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  1. 29 3月, 2012 4 次提交
  3. 24 3月, 2012 1 次提交
  5. 21 3月, 2012 5 次提交
    • S
      ktest: Allow a test to override REBOOT_ON_SUCCESS · 648a182c
      由 Steven Rostedt 提交于 
      The option REBOOT_ON_SUCCESS is global, and will have the machine reboot
the the box if all tests are successful. But a test may not want the
machine to reboot, and perhaps have the kernel it loaded be used to
install the next kernel. Or the last test may set up a kernel that the
user may want to look at. In this case, the user could have the global
option REBOOT_ON_SUCCESS be true, but if a test is defined to run at the
end, that test can override the global option and keep the kernel it
installed for the user to log in with.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      648a182c
    • S
      ktest: Fix SWITCH_TO_GOOD to also reboot the machine · 769df641
      由 Steven Rostedt 提交于 
      When the option SWITCH_TO_GOOD is set, it will be called when the system
needs to reboot to the good server. But currently, this keeps the reboot
from happening. The SWITCH_TO_GOOD is just a way to get to a new kernel,
it may not mean to not reboot.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      769df641
    • S
      ktest: Add SCP_TO_TARGET_INSTALL option · 02ad2617
      由 Steven Rostedt 提交于 
      Currently the option used to scp both the modules to the target as well
as the kernel image are the same (SCP_TO_TARGET). But some embedded
boards may require them to be different. The modules may need to be put
directly on the board, but the kernel image may need to go to a
tftpserver.

Add the option SCP_TO_TARGET_INSTALL that will allow the user to change
the config so that they may have the modules and image got to different
machines.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      02ad2617
    • S
      ktest: Add warning when bugs are ignored · 6ca996cc
      由 Steven Rostedt 提交于 
      When IGNORE_ERRORS is set, ktest will not fail a test if a backtrace
is detected. But this can be an issue if the user added it in the
config but forgot to remove it. They may be left wondering why their
test did not fail, or even worse, why their bisect gave the wrong
commit.

Add a warning in the output if IGNORE_WARNINGS is set, and ktest detects
a kernel error.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      6ca996cc
    • S
      ktest: Add INSTALL_MOD_STRIP=1 when installing modules · 627977d8
      由 Steven Rostedt 提交于 
      To keep the modules from bloating the target's filesystem
strip them during the install.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
      627977d8
  7. 17 3月, 2012 3 次提交
  9. 14 3月, 2012 5 次提交
    • I
      perf tools, x86: Build perf on older user-space as well · eae7a755
      由 Ingo Molnar 提交于 
      On ancient systems I get this build failure:

  util/../../../arch/x86/include/asm/unistd.h:67:29: error: asm/unistd_64.h: No such file or directory
  In file included from util/cache.h:7,
                   from builtin-test.c:8:
  util/../perf.h: In function ‘sys_perf_event_open’:In file included from util/../perf.h:16
  perf.h:170: error: ‘__NR_perf_event_open’ undeclared (first use in this function)

The reason is that this old system does not have the split
unistd.h headers yet, from which to pick up the syscall
definitions.

Add the syscall numbers to the already existing i386 and x86_64
blocks in perf.h, and also provide empty include file stubs.

With this patch perf builds and works fine on 5 years old
user-space as well.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/n/tip-jctwg64le1w47tuaoeyftsg9@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      eae7a755
    • A
      perf tools: Use scnprintf where applicable · e7f01d1e
      由 Arnaldo Carvalho de Melo 提交于 
      Several places were expecting that the value returned was the number of
characters printed, not what would be printed if there was space.

Fix it by using the scnprintf and vscnprintf variants we inherited from
the kernel sources.

Some corner cases where the number of printed characters were not
accounted were fixed too.
Reported-by: NAnton Blanchard <anton@samba.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/n/tip-kwxo2eh29cxmd8ilixi2005x@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      e7f01d1e
    • A
      perf tools: Incorrect use of snprintf results in SEGV · b832796c
      由 Anton Blanchard 提交于 
      I have a workload where perf top scribbles over the stack and we SEGV.
What makes it interesting is that an snprintf is causing this.

The workload is a c++ gem that has method names over 3000 characters
long, but snprintf is designed to avoid overrunning buffers. So what
went wrong?

The problem is we assume snprintf returns the number of characters
written:

    ret += repsep_snprintf(bf + ret, size - ret, "[%c] ", self->level);
...
    ret += repsep_snprintf(bf + ret, size - ret, "%s", self->ms.sym->name);

Unfortunately this is not how snprintf works. snprintf returns the
number of characters that would have been written if there was enough
space. In the above case, if the first snprintf returns a value larger
than size, we pass a negative size into the second snprintf and happily
scribble over the stack. If you have 3000 character c++ methods thats a
lot of stack to trample.

This patch fixes repsep_snprintf by clamping the value at size - 1 which
is the maximum snprintf can write before adding the NULL terminator.

I get the sinking feeling that there are a lot of other uses of snprintf
that have this same bug, we should audit them all.

Cc: David Ahern <dsahern@gmail.com>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Cc: stable@kernel.org
Link: http://lkml.kernel.org/r/20120307114249.44275ca3@krytenSigned-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      b832796c
    • K
      Drivers: hv: Add new message types to enhance KVP · e485ceac
      由 K. Y. Srinivasan 提交于 
      Add additional KVP (Key Value Pair) protocol  messages to
enhance KVP functionality for Linux guests on Hyper-V. As part of this,
patch define an explicit version negoitiation message.
Reviewed-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      e485ceac
    • S
      perf record: Fix buffer overrun bug in tracepoint_id_to_path() · 8aa8a7c8
      由 Stephane Eranian 提交于 
      This patch fixes a buffer overrun bug in
tracepoint_id_to_path(). The bug manisfested itself as a memory
error reported by perf record. I ran into it with perf sched:

 $ perf sched rec noploop 2 noploop for 2 seconds
 [ perf record: Woken up 14 times to write data ]
 [ perf record: Captured and wrote 42.701 MB perf.data (~1865622 samples) ]
 Fatal: No memory to alloc tracepoints list

It turned out that tracepoint_id_to_path() was reading the
tracepoint id using read() but the buffer was not large enough
to include the \n terminator for id with 4 digits or more.

The patch fixes the problem by extending the buffer to a more
reasonable size covering all possible id length include \n
terminator. Note that atoll() stops at the first non digit
character, thus it is not necessary to clear the buffer between
each read.
Signed-off-by: NStephane Eranian <eranian@google.com>
Acked-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: fweisbec@gmail.com
Cc: dsahern@gmail.com
Link: http://lkml.kernel.org/r/20120313155102.GA6465@quadSigned-off-by: NIngo Molnar <mingo@elte.hu>
      8aa8a7c8
  11. 13 3月, 2012 2 次提交
  13. 09 3月, 2012 10 次提交
  15. 05 3月, 2012 7 次提交
  17. 03 3月, 2012 3 次提交