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perf/urgent fixes:

Browse Source 
- Update kernel ABI headers, one of them lead to a small change in
   the ioctl 'cmd' beautifier in 'perf trace' to support the new ISO7816
   commands. (Arnaldo Carvalho de Melo)
 
 - Restore proper cwd on return from mnt namespace (Jiri Olsa)
 
 - Add feature check for the get_current_dir_name() function used in the
   namespace fix from Jiri, that is not available in systems such as
   Alpine Linux, which uses the  musl libc (Arnaldo Carvalho de Melo)
 
 - Fix crash in 'perf record' when synthesizing the unit for events such
   as 'cpu-clock' (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo-4.20-20181121' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes:

- Update kernel ABI headers, one of them lead to a small change in
  the ioctl 'cmd' beautifier in 'perf trace' to support the new ISO7816
  commands. (Arnaldo Carvalho de Melo)

- Restore proper cwd on return from mnt namespace (Jiri Olsa)

- Add feature check for the get_current_dir_name() function used in the
  namespace fix from Jiri, that is not available in systems such as
  Alpine Linux, which uses the  musl libc (Arnaldo Carvalho de Melo)

- Fix crash in 'perf record' when synthesizing the unit for events such
  as 'cpu-clock' (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2018-11-21 15:57:21 +01:00
commit b1a9d7b019
16 changed files with 93 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/arch/x86/include/asm/cpufeatures.h
View File

@ -331,6 +331,8 @@
#define X86_FEATURE_LA57 (16*32+16) /* 5-level page tables */
#define X86_FEATURE_RDPID (16*32+22) /* RDPID instruction */
#define X86_FEATURE_CLDEMOTE (16*32+25) /* CLDEMOTE instruction */
#define X86_FEATURE_MOVDIRI (16*32+27) /* MOVDIRI instruction */
#define X86_FEATURE_MOVDIR64B (16*32+28) /* MOVDIR64B instruction */
/* AMD-defined CPU features, CPUID level 0x80000007 (EBX), word 17 */
#define X86_FEATURE_OVERFLOW_RECOV (17*32+ 0) /* MCA overflow recovery support */

1
tools/build/Makefile.feature
View File

@ -33,6 +33,7 @@ FEATURE_TESTS_BASIC := \
dwarf_getlocations \
fortify-source \
sync-compare-and-swap \
get_current_dir_name \
glibc \
gtk2 \
gtk2-infobar \

4
tools/build/feature/Makefile
View File

@ -7,6 +7,7 @@ FILES= \
test-dwarf_getlocations.bin \
test-fortify-source.bin \
test-sync-compare-and-swap.bin \
test-get_current_dir_name.bin \
test-glibc.bin \
test-gtk2.bin \
test-gtk2-infobar.bin \
@ -101,6 +102,9 @@ $(OUTPUT)test-bionic.bin:
$(OUTPUT)test-libelf.bin:
$(BUILD) -lelf
$(OUTPUT)test-get_current_dir_name.bin:
$(BUILD)
$(OUTPUT)test-glibc.bin:
$(BUILD)

5
tools/build/feature/test-all.c
View File

@ -34,6 +34,10 @@
# include "test-libelf-mmap.c"
#undef main
#define main main_test_get_current_dir_name
# include "test-get_current_dir_name.c"
#undef main
#define main main_test_glibc
# include "test-glibc.c"
#undef main
@ -174,6 +178,7 @@ int main(int argc, char *argv[])
main_test_hello();
main_test_libelf();
main_test_libelf_mmap();
main_test_get_current_dir_name();
main_test_glibc();
main_test_dwarf();
main_test_dwarf_getlocations();

10
tools/build/feature/test-get_current_dir_name.c Normal file
View File

@ -0,0 +1,10 @@
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <unistd.h>
#include <stdlib.h>
int main(void)
{
free(get_current_dir_name());
return 0;
}

2
tools/include/uapi/asm-generic/ioctls.h
View File

@ -79,6 +79,8 @@
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IO('T', 0x41) /* Safely open the slave */
#define TIOCGISO7816 _IOR('T', 0x42, struct serial_iso7816)
#define TIOCSISO7816 _IOWR('T', 0x43, struct serial_iso7816)
#define FIONCLEX 0x5450
#define FIOCLEX 0x5451

22
tools/include/uapi/drm/i915_drm.h
View File

@ -529,6 +529,28 @@ typedef struct drm_i915_irq_wait {
*/
#define I915_PARAM_CS_TIMESTAMP_FREQUENCY 51
/*
* Once upon a time we supposed that writes through the GGTT would be
* immediately in physical memory (once flushed out of the CPU path). However,
* on a few different processors and chipsets, this is not necessarily the case
* as the writes appear to be buffered internally. Thus a read of the backing
* storage (physical memory) via a different path (with different physical tags
* to the indirect write via the GGTT) will see stale values from before
* the GGTT write. Inside the kernel, we can for the most part keep track of
* the different read/write domains in use (e.g. set-domain), but the assumption
* of coherency is baked into the ABI, hence reporting its true state in this
* parameter.
*
* Reports true when writes via mmap_gtt are immediately visible following an
* lfence to flush the WCB.
*
* Reports false when writes via mmap_gtt are indeterminately delayed in an in
* internal buffer and are _not_ immediately visible to third parties accessing
* directly via mmap_cpu/mmap_wc. Use of mmap_gtt as part of an IPC
* communications channel when reporting false is strongly disadvised.
*/
#define I915_PARAM_MMAP_GTT_COHERENT 52
typedef struct drm_i915_getparam {
__s32 param;
/*

5
tools/perf/Makefile.config
View File

@ -299,6 +299,11 @@ ifndef NO_BIONIC
endif
endif
ifeq ($(feature-get_current_dir_name), 1)
CFLAGS += -DHAVE_GET_CURRENT_DIR_NAME
endif
ifdef NO_LIBELF
NO_DWARF := 1
NO_DEMANGLE := 1

2
tools/perf/tests/attr/base-record
View File

@ -9,7 +9,7 @@ size=112
config=0
sample_period=*
sample_type=263
read_format=0
read_format=0|4
disabled=1
inherit=1
pinned=0

1
tools/perf/trace/beauty/ioctl.c
View File

@ -31,6 +31,7 @@ static size_t ioctl__scnprintf_tty_cmd(int nr, int dir, char *bf, size_t size)
"TCSETSW2", "TCSETSF2", "TIOCGRS48", "TIOCSRS485", "TIOCGPTN", "TIOCSPTLCK",
"TIOCGDEV", "TCSETX", "TCSETXF", "TCSETXW", "TIOCSIG", "TIOCVHANGUP", "TIOCGPKT",
"TIOCGPTLCK", [_IOC_NR(TIOCGEXCL)] = "TIOCGEXCL", "TIOCGPTPEER",
"TIOCGISO7816", "TIOCSISO7816",
[_IOC_NR(FIONCLEX)] = "FIONCLEX", "FIOCLEX", "FIOASYNC", "TIOCSERCONFIG",
"TIOCSERGWILD", "TIOCSERSWILD", "TIOCGLCKTRMIOS", "TIOCSLCKTRMIOS",
"TIOCSERGSTRUCT", "TIOCSERGETLSR", "TIOCSERGETMULTI", "TIOCSERSETMULTI",

1
tools/perf/util/Build
View File

@ -10,6 +10,7 @@ libperf-y += evlist.o
libperf-y += evsel.o
libperf-y += evsel_fprintf.o
libperf-y += find_bit.o
libperf-y += get_current_dir_name.o
libperf-y += kallsyms.o
libperf-y += levenshtein.o
libperf-y += llvm-utils.o

2
tools/perf/util/evsel.c
View File

@ -1092,7 +1092,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
attr->exclude_user = 1;
}
if (evsel->own_cpus)
if (evsel->own_cpus || evsel->unit)
evsel->attr.read_format |= PERF_FORMAT_ID;
/*

18
tools/perf/util/get_current_dir_name.c Normal file
View File

@ -0,0 +1,18 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
//
#ifndef HAVE_GET_CURRENT_DIR_NAME
#include "util.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdlib.h>
/* Android's 'bionic' library, for one, doesn't have this */
char *get_current_dir_name(void)
{
char pwd[PATH_MAX];
return getcwd(pwd, sizeof(pwd)) == NULL ? NULL : strdup(pwd);
}
#endif // HAVE_GET_CURRENT_DIR_NAME

17
tools/perf/util/namespaces.c
View File

@ -18,6 +18,7 @@
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <asm/bug.h>
struct namespaces *namespaces__new(struct namespaces_event *event)
{
@ -186,6 +187,7 @@ void nsinfo__mountns_enter(struct nsinfo *nsi,
char curpath[PATH_MAX];
int oldns = -1;
int newns = -1;
char *oldcwd = NULL;
if (nc == NULL)
return;
@ -199,9 +201,13 @@ void nsinfo__mountns_enter(struct nsinfo *nsi,
if (snprintf(curpath, PATH_MAX, "/proc/self/ns/mnt") >= PATH_MAX)
return;
oldcwd = get_current_dir_name();
if (!oldcwd)
return;
oldns = open(curpath, O_RDONLY);
if (oldns < 0)
return;
goto errout;
newns = open(nsi->mntns_path, O_RDONLY);
if (newns < 0)
@ -210,11 +216,13 @@ void nsinfo__mountns_enter(struct nsinfo *nsi,
if (setns(newns, CLONE_NEWNS) < 0)
goto errout;
nc->oldcwd = oldcwd;
nc->oldns = oldns;
nc->newns = newns;
return;
errout:
free(oldcwd);
if (oldns > -1)
close(oldns);
if (newns > -1)
@ -223,11 +231,16 @@ errout:
void nsinfo__mountns_exit(struct nscookie *nc)
{
if (nc == NULL || nc->oldns == -1 || nc->newns == -1)
if (nc == NULL || nc->oldns == -1 || nc->newns == -1 || !nc->oldcwd)
return;
setns(nc->oldns, CLONE_NEWNS);
if (nc->oldcwd) {
WARN_ON_ONCE(chdir(nc->oldcwd));
zfree(&nc->oldcwd);
}
if (nc->oldns > -1) {
close(nc->oldns);
nc->oldns = -1;

1
tools/perf/util/namespaces.h
View File

@ -38,6 +38,7 @@ struct nsinfo {
struct nscookie {
int oldns;
int newns;
char *oldcwd;
};
int nsinfo__init(struct nsinfo *nsi);

4
tools/perf/util/util.h
View File

@ -59,6 +59,10 @@ int fetch_kernel_version(unsigned int *puint,
const char *perf_tip(const char *dirpath);
#ifndef HAVE_GET_CURRENT_DIR_NAME
char *get_current_dir_name(void);
#endif
#ifndef HAVE_SCHED_GETCPU_SUPPORT
int sched_getcpu(void);
#endif