forked from luck/tmp_suning_uos_patched
dcc3423c1d
commit b22a8f7b4bde4e4ab73b64908ffd5d90ecdcdbfd upstream.
John Paul reported a warning about bogus NUMA distance values spurred by
commit:
620a6dc40754 ("sched/topology: Make sched_init_numa() use a set for the deduplicating sort")
In this case, the afflicted machine comes up with a reported 256 possible
nodes, all of which are 0 distance away from one another. This was
previously silently ignored, but is now caught by the aforementioned
commit.
The culprit is ia64's node_possible_map which remains unchanged from its
initialization value of NODE_MASK_ALL. In John's case, the machine
doesn't have any SRAT nor SLIT table, but AIUI the possible map remains
untouched regardless of what ACPI tables end up being parsed. Thus,
!online && possible nodes remain with a bogus distance of 0 (distances \in
[0, 9] are "reserved and have no meaning" as per the ACPI spec).
Follow x86 / drivers/base/arch_numa's example and set the possible map to
the parsed map, which in this case seems to be the online map.
Link: http://lore.kernel.org/r/255d6b5d-194e-eb0e-ecdd-97477a534441@physik.fu-berlin.de
Link: https://lkml.kernel.org/r/20210318130617.896309-1-valentin.schneider@arm.com
Fixes: 620a6dc40754 ("sched/topology: Make sched_init_numa() use a set for the deduplicating sort")
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: Sergei Trofimovich <slyfox@gentoo.org>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Anatoly Pugachev <matorola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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| .. | ||
| syscalls | ||
| .gitignore | ||
| acpi-ext.c | ||
| acpi.c | ||
| asm-offsets.c | ||
| audit.c | ||
| brl_emu.c | ||
| crash_dump.c | ||
| crash.c | ||
| cyclone.c | ||
| dma-mapping.c | ||
| efi_stub.S | ||
| efi.c | ||
| elfcore.c | ||
| entry.h | ||
| entry.S | ||
| err_inject.c | ||
| esi_stub.S | ||
| esi.c | ||
| fsys.S | ||
| fsyscall_gtod_data.h | ||
| ftrace.c | ||
| gate-data.S | ||
| gate.lds.S | ||
| gate.S | ||
| head.S | ||
| ia64_ksyms.c | ||
| iosapic.c | ||
| irq_ia64.c | ||
| irq_lsapic.c | ||
| irq.c | ||
| irq.h | ||
| ivt.S | ||
| kprobes.c | ||
| machine_kexec.c | ||
| Makefile | ||
| Makefile.gate | ||
| mca_asm.S | ||
| mca_drv_asm.S | ||
| mca_drv.c | ||
| mca_drv.h | ||
| mca.c | ||
| minstate.h | ||
| module.c | ||
| msi_ia64.c | ||
| nr-irqs.c | ||
| numa.c | ||
| pal.S | ||
| palinfo.c | ||
| patch.c | ||
| pci-dma.c | ||
| perfmon_default_smpl.c | ||
| perfmon_generic.h | ||
| perfmon_itanium.h | ||
| perfmon_mckinley.h | ||
| perfmon_montecito.h | ||
| process.c | ||
| ptrace.c | ||
| relocate_kernel.S | ||
| sal.c | ||
| salinfo.c | ||
| setup.c | ||
| sigframe.h | ||
| signal.c | ||
| smp.c | ||
| smpboot.c | ||
| stacktrace.c | ||
| sys_ia64.c | ||
| time.c | ||
| topology.c | ||
| traps.c | ||
| unaligned.c | ||
| uncached.c | ||
| unwind_decoder.c | ||
| unwind_i.h | ||
| unwind.c | ||
| vmlinux.lds.S | ||