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authorFrederic Weisbecker <fweisbec@gmail.com>2010-03-03 01:38:37 -0500
committerFrederic Weisbecker <fweisbec@gmail.com>2010-03-10 08:26:40 -0500
commit61e67fb9d3ed13e6a7f58652ae4979b9c872fa57 (patch)
treebccc09f36185b7aac11f11c64cff5d6f8b38cdae /arch/x86
parentdb2c4c7791cd04512093d05afc693c3511a65fd7 (diff)
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@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/dumpstack_64.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index d5e2a2ebb627..272c9f1f05f3 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,
208 if (in_irq_stack(stack, irq_stack, irq_stack_end)) { 208 if (in_irq_stack(stack, irq_stack, irq_stack_end)) {
209 if (ops->stack(data, "IRQ") < 0) 209 if (ops->stack(data, "IRQ") < 0)
210 break; 210 break;
211 bp = print_context_stack(tinfo, stack, bp, 211 bp = ops->walk_stack(tinfo, stack, bp,
212 ops, data, irq_stack_end, &graph); 212 ops, data, irq_stack_end, &graph);
213 /* 213 /*
214 * We link to the next stack (which would be 214 * We link to the next stack (which would be
@@ -229,7 +229,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
229 /* 229 /*
230 * This handles the process stack: 230 * This handles the process stack:
231 */ 231 */
232 bp = print_context_stack(tinfo, stack, bp, ops, data, NULL, &graph); 232 bp = ops->walk_stack(tinfo, stack, bp, ops, data, NULL, &graph);
233 put_cpu(); 233 put_cpu();
234} 234}
235EXPORT_SYMBOL(dump_trace); 235EXPORT_SYMBOL(dump_trace);