Re: [PATCH] perf timechart: Fix SIBGUS error on sparc64

[David Ahern]

On 3/24/15 3:15 PM, Arnaldo Carvalho de Melo wrote:
> /me scratches head, should be missing something embarassingly simple :-/

ptr = sample->raw_data + field->offset;

raw_data is *guaranteed* to be misaligned. From kernel/events/core.c:

                        struct {
                                u32     size;
                                u32     data;
                        } raw = {
                                .size = sizeof(u32),
                                .data = 0,
                        };

Raw data starts at 64-bit alignment, but that u32 means data is NOT 
8-byte aligned. :-(

David

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