_slowpath_fmt>
0.00 │ leaveq
0.00 │ retq
The infrastructure is there to provide formatters for any instruction,
like the one I'll do for call functions to elide the address.
Further fixes on top of the first iteration:
- Sometimes a jump points to an offset with no instructions, make the
mark jump targets function handle that, for now just ignoring such
jump targets, more investigation is needed to figure out how to cope
with that.
- Handle jump targets that are outside the function, for now just don't
try to draw the connector arrow, right thing seems to be to mark this
jump with a -> (right arrow) and handle it like a callq.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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As described in the previous patch. Next step is to properly label those
jumps by using a -> arrow, i.e. not backwards/forwards, and allow the
user to navigate to this other function when enter or -> is pressed.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ax2sss463eu88wgl9ee8a6b6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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I.e. jumps that go to code outside the current function, that is denoted
in objdump -dS as:
399f877a9f: jne 399f87bcf4 <_L_lock_5154>
I.e. without the + after the name of the current function, like in:
399f877aa5: jmp 399f877ab2 <_int_free+0x412>
The browser will use that info to avoid drawing connectors to the start
of the function, since ops.target.addr was zero.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-xrn35g2mlawz1ydo1p73w3q6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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We were using ins_ops->target for callq addresses and jump offsets,
disambiguate by having ins_ops->target.addr and ins_ops->target.offset.
For jumps we'll need both to fixup lines that don't have an offset on
the <> part.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-3nlcmstua75u07ao7wja1rwx@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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In annotate_browser__mark_jump_targets
702 dlt = browser->offsets[dl->ops.target];
703 bdlt = disasm_line__browser(dlt);
704 bdlt->jump_target = true;
705 }
706
707 }
(gdb) p size
$5 = 2415
(gdb) p offset
$6 = 140
(gdb) p dl->ops.target
$7 = 143
(gdb) p browser->offsets[143]
$8 = (struct disasm_line *) 0x0
(gdb) p dl->name
$9 = 0x2363bd0 "je"
(gdb)
Really strange, the code assumed that at the jump target we would have
an assembly line, but only in the previous instruction offset we have a
'lock':
(gdb) p browser->offsets[144]
$10 = (struct disasm_line *) 0x0
(gdb) p browser->offsets[142]
$11 = (struct disasm_line *) 0x27bd620
(gdb) p browser->offsets[142]->name
$12 = 0x237a8a0 "lock"
(gdb)
I'll study this more, but for now I'll just check if there is a
disasm_line at dl->ops.target, i.e. a valid jump target.
Reported-by: Hagen Paul Pfeifer <hagen@jauu.net>
Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-inzjrzyqhkzyv78met2vula6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Simple algorithm, just look for the next backward jump that points to
before the cursor.
Then draw an arrow connecting the jump to its target.
Do this as you move the cursor, entering/exiting possible loops.
Ex (graph chars replaced to avoid mail encoding woes):
avc_has_perm_flags
0.00 | nopl 0x0(%rax)
5.36 |+-> 68: mov (%rax),%rax
5.15 || test %rax,%rax
0.00 || v je 130
2.96 || 74: cmp -0x20(%rax),%ebx
47.38 || lea -0x20(%rax),%rcx
0.28 || ^ jne 68
3.16 || cmp -0x18(%rax),%dx
0.00 |+------^ jne 68
4.92 | cmp 0x4(%rcx),%r13d
0.00 | v jne 68
1.15 | test %rcx,%rcx
0.00 | v je 130
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-5gairf6or7dazlx3ocxwvftm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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To save typing on the switch char set slang stuff.
It also helps in removing more slang direct calls, wrapping them at the
ui_browser level, where at some point I'll try to implement those in
terms of GTK+.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-63yhb2htv9g3g1olmojzptkd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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By just returning to the previous function being annotated or to the top
main screen when popping out the base of the annotation stack.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-x1dlc4d5aukj72g45o15s75k@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Just use a left arrow prefixing retqs.
Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-tnpfijuomrntbnl5vr6ibdwa@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Using up/down arrows just before the instruction, replacing the actual chars
with approximations to avoid mail encoding snafus:
avtab_search_node
0.00 | push %rbp
0.00 | mov %rsp,%rbp
0.00 | callq mcount
0.00 | movzwl 0x6(%rsi),%edx
0.00 | and $0x7fff,%dx
0.00 | test %rdi,%rdi
0.00 | v jne 20
0.00 | 17: xor %eax,%eax
0.00 | 19: leaveq
0.00 | retq
0.00 | nopl 0x0(%rax,%rax,1)
0.00 | 20: mov (%rdi),%rax
0.00 | test %rax,%rax
0.00 | ^ je 17
0.00 | movzwl (%rsi),%ecx
0.00 | movzwl 0x2(%rsi),%r9d
0.00 | movzwl 0x4(%rsi),%r8d
0.00 | movzwl %cx,%esi
0.00 | movzwl %r9w,%r10d
0.00 | shl $0x9,%esi
0.00 | lea (%rsi,%r10,4),%esi
0.00 | lea (%r8,%rsi,1),%esi
0.00 | and 0x10(%rdi),%si
0.00 | movzwl %si,%esi
0.00 | mov (%rax,%rsi,8),%rax
0.00 | test %rax,%rax
0.00 | ^ je 19
0.00 | nopw 0x0(%rax,%rax,1)
0.00 | 60: cmp %cx,(%rax)
0.00 | v jne 7e
0.00 | cmp %r9w,0x2(%rax)
0.00 | v jne 7e
0.00 | cmp %r8w,0x4(%rax)
0.00 | v jne 79
0.00 | test %dx,0x6(%rax)
0.00 | ^ jne 19
0.00 | 79: cmp %r8w,0x4(%rax)
93.04 | 7e:^ ja 17
2.53 | mov 0x10(%rax),%rax
4.43 | test %rax,%rax
0.00 | ^ jne 60
0.00 | leaveq
0.00 | retq
Next low hanging fruit is to use left arrow for retqs, then work on clearling
marking loops.
Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-hkx848wdbs6n7bcp3ymr9yus@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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0.00 | callq ffffffff8112f190 <__mod_zone_page_state>
Becomes:
0.00 | callq __mod_zone_page_state
But if you press 'o' it gets verbose, i.e. as in objdump -dS:
0.00 | ffffffff8116bdda: callq ffffffff8112f190 <__mod_zone_page_state>
Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-bwse2wib954y0db7dq91bes5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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We need to cope with things like:
$ objdump -d --no-show-raw -S -C /lib/modules/3.4.0-rc2+/build/vmlinux
<SNIP>
ffffffff8125ec60 <copy_user_generic_unrolled>:
* Output:
* eax uncopied bytes or 0 if successful.
*/
ENTRY(copy_user_generic_unrolled)
CFI_STARTPROC
cmpl $8,%edx
ffffffff8125ec60: cmp $0x8,%edx
jb 20f /* less then 8 bytes, go to byte copy loop */
ffffffff8125ec63: jb ffffffff8125ecf5 <copy_user_generic_unrolled+0x95>
ALIGN_DESTINATION
<SNIP>
ffffffff8125ec8d: je ffffffff8125ecd9 <copy_user_generic_unrolled+0x79>
1: movq (%rsi),%r8
ffffffff8125ec8f: mov (%rsi),%r8
2: movq 1*8(%rsi),%r9
ffffffff8125ec92: mov 0x8(%rsi),%r9
3: movq 2*8(%rsi),%r10
ffffffff8125ec96: mov 0x10(%rsi),%r10
4: movq 3*8(%rsi),%r11
<SNIP>
Probably expect that the length of the addr field be the same...
Lazy move for now, back to supporting suppressing the address on callq lines...
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-7hp85vnvowpqj8799f8rxbu1@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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So that the ins_ops can handle them in a single place, instead of adding
more and more functions or ins_ops parameters.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-pk4dqaum6ftiz104dvimwgtb@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Taken from binutils:
[acme@sandy binutils-2.22]$ grep ^j opcodes/i386-opc.tbl | cut -d, -f1 | sort -u
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-mwshob8n12jlsu458ghvheos@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Where we had ':'.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-l8gbejzpglnwiwk43450h31g@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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But now we have a lot of space on the right...
Perhaps we should add a "Trending on G+" gizmo... ;-)
Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-igoynvtg2wc6mdfinc69prp6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Find out at browser startup the max width and use it when rendering jump
labels on the screen.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-7dxjiwqb77wz6f5lc05e0i0x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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This:
0.00 : ffffffff8116bd00: lock btsl $0x0,(%r12)
100.00 : ffffffff8116bd07: sbb %eax,%eax
0.00 : ffffffff8116bd09: test %eax,%eax
0.00 : ffffffff8116bd0b: jne ffffffff8116bf5f <__mem_cgroup_commit_charge+0x28f>
0.00 : ffffffff8116bd11: mov (%r12),%rax
0.00 : ffffffff8116bd15: test $0x2,%al
0.00 : ffffffff8116bd17: jne ffffffff8116bf6e <__mem_cgroup_commit_charge+0x29e>
0.00 : ffffffff8116bd1d: test %r9b,%r9b
0.00 : ffffffff8116bd20: jne ffffffff8116be30 <__mem_cgroup_commit_charge+0x160>
0.00 : ffffffff8116bd26: xor %eax,%eax
0.00 : ffffffff8116bd28: mov %r13,0x8(%r12)
0.00 : ffffffff8116bd2d: lock orb $0x2,(%r12)
0.00 : ffffffff8116bd33: test %r9b,%r9b
0.00 : ffffffff8116bd36: je ffffffff8116bdf3 <__mem_cgroup_commit_charge+0x123>
Becomes:
0.00 : 30: lock btsl $0x0,(%r12)
100.00 : sbb %eax,%eax
0.00 : test %eax,%eax
0.00 : jne 28f
0.00 : mov (%r12),%rax
0.00 : test $0x2,%al
0.00 : jne 29e
0.00 : test %r9b,%r9b
0.00 : jne 160
0.00 : 56: xor %eax,%eax
0.00 : 58: mov %r13,0x8(%r12)
0.00 : lock orb $0x2,(%r12)
0.00 : test %r9b,%r9b
0.00 : je 123
I.e. We trow away all those useless addresses and keep just jump labels.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-r2vmbtgz0l8coluj8flztgrn@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Fixing some off by one cases in the process.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-fxumzufhk829z0q9anmvemea@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Its not just an rb_node, it carries extra state that is private to the
browser. And will carry some more in the next patches.
Better name it browser_disasm_line, i.e. something derived from
disasm_line, that specializes it.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-nev4b97vdvv35we1qmooym52@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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And implement the jump one, where if the operands string is not passed,
a compact form that uses just the target address is used.
Right now this is toggled via the 'o' option in the annotate browser,
switching from:
0.00 : ffffffff811661e8: je ffffffff81166204 <mem_cgroup_count_vm_event+0x44>
0.00 : ffffffff811661ea: cmp $0xb,%esi
0.00 : ffffffff811661ed: je ffffffff811661f8 <mem_cgroup_count_vm_event+0x38>
To:
0.00 : 28: je 44
0.00 : 2a: cmp $0xb,%esi
0.00 : 2d: je 38
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-o88q46yh4kxgpd1chk5gvjl5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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No need to do it everytime the user presses enter/-> on a call
instruction.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ybgss44m5ycry8mk7b1qdbre@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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So that at disassembly time we parse targets, etc.
Supporting jump instructions initially, call functions are next.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-7vzlh66n5or46n27ji658cnl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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No need to reparse it everytime.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-90ncot487p4h5rzkn8h2whou@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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For lines with instructions find the name and operands, breaking those
tokens for consumption by the browser.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-6aazb9f5o3d9zi28e6rruv12@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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We want to move away from using 'objdump -dS' as the only disassembler
supported.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-lsn9pjuxxm5ezsubyhkmprw7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Renaming remaining PERF_COUNTERS options into PERF_EVENTS.
Think we can get rid of PERF_COUNTERS now.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1333643084-26776-5-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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No need to have an additional function layer.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1333643084-26776-4-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Now the return value of cmpxchg() is used to match an event. The
change removes the duplicate event comparison and traverses the list
until an event was removed. This also fixes the following warning:
arch/x86/kernel/cpu/perf_event_amd.c:170: warning: value computed is not used
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1333643084-26776-3-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Removing duplicate code.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1333643084-26776-2-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge v3.4-rc4 - we were on -rc2 before.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Otherwise cpu_active_mask will not set, which lead to other issue.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Signed-off-by: Konrad Eisele <konrad@gaisler.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull "ARM: SoC fixes" from Olof Johansson:
* at91, ux500, imx, omap and bcmring:
- at91 fixes for =m driver build issues, irqdomain fixes and config
dependency fixes
- ux500 kconfig dependency fixes and a smp wakeup bugfix
- imx idle bugfix and build fix due to irq domain changes
- omap uart pinmux fixes, softreset regression revert and misc fixes
- bcmring build error regression fix
* ux500 and imx had some small defconfig updates in this branch
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (27 commits)
ARM: bcmring: fix UART declarations
ARM: imx: Fix imx5 idle logic bug
ARM: imx27-dt: Fix build due to removal of irq_domain_add_simple()
ARM: imx_v4_v5_defconfig: Add support for CONFIG_REGULATOR_FIXED_VOLTAGE
ARM: OMAP1: DMTIMER: fix broken timer clock source selection
ARM: OMAP: serial: Fix the ocp smart idlemode handling bug
ARM: OMAP2+: UART: Fix incorrect population of default uart pads
ARM: OMAP: sram: fix BUG in dpll code for !PM case
dmaengine: Kconfig: fix Atmel at_hdmac entry
USB: gadget/at91_udc: add gpio_to_irq() function to vbus interrupt
USB: ohci-at91: change annotations for probe/remove functions
leds-atmel-pwm.c: Make pwmled_probe() __devinit
ARM: at91: fix at91sam9261ek Ethernet dm9000 irq
ARM: at91: fix rm9200ek flash size
ARM: at91: remove empty at91_init_serial function
ARM: at91: fix typo in at91_pmc_base assembly declaration
ARM: at91: Export at91_matrix_base
ARM: at91: Export at91_pmc_base
ARM: at91: Export at91_ramc_base
ARM: at91: Export at91_st_base
...
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Here is another fixes series for AT91 designed for 3.4-rc.
We experienced some issues while compiling some drivers as modules: Joachim has
corrected several of them. We may reduce this number of exported values by
reworking some drivers, in the future.
Some drivers are also modified here, I would like to keep them in the series
as the modifications are really related with our recent move to irqdomains or
simply related with compiler annotations.
I keep dmaengine Kconfig modification in this "fixes" series. The DMA
driver will not be available for 9x5 SoC family otherwise.
* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
dmaengine: Kconfig: fix Atmel at_hdmac entry
USB: gadget/at91_udc: add gpio_to_irq() function to vbus interrupt
USB: ohci-at91: change annotations for probe/remove functions
leds-atmel-pwm.c: Make pwmled_probe() __devinit
ARM: at91: fix at91sam9261ek Ethernet dm9000 irq
ARM: at91: fix rm9200ek flash size
ARM: at91: remove empty at91_init_serial function
ARM: at91: fix typo in at91_pmc_base assembly declaration
ARM: at91: Export at91_matrix_base
ARM: at91: Export at91_pmc_base
ARM: at91: Export at91_ramc_base
ARM: at91: Export at91_st_base
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Remove SoC dependency and make it generic for every Atmel ARM AT91. That will
allow to select this driver for newer chips. Keep dependency on AT91 because of
the use of an header file located in include/mach directory.
Modify the comment to reflect this.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
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Now that we are using irqdomains, we need to convert GPIO pins to Linux
IRQ numbers using the gpio_to_irq() function.
This call is added to request/free_irq calls.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: linux-usb@vger.kernel.org
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Add __devinit and __devexit on *_probe() and *_remove() functions
with proper modification of struct platform_driver.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org
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Commit 892a884 (leds: convert led platform drivers to module_platform_driver)
is omitting the section mismatch error: so change annotation of the probe
function to __devinit instead of __init.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
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You need to setup the dm9000 irq via gpio_to_irq() since
d0fbda9add (ARM: at91/gpio: drop PIN_BASE).
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: stable <stable@vger.kernel.org> [3.2+]
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