perf mmap: Map data buffer for preserving collected data
The map->data buffer is used to preserve map->base profiling data for writing to disk. AIO map->cblock is used to queue corresponding map->data buffer for asynchronous writing. Signed-off-by: NAlexey Budankov <alexey.budankov@linux.intel.com> Reviewed-by: NJiri Olsa <jolsa@redhat.com> Acked-by: NNamhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/5fcda10c-6c63-68df-383a-c6d9e5d1f918@linux.intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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