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    perf events, x86/stacktrace: Make stack walking optional · 61c1917f
    Frederic Weisbecker 提交于
    The current print_context_stack helper that does the stack
    walking job is good for usual stacktraces as it walks through
    all the stack and reports even addresses that look unreliable,
    which is nice when we don't have frame pointers for example.
    
    But we have users like perf that only require reliable
    stacktraces, and those may want a more adapted stack walker, so
    lets make this function a callback in stacktrace_ops that users
    can tune for their needs.
    Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Paul Mackerras <paulus@samba.org>
    LKML-Reference: <1261024834-5336-1-git-send-regression-fweisbec@gmail.com>
    Signed-off-by: NIngo Molnar <mingo@elte.hu>
    61c1917f
perf_event.c 56.5 KB