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authorSteven Rostedt <srostedt@redhat.com>2009-03-25 14:30:04 -0400
committerIngo Molnar <mingo@elte.hu>2009-04-10 12:50:58 +0200
commite71e99c294058a61b7a8b9bb6da2f745ac51aa4f (patch)
tree726e084c7d09043db04d9e3c7de16f2f94600b8e /include
parent2062501ae6505dbc5bff3a792246c2661d114050 (diff)
x86, function-graph: only save return values on x86_64
Impact: speed up The return to handler portion of the function graph tracer should only need to save the return values. The caller already saved off the registers that the callee can modify. The returning function already saved the registers it modified. When we call our own trace function it too will save the registers that the callee must restore. There's no reason to save off anything more that the registers used to return the values. Note, I did a complete kernel build with this modification and the function graph tracer running on x86_64. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions

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