Revision a09935b878dc8efd4b030ed1ffa0553fc9011fb8 authored by Namhyung Kim on 31 May 2017, 12:01:05 UTC, committed by Arnaldo Carvalho de Melo on 05 June 2017, 17:17:59 UTC
The decompress_kmodule() decompresses kernel modules in order to load
symbols from it. In the DSO_BINARY_TYPE__BUILD_ID_CACHE case, it needs
the full file path to extract the file extension to determine the
decompression method. But overwriting 'name' will fail the
decompression since it might point to a non-existing old file.
Instead, use dso->long_name for having the correct extension and use the
real filename to decompress.
In the DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP case, both names should
be the same. This allows resolving symbols in the old modules.
Before:
$ perf report -i perf.data.old | grep scsi_mod
0.00% cc1 [scsi_mod] [k] 0x0000000000004aa6
0.00% as [scsi_mod] [k] 0x00000000000099e1
0.00% cc1 [scsi_mod] [k] 0x0000000000009830
0.00% cc1 [scsi_mod] [k] 0x0000000000001b8f
After:
0.00% cc1 [scsi_mod] [k] scsi_handle_queue_ramp_up
0.00% as [scsi_mod] [k] scsi_sg_alloc
0.00% cc1 [scsi_mod] [k] scsi_setup_cmnd
0.00% cc1 [scsi_mod] [k] scsi_get_command
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170531120105.21731-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1 parent 6b335e8
| File | Mode | Size |
|---|---|---|
| BUGS-parport | -rw-r--r-- | 319 bytes |
| Kconfig | -rw-r--r-- | 5.4 KB |
| Makefile | -rw-r--r-- | 693 bytes |
| TODO-parport | -rw-r--r-- | 594 bytes |
| daisy.c | -rw-r--r-- | 12.3 KB |
| ieee1284.c | -rw-r--r-- | 22.6 KB |
| ieee1284_ops.c | -rw-r--r-- | 23.3 KB |
| multiface.h | -rw-r--r-- | 387 bytes |
| parport_amiga.c | -rw-r--r-- | 6.3 KB |
| parport_atari.c | -rw-r--r-- | 5.4 KB |
| parport_ax88796.c | -rw-r--r-- | 9.3 KB |
| parport_cs.c | -rw-r--r-- | 5.5 KB |
| parport_gsc.c | -rw-r--r-- | 11.0 KB |
| parport_gsc.h | -rw-r--r-- | 6.1 KB |
| parport_ip32.c | -rw-r--r-- | 67.0 KB |
| parport_mfc3.c | -rw-r--r-- | 9.9 KB |
| parport_pc.c | -rw-r--r-- | 85.5 KB |
| parport_serial.c | -rw-r--r-- | 20.1 KB |
| parport_sunbpp.c | -rw-r--r-- | 9.3 KB |
| probe.c | -rw-r--r-- | 7.4 KB |
| procfs.c | -rw-r--r-- | 12.6 KB |
| share.c | -rw-r--r-- | 36.8 KB |
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