From 872c8ee8f0f47222f7b10da96eea84d0486540a3 Mon Sep 17 00:00:00 2001 From: Alexey Budankov Date: Tue, 9 Jul 2019 17:48:14 +0300 Subject: perf session: Fix loading of compressed data split across adjacent records Fix decompression failure found during the loading of compressed trace collected on larger scale systems (>48 cores). The error happened due to lack of decompression space for a mmaped buffer data chunk split across adjacent PERF_RECORD_COMPRESSED records. $ perf report -i bt.16384.data --stats failed to decompress (B): 63869 -> 0 : Destination buffer is too small user stack dump failure Can't parse sample, err = -14 0x2637e436 [0x4080]: failed to process type: 9 Error: failed to process sample $ perf test 71 71: Zstd perf.data compression/decompression : Ok Signed-off-by: Alexey Budankov Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Andi Kleen Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/4d839e1b-9c48-89c4-9702-a12217420611@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/session.h | 1 + 1 file changed, 1 insertion(+) (limited to 'tools/perf/util/session.h') diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index dd8920b745bc..863dbad87849 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -46,6 +46,7 @@ struct perf_session { struct decomp { struct decomp *next; u64 file_pos; + size_t mmap_len; u64 head; size_t size; char data[]; -- cgit v1.2.3-59-g8ed1b