Commit-ID: 61e67fb9d3ed13e6a7f58652ae4979b9c872fa57
Gitweb: http://git.kernel.org/tip/61e67fb9d3ed13e6a7f58652ae4979b9c872fa57
Author: Frederic Weisbecker <fweisbec@xxxxxxxxx>
AuthorDate: Wed, 3 Mar 2010 07:38:37 +0100
Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx>
CommitDate: Wed, 10 Mar 2010 14:26:40 +0100
perf/x86-64: Use frame pointer to walk on irq and process stacks
We were using the frame pointer based stack walker on every
contexts in x86-32, but not in x86-64 where we only use the
seven-league boots on the exception stacks.
Use it also on irq and process stacks. This utterly accelerate
the captures.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
arch/x86/kernel/dumpstack_64.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index d5e2a2e..272c9f1 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -208,7 +208,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
if (in_irq_stack(stack, irq_stack, irq_stack_end)) {
if (ops->stack(data, "IRQ") < 0)
break;
- bp = print_context_stack(tinfo, stack, bp,
+ bp = ops->walk_stack(tinfo, stack, bp,
ops, data, irq_stack_end, &graph);
/*
* We link to the next stack (which would be
@@ -229,7 +229,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
/*
* This handles the process stack:
*/
- bp = print_context_stack(tinfo, stack, bp, ops, data, NULL, &graph);
+ bp = ops->walk_stack(tinfo, stack, bp, ops, data, NULL, &graph);
put_cpu();
}
EXPORT_SYMBOL(dump_trace);
--
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