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Andrey Ryabinin 0a373d4fc2 x86/unwinder/guess: Prevent using CONFIG_UNWINDER_GUESS=y with CONFIG_STACKDEPOT=y 
Stackdepot doesn't work well with CONFIG_UNWINDER_GUESS=y.
The 'guess' unwinder generate awfully large and inaccurate stacktraces,
thus stackdepot can't deduplicate stacktraces because they all look like
unique. Eventually stackdepot reaches its capacity limit:

  WARNING: CPU: 0 PID: 545 at lib/stackdepot.c:119 depot_save_stack+0x28e/0x550
  Call Trace:
   ? kasan_kmalloc+0x144/0x160
   ? depot_save_stack+0x1f5/0x550
   ? do_raw_spin_unlock+0xda/0xf0
   ? preempt_count_sub+0x13/0xc0

  <...90 lines...>

   ? do_raw_spin_unlock+0xda/0xf0

Add a STACKDEPOT=n dependency to UNWINDER_GUESS to avoid the problem.

Reported-by: kernel test robot <xiaolong.ye@intel.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171130123554.4330-1-aryabinin@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-11 19:07:07 +01:00
..
boot
x86/build: Don't verify mtools configuration file for isoimage
2017-12-11 18:55:38 +01:00
configs
x86/unwind: Rename unwinder config options to 'CONFIG_UNWINDER_*'
2017-10-14 10:12:12 +02:00
crypto
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2017-11-06 09:05:03 -08:00
entry
x86/vdso: Change time() prototype to match __vdso_time()
2017-12-06 21:31:46 +01:00
events
perf/x86/intel/uncore: Cache logical pkg id in uncore driver
2017-11-17 16:22:30 +01:00
hyperv
x86/virt: Add enum for hypervisors to replace x86_hyper
2017-11-10 10:03:12 +01:00
ia32
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
include
x86/cpufeatures: Make X86_BUG_FXSAVE_LEAK detectable in CPUID on AMD
2017-12-06 12:27:13 +01:00
kernel
x86/smpboot: Do not use smp_num_siblings in __max_logical_packages calculation
2017-12-07 10:28:22 +01:00
kvm
Merge branch 'linus' into locking/core, to resolve conflicts
2017-11-07 10:32:44 +01:00
lib
x86/decoder: Add new TEST instruction pattern
2017-11-24 08:36:12 +01:00
math-emu
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mm
x86/mm/kmmio: Fix mmiotrace for page unaligned addresses
2017-12-11 15:35:18 +01:00
net
bpf: fix bpf_tail_call() x64 JIT
2017-10-03 16:04:44 -07:00
oprofile
x86/oprofile/ppro: Do not use __this_cpu*() in preemptible context
2017-11-08 13:01:54 +01:00
pci
x86/PCI: Make broadcom_postcore_init() check acpi_disabled
2017-12-06 12:27:47 +01:00
platform
x86: Fix Sparse warnings about non-static functions
2017-12-06 19:32:58 +01:00
power
x86/power: Fix some ordering bugs in __restore_processor_context()
2017-12-06 12:29:12 +01:00
purgatory
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ras
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
realmode
x86/realmode: Don't decrypt trampoline area under SEV
2017-11-07 15:35:55 +01:00
tools
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
um
Merge branch 'linus' into x86/asm, to pick up fixes and resolve conflicts
2017-11-07 10:53:06 +01:00
video
…
xen
x86/xen: Support early interrupts in xen pv guests
2017-11-28 00:28:56 +01:00
.gitignore
…
Kbuild
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-07 09:25:15 -07:00
Kconfig
x86/mm/kasan: Don't use vmemmap_populate() to initialize shadow
2017-11-22 07:18:35 +01:00
Kconfig.cpu
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Kconfig.debug
x86/unwinder/guess: Prevent using CONFIG_UNWINDER_GUESS=y with CONFIG_STACKDEPOT=y
2017-12-11 19:07:07 +01:00
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Makefile_32.cpu
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Makefile.um
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00