Re: [PATCH] perf session: Fix infinite loop on invalid perf.datafile

From: David Ahern
Date: Mon Sep 30 2013 - 09:50:15 EST

On 9/30/13 2:19 AM, Namhyung Kim wrote:
From: Namhyung Kim <>

perf-record updates the header in the file at termination.
Without this update perf-report (and other processing built-ins) it
caused an infinite loop when perf report (or something like) called.

This is because the algorithm in __perf_session__process_events()
depends on the data_size which is read from file header. Use file
size directly instead in this case to do the best-effort processing.

Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Sonny Rao <sonnyrao@xxxxxxxxxxxx>
Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>

worked ok for me. Sonny can you verify?


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