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linux/arch/x86/kernel
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Peter Zijlstra cabdc3a847 sched,x86: Don't use cluster topology for x86 hybrid CPUs 
For x86 hybrid CPUs like Alder Lake, the order of CPU selection should
be based strictly on CPU priority.  Don't include cluster topology for
hybrid CPUs to avoid interference with such CPU selection order.

On Alder Lake, the Atom CPU cluster has more capacity (4 Atom CPUs) vs
Big core cluster (2 hyperthread CPUs). This could potentially bias CPU
selection towards Atom over Big Core, when Big core CPU has higher
priority.

Fixes: 66558b730f25 ("sched: Add cluster scheduler level for x86")
Suggested-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Tested-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Link: https://lkml.kernel.org/r/20211204091402.GM16608@worktop.programming.kicks-ass.net
2021-12-08 22:15:37 +01:00
..
acpi
x86: ACPI: cstate: Optimize C3 entry on AMD CPUs
2021-10-01 20:44:31 +02:00
apic
x86/apic: Reduce cache line misses in __x2apic_send_IPI_mask()
2021-10-29 10:02:17 +02:00
cpu
Two X86 fixes:
2021-11-21 11:25:19 -08:00
fpu
x86/fpu/signal: Initialize sw_bytes in save_xstate_epilog()
2021-11-30 15:13:47 -08:00
kprobes
ftrace: disable preemption when recursion locked
2021-10-27 11:21:49 -04:00
.gitignore
…
alternative.c
x86/alternative: Add debug prints to apply_retpolines()
2021-10-28 23:25:28 +02:00
amd_gart_64.c
x86/amd_gart: don't set failed sg dma_address to DMA_MAPPING_ERROR
2021-08-09 17:13:06 +02:00
amd_nb.c
hwmon: (k10temp) Add support for yellow carp
2021-08-27 13:54:58 -07:00
aperture_64.c
proc/vmcore: convert oldmem_pfn_is_ram callback to more generic vmcore callbacks
2021-11-09 10:02:48 -08:00
apm_32.c
x86: Fix various typos in comments, take #2
2021-03-21 23:50:28 +01:00
asm-offsets_32.c
x86/stackprotector/32: Make the canary into a regular percpu variable
2021-03-08 13:19:05 +01:00
asm-offsets_64.c
x86/xen: Drop USERGS_SYSRET64 paravirt call
2021-02-10 12:32:07 +01:00
asm-offsets.c
x86/paravirt: Switch iret pvops to ALTERNATIVE
2021-03-11 19:58:54 +01:00
audit_64.c
audit: add support for the openat2 syscall
2021-10-01 16:52:48 -04:00
bootflag.c
…
cc_platform.c
x86/sev: Add an x86 version of cc_platform_has()
2021-10-04 11:46:20 +02:00
check.c
…
cpuid.c
smp: Cleanup smp_call_function*()
2020-11-24 16:47:49 +01:00
crash_core_32.c
…
crash_core_64.c
…
crash_dump_32.c
x86/crashdump/32: Simplify copy_oldmem_page()
2020-11-24 14:42:09 +01:00
crash_dump_64.c
x86/sev: Replace occurrences of sev_active() with cc_platform_has()
2021-10-04 11:46:58 +02:00
crash.c
x86/crash: Remove crash_reserve_low_1M()
2021-06-07 12:14:45 +02:00
devicetree.c
Devicetree updates for v5.16:
2021-11-02 22:22:13 -07:00
doublefault_32.c
exit/doublefault: Remove apparently bogus comment about rewind_stack_do_exit
2021-10-20 13:09:43 -05:00
dumpstack_32.c
…
dumpstack_64.c
x86/mm/64: Improve stack overflow warnings
2021-09-21 13:57:43 +02:00
dumpstack.c
x86/dumpstack: use %pSb/%pBb for backtrace printing
2021-07-08 11:48:22 -07:00
e820.c
Power management updates for 5.13-rc1
2021-04-26 15:10:25 -07:00
early_printk.c
…
early-quirks.c
x86/hpet: Use another crystalball to evaluate HPET usability
2021-10-01 13:38:13 +02:00
ebda.c
…
eisa.c
…
espfix_64.c
…
ftrace_32.S
…
ftrace_64.S
x86/ftrace: Make function graph use ftrace directly
2021-10-20 23:44:43 -04:00
ftrace.c
x86/ftrace: Make function graph use ftrace directly
2021-10-20 23:44:43 -04:00
head32.c
…
head64.c
treewide: Replace the use of mem_encrypt_active() with cc_platform_has()
2021-10-04 11:47:24 +02:00
head_32.S
printk: Userspace format indexing support
2021-07-19 11:57:48 +02:00
head_64.S
x86/entry: Unify definitions from <asm/calling.h> and <asm/ptrace-abi.h>
2021-05-12 10:49:13 +02:00
hpet.c
x86/hpet: Use another crystalball to evaluate HPET usability
2021-10-01 13:38:13 +02:00
hw_breakpoint.c
x86/debug: Prevent data breakpoints on cpu_dr7
2021-02-05 20:13:12 +01:00
i8237.c
…
i8253.c
…
i8259.c
x86: Avoid magic number with ELCR register accesses
2021-08-10 23:31:43 +02:00
idt.c
X86 interrupt related changes:
2021-06-29 12:36:59 -07:00
io_delay.c
…
ioport.c
…
irq_32.c
x86/softirq: Disable softirq stacks on PREEMPT_RT
2021-09-27 12:28:32 +02:00
irq_64.c
x86/softirq/64: Inline do_softirq_own_stack()
2021-02-10 23:34:17 +01:00
irq_work.c
…
irq.c
x86/irq: Ensure PI wakeup handler is unregistered before module unload
2021-10-22 12:45:35 -04:00
irqflags.S
x86/xen: Make save_fl() noinstr
2021-09-17 13:14:44 +02:00
irqinit.c
x86/headers: Remove APIC headers from <asm/smp.h>
2020-08-06 16:13:09 +02:00
itmt.c
x86/sched: Decrease further the priorities of SMT siblings
2021-10-05 15:51:59 +02:00
jailhouse.c
locking/seqlock, headers: Untangle the spaghetti monster
2020-08-06 16:13:13 +02:00
jump_label.c
jump_labels: Mark __jump_label_transform() as __always_inlined to work around aggressive compiler un-inlining
2021-07-13 06:32:05 +02:00
kdebugfs.c
…
kexec-bzimage64.c
x86: Use ELF fields defined in 'struct kimage'
2021-03-08 12:06:29 -07:00
kgdb.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
ksysfs.c
…
kvm.c
Merge branch 'kvm-5.16-fixes' into kvm-master
2021-11-11 11:03:05 -05:00
kvmclock.c
x86/sev: Replace occurrences of sev_active() with cc_platform_has()
2021-10-04 11:46:58 +02:00
ldt.c
memcg: enable accounting for ldt_struct objects
2021-09-03 09:58:13 -07:00
machine_kexec_32.c
x86/kexec: Set_[gi]dt() -> native_[gi]dt_invalidate() in machine_kexec_*.c
2021-05-21 12:36:45 +02:00
machine_kexec_64.c
x86/sev: Replace occurrences of sev_active() with cc_platform_has()
2021-10-04 11:46:58 +02:00
Makefile
x86/sev: Add an x86 version of cc_platform_has()
2021-10-04 11:46:20 +02:00
mmconf-fam10h_64.c
x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG
2021-05-10 07:51:38 +02:00
module.c
x86/alternative: Implement .retpoline_sites support
2021-10-28 23:25:27 +02:00
mpparse.c
x86: Avoid magic number with ELCR register accesses
2021-08-10 23:31:43 +02:00
msr.c
x86/MSR: Filter MSR writes through X86_IOC_WRMSR_REGS ioctl too
2021-01-27 19:06:47 +01:00
nmi_selftest.c
…
nmi.c
x86/sev-es: Rename sev-es.{ch} to sev.{ch}
2021-05-10 07:40:27 +02:00
paravirt-spinlocks.c
x86/paravirt: Add new features for paravirt patching
2021-03-11 19:51:49 +01:00
paravirt.c
Merge branch 'kvm-guest-sev-migration' into kvm-master
2021-11-11 07:40:26 -05:00
pci-dma.c
dma-mapping: move dma-debug.h to kernel/dma/
2020-10-06 07:07:05 +02:00
pci-iommu_table.c
x86: Remove definition of DEBUG
2021-01-15 08:23:10 +01:00
pci-swiotlb.c
x86/sme: Replace occurrences of sme_active() with cc_platform_has()
2021-10-04 11:46:46 +02:00
pcspeaker.c
…
perf_regs.c
- Remove all uses of TIF_IA32 and TIF_X32 and reclaim the two bits in the end
2020-12-14 13:45:26 -08:00
platform-quirks.c
…
pmem.c
…
probe_roms.c
x86/pci/probe_roms: Use to_pci_driver() instead of pci_dev->driver
2021-10-18 09:20:15 -05:00
process_32.c
x86/fpu: Move context switch and exit to user inlines into sched.h
2021-10-20 15:27:27 +02:00
process_64.c
x86/fpu: Move context switch and exit to user inlines into sched.h
2021-10-20 15:27:27 +02:00
process.c
x86: Pin task-stack in __get_wchan()
2021-11-19 10:14:57 -08:00
process.h
…
ptrace.c
x86/fpu: Remove internal.h dependency from fpu/signal.h
2021-10-20 15:27:29 +02:00
pvclock.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
quirks.c
x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()
2020-10-06 11:18:04 +02:00
reboot_fixups_32.c
…
reboot.c
x86/reboot: Limit Dell Optiplex 990 quirk to early BIOS versions
2021-08-12 12:06:58 +02:00
relocate_kernel_32.S
x86: Fix various typos in comments, take #2
2021-03-21 23:50:28 +01:00
relocate_kernel_64.S
x86/sme: Replace occurrences of sme_active() with cc_platform_has()
2021-10-04 11:46:46 +02:00
resource.c
…
rtc.c
…
setup_percpu.c
memblock: use memblock_free for freeing virtual pointers
2021-11-06 13:30:41 -07:00
setup.c
x86/boot: Mark prepare_command_line() __init
2021-11-24 12:20:24 +01:00
sev_verify_cbit.S
x86/boot/compressed/64: Check SEV encryption in 64-bit boot-path
2020-10-29 18:06:52 +01:00
sev-shared.c
- Export sev_es_ghcb_hv_call() so that HyperV Isolation VMs can use it too
2021-11-01 15:52:26 -07:00
sev.c
x86/sev: Fix SEV-ES INS/OUTS instructions for word, dword, and qword
2021-12-03 18:09:30 +01:00
signal_compat.c
signal: Verify the alignment and size of siginfo_t
2021-07-23 13:15:31 -05:00
signal.c
x86/signal: Use fpu::__state_user_size for sigalt stack validation
2021-10-26 10:18:09 +02:00
smp.c
x86: Fix various typos in comments, take #2
2021-03-21 23:50:28 +01:00
smpboot.c
sched,x86: Don't use cluster topology for x86 hybrid CPUs
2021-12-08 22:15:37 +01:00
stacktrace.c
stacktrace: Move documentation for arch_stack_walk_reliable() to header
2021-03-10 15:52:31 +01:00
static_call.c
static_call,x86: Robustify trampoline patching
2021-11-11 13:09:31 +01:00
step.c
entry: Ensure trap after single-step on system call return
2021-02-06 00:21:42 +01:00
sys_ia32.c
x86: switch to kernel_clone()
2020-08-20 13:12:58 +02:00
sys_x86_64.c
x86/mm: Refine mmap syscall implementation
2021-01-05 19:07:42 +01:00
tboot.c
x86/boot/tboot: Avoid Wstringop-overread-warning
2021-03-23 00:16:13 +01:00
time.c
…
tls.c
x86/stackprotector/32: Make the canary into a regular percpu variable
2021-03-08 13:19:05 +01:00
tls.h
x86: switch to ->regset_get()
2020-07-27 14:31:07 -04:00
topology.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
trace_clock.c
…
trace.c
trace/osnoise: Fix an ifdef comment
2021-10-25 23:02:36 -04:00
tracepoint.c
…
traps.c
- Do not #GP on userspace use of CLI/STI but pretend it was a NOP to
2021-11-02 07:56:47 -07:00
tsc_msr.c
Misc fixes and small updates all around the place:
2020-08-15 10:38:03 -07:00
tsc_sync.c
x86/tsc: Add a timer to make sure TSC_adjust is always checked
2021-12-02 00:40:35 +01:00
tsc.c
x86/tsc: Disable clocksource watchdog for TSC on qualified platorms
2021-12-02 00:40:36 +01:00
umip.c
x86/umip: Downgrade warning messages to debug loglevel
2021-09-25 13:23:28 +02:00
unwind_frame.c
x86/unwind: Recover kretprobe trampoline entry
2021-09-30 21:24:07 -04:00
unwind_guess.c
x86/unwind: Recover kretprobe trampoline entry
2021-09-30 21:24:07 -04:00
unwind_orc.c
Merge branch 'akpm' (patches from Andrew)
2021-11-09 10:11:53 -08:00
uprobes.c
x86/uprobes: Convert to insn_decode()
2021-03-15 12:05:03 +01:00
verify_cpu.S
…
vm86_32.c
signal: Replace force_fatal_sig with force_exit_sig when in doubt
2021-11-19 09:15:58 -06:00
vmlinux.lds.S
objtool,x86: Replace alternatives with .retpoline_sites
2021-10-28 23:25:25 +02:00
vsmp_64.c
…
x86_init.c
x86/apic: Support 15 bits of APIC ID in MSI where available
2020-10-28 20:26:29 +01:00