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SubjectRe: [PATCH] mm/alloc: fallback to first node if the wanted node offline
Hi Michal,

WIth this patch applied on the old one, I got the following message.
Please get it from attachment.

Thanks,
Pingfan

On Mon, Dec 17, 2018 at 9:29 PM Michal Hocko <mhocko@kernel.org> wrote:
>
> On Thu 13-12-18 17:04:01, Pingfan Liu wrote:
> [...]
> > > > @@ -592,6 +600,10 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
> > > > continue;
> > > >
> > > > alloc_node_data(nid);
> > > > + if (!end)
> > > > + init_memory_less_node(nid);
> >
> > Just have some opinion on this. Here is two issue. First, is this node
> > online?
>
>
> It shouldn't be as it doesn't have any memory.
>
> > I do not see node_set_online() is called in this patch.
>
> It is below for nodes with some memory.
>
> > Second, if node is online here, then init_memory_less_node->
> > free_area_init_node is called duplicated when free_area_init_nodes().
> > This should be a critical design issue.
>
> I am still trying to wrap my head around the expected code flow here.
> numa_init does the following for all CPUs within nr_cpu_ids (aka nr_cpus
> aware).
> if (!node_online(nid))
> numa_clear_node(i);
>
> I do not really understand why do we do this. But this enforces
> init_cpu_to_node to do init_memory_less_node (with the current upstream
> code) and that will mark the node online again and zonelists are built
> properly. My patch couldn't help in that respect because the node is
> offline (as it should be IMHO).
>
> So let's try another attempt with some larger surgery (on top of the
> previous patch). It will also dump the zonelist after it is built for
> each node. Let's see whether something more is lurking there.
>
> diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
> index a5548fe668fb..eb7c905d5d86 100644
> --- a/arch/x86/mm/numa.c
> +++ b/arch/x86/mm/numa.c
> @@ -525,19 +525,6 @@ static void __init numa_clear_kernel_node_hotplug(void)
> }
> }
>
> -static void __init init_memory_less_node(int nid)
> -{
> - unsigned long zones_size[MAX_NR_ZONES] = {0};
> - unsigned long zholes_size[MAX_NR_ZONES] = {0};
> -
> - free_area_init_node(nid, zones_size, 0, zholes_size);
> -
> - /*
> - * All zonelists will be built later in start_kernel() after per cpu
> - * areas are initialized.
> - */
> -}
> -
> static int __init numa_register_memblks(struct numa_meminfo *mi)
> {
> unsigned long uninitialized_var(pfn_align);
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 5411de93a363..99252a0b6551 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2045,6 +2045,8 @@ extern void __init pagecache_init(void);
> extern void free_area_init(unsigned long * zones_size);
> extern void __init free_area_init_node(int nid, unsigned long * zones_size,
> unsigned long zone_start_pfn, unsigned long *zholes_size);
> +extern void init_memory_less_node(int nid);
> +
> extern void free_initmem(void);
>
> /*
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 2ec9cc407216..a5c035fd6307 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -5234,6 +5234,8 @@ static void build_zonelists(pg_data_t *pgdat)
> int node, load, nr_nodes = 0;
> nodemask_t used_mask;
> int local_node, prev_node;
> + struct zone *zone;
> + struct zoneref *z;
>
> /* NUMA-aware ordering of nodes */
> local_node = pgdat->node_id;
> @@ -5259,6 +5261,11 @@ static void build_zonelists(pg_data_t *pgdat)
>
> build_zonelists_in_node_order(pgdat, node_order, nr_nodes);
> build_thisnode_zonelists(pgdat);
> +
> + pr_info("node[%d] zonelist: ", pgdat->node_id);
> + for_each_zone_zonelist(zone, z, &pgdat->node_zonelists[ZONELIST_FALLBACK], MAX_NR_ZONES-1)
> + pr_cont("%d:%s ", zone_to_nid(zone), zone->name);
> + pr_cont("\n");
> }
>
> #ifdef CONFIG_HAVE_MEMORYLESS_NODES
> @@ -5447,6 +5454,20 @@ void __ref build_all_zonelists(pg_data_t *pgdat)
> #endif
> }
>
> +void __init init_memory_less_node(int nid)
> +{
> + unsigned long zones_size[MAX_NR_ZONES] = {0};
> + unsigned long zholes_size[MAX_NR_ZONES] = {0};
> +
> + free_area_init_node(nid, zones_size, 0, zholes_size);
> + __build_all_zonelists(NODE_DATA(nid));
> +
> + /*
> + * All zonelists will be built later in start_kernel() after per cpu
> + * areas are initialized.
> + */
> +}
> +
> /* If zone is ZONE_MOVABLE but memory is mirrored, it is an overlapped init */
> static bool __meminit
> overlap_memmap_init(unsigned long zone, unsigned long *pfn)
> --
> Michal Hocko
> SUSE Labs
[ 0.000000] Linux version 4.20.0-rc7+
[ 0.000000] Command line: root=/dev/mapper/xx_dell--per7425--03-root ro crashkernel=500M rd.lvm.lv=xx_dell-per7425-03/root rd.lvm.lv=xx_dell-per7425-03/swap console=ttyS0,115200n81 earlyprintk=ttyS0,115200n81
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'compacted' format.
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000100-0x000000000008efff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000008f000-0x000000000008ffff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x0000000000090000-0x000000000009ffff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000005c3d6fff] usable
[ 0.000000] BIOS-e820: [mem 0x000000005c3d7000-0x00000000643defff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000643df000-0x0000000068ff7fff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000068ff8000-0x000000006b4f7fff] reserved
[ 0.000000] BIOS-e820: [mem 0x000000006b4f8000-0x000000006c327fff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x000000006c328000-0x000000006c527fff] ACPI data
[ 0.000000] BIOS-e820: [mem 0x000000006c528000-0x000000006fffffff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000070000000-0x000000008fffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fec10000-0x00000000fec10fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed80000-0x00000000fed80fff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000087effffff] usable
[ 0.000000] BIOS-e820: [mem 0x000000087f000000-0x000000087fffffff] reserved
[ 0.000000] printk: bootconsole [earlyser0] enabled
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] extended physical RAM map:
[ 0.000000] reserve setup_data: [mem 0x0000000000000100-0x000000000008efff] usable
[ 0.000000] reserve setup_data: [mem 0x000000000008f000-0x000000000008ffff] ACPI NVS
[ 0.000000] reserve setup_data: [mem 0x0000000000090000-0x000000000009ffff] usable
[ 0.000000] reserve setup_data: [mem 0x0000000000100000-0x000000000010006f] usable
[ 0.000000] reserve setup_data: [mem 0x0000000000100070-0x000000005c3d6fff] usable
[ 0.000000] reserve setup_data: [mem 0x000000005c3d7000-0x00000000643defff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000643df000-0x0000000068ff7fff] usable
[ 0.000000] reserve setup_data: [mem 0x0000000068ff8000-0x000000006b4f7fff] reserved
[ 0.000000] reserve setup_data: [mem 0x000000006b4f8000-0x000000006c327fff] ACPI NVS
[ 0.000000] reserve setup_data: [mem 0x000000006c328000-0x000000006c527fff] ACPI data
[ 0.000000] reserve setup_data: [mem 0x000000006c528000-0x000000006fffffff] usable
[ 0.000000] reserve setup_data: [mem 0x0000000070000000-0x000000008fffffff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000fec10000-0x00000000fec10fff] reserved
[ 0.000000] reserve setup_data: [mem 0x00000000fed80000-0x00000000fed80fff] reserved
[ 0.000000] reserve setup_data: [mem 0x0000000100000000-0x000000087effffff] usable
[ 0.000000] reserve setup_data: [mem 0x000000087f000000-0x000000087fffffff] reserved
[ 0.000000] efi: EFI v2.50 by Dell Inc.
[ 0.000000] efi: ACPI=0x6c527000 ACPI 2.0=0x6c527014 SMBIOS=0x6afde000 SMBIOS 3.0=0x6afdc000
[ 0.000000] SMBIOS 3.0.0 present.
[ 0.000000] DMI: Dell Inc. PowerEdge R7425/02MJ3T, BIOS 1.4.3 06/29/2018
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2095.973 MHz processor
[ 0.000066] last_pfn = 0x87f000 max_arch_pfn = 0x400000000
[ 0.006389] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
Memory KASLR using RDRAND RDTSC...
[ 0.016603] last_pfn = 0x70000 max_arch_pfn = 0x400000000
[ 0.027381] Using GB pages for direct mapping
[ 0.031993] Secure boot could not be determined
[ 0.036341] RAMDISK: [mem 0x87a171000-0x87cdfffff]
[ 0.041121] ACPI: Early table checksum verification disabled
[ 0.046749] ACPI: RSDP 0x000000006C527014 000024 (v02 DELL )
[ 0.052463] ACPI: XSDT 0x000000006C5260E8 0000C4 (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.060961] ACPI: FACP 0x000000006C516000 000114 (v06 DELL PE_SC3 00000002 DELL 00000001)
[ 0.069455] ACPI: DSDT 0x000000006C505000 00D302 (v02 DELL PE_SC3 00000002 DELL 00000001)
[ 0.077944] ACPI: FACS 0x000000006C2F1000 000040
[ 0.082539] ACPI: SSDT 0x000000006C525000 0000D2 (v02 DELL PE_SC3 00000002 MSFT 04000000)
[ 0.091031] ACPI: BERT 0x000000006C524000 000030 (v01 DELL BERT 00000001 DELL 00000001)
[ 0.099525] ACPI: HEST 0x000000006C523000 0006DC (v01 DELL HEST 00000001 DELL 00000001)
[ 0.108019] ACPI: SSDT 0x000000006C522000 0001C4 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.116511] ACPI: SRAT 0x000000006C521000 0002D0 (v03 DELL PE_SC3 00000001 AMD 00000001)
[ 0.125005] ACPI: MSCT 0x000000006C520000 0000A6 (v01 DELL PE_SC3 00000000 AMD 00000001)
[ 0.133500] ACPI: SLIT 0x000000006C51F000 00006C (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.141994] ACPI: CRAT 0x000000006C51C000 002210 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.150486] ACPI: CDIT 0x000000006C51B000 000068 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.158980] ACPI: SSDT 0x000000006C51A000 0003C6 (v02 DELL Tpm2Tabl 00001000 INTL 20170119)
[ 0.167474] ACPI: TPM2 0x000000006C519000 000038 (v04 DELL PE_SC3 00000002 DELL 00000001)
[ 0.175969] ACPI: EINJ 0x000000006C518000 000150 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.184461] ACPI: SLIC 0x000000006C517000 000024 (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.192955] ACPI: HPET 0x000000006C515000 000038 (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.201449] ACPI: APIC 0x000000006C514000 0004B2 (v03 DELL PE_SC3 00000002 DELL 00000001)
[ 0.209943] ACPI: MCFG 0x000000006C513000 00003C (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.218435] ACPI: SSDT 0x000000006C504000 0005CA (v02 DELL xhc_port 00000001 INTL 20170119)
[ 0.226929] ACPI: IVRS 0x000000006C503000 000390 (v02 DELL PE_SC3 00000001 AMD 00000000)
[ 0.235424] ACPI: SSDT 0x000000006C501000 001658 (v01 AMD CPMCMN 00000001 INTL 20170119)
[ 0.243977] SRAT: PXM 0 -> APIC 0x00 -> Node 0
[ 0.248338] SRAT: PXM 0 -> APIC 0x01 -> Node 0
[ 0.252756] SRAT: PXM 0 -> APIC 0x08 -> Node 0
[ 0.257177] SRAT: PXM 0 -> APIC 0x09 -> Node 0
[ 0.261598] SRAT: PXM 1 -> APIC 0x10 -> Node 1
[ 0.266018] SRAT: PXM 1 -> APIC 0x11 -> Node 1
[ 0.270437] SRAT: PXM 1 -> APIC 0x18 -> Node 1
[ 0.274857] SRAT: PXM 1 -> APIC 0x19 -> Node 1
[ 0.279278] SRAT: PXM 2 -> APIC 0x20 -> Node 2
[ 0.283699] SRAT: PXM 2 -> APIC 0x21 -> Node 2
[ 0.288117] SRAT: PXM 2 -> APIC 0x28 -> Node 2
[ 0.292538] SRAT: PXM 2 -> APIC 0x29 -> Node 2
[ 0.296959] SRAT: PXM 3 -> APIC 0x30 -> Node 3
[ 0.301380] SRAT: PXM 3 -> APIC 0x31 -> Node 3
[ 0.305801] SRAT: PXM 3 -> APIC 0x38 -> Node 3
[ 0.310219] SRAT: PXM 3 -> APIC 0x39 -> Node 3
[ 0.314640] SRAT: PXM 4 -> APIC 0x40 -> Node 4
[ 0.319060] SRAT: PXM 4 -> APIC 0x41 -> Node 4
[ 0.323481] SRAT: PXM 4 -> APIC 0x48 -> Node 4
[ 0.327899] SRAT: PXM 4 -> APIC 0x49 -> Node 4
[ 0.332320] SRAT: PXM 5 -> APIC 0x50 -> Node 5
[ 0.336741] SRAT: PXM 5 -> APIC 0x51 -> Node 5
[ 0.341162] SRAT: PXM 5 -> APIC 0x58 -> Node 5
[ 0.345580] SRAT: PXM 5 -> APIC 0x59 -> Node 5
[ 0.350001] SRAT: PXM 6 -> APIC 0x60 -> Node 6
[ 0.354422] SRAT: PXM 6 -> APIC 0x61 -> Node 6
[ 0.358843] SRAT: PXM 6 -> APIC 0x68 -> Node 6
[ 0.363261] SRAT: PXM 6 -> APIC 0x69 -> Node 6
[ 0.367682] SRAT: PXM 7 -> APIC 0x70 -> Node 7
[ 0.372103] SRAT: PXM 7 -> APIC 0x71 -> Node 7
[ 0.376521] SRAT: PXM 7 -> APIC 0x78 -> Node 7
[ 0.380942] SRAT: PXM 7 -> APIC 0x79 -> Node 7
[ 0.385365] ACPI: SRAT: Node 1 PXM 1 [mem 0x00000000-0x0009ffff]
[ 0.391344] ACPI: SRAT: Node 1 PXM 1 [mem 0x00100000-0x7fffffff]
[ 0.397323] ACPI: SRAT: Node 1 PXM 1 [mem 0x100000000-0x47fffffff]
[ 0.403476] ACPI: SRAT: Node 5 PXM 5 [mem 0x480000000-0x87fffffff]
[ 0.409637] NUMA: Node 1 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0x7fffffff] -> [mem 0x00000000-0x7fffffff]
[ 0.419858] NUMA: Node 1 [mem 0x00000000-0x7fffffff] + [mem 0x100000000-0x47fffffff] -> [mem 0x00000000-0x47fffffff]
[ 0.430356] NODE_DATA(0) allocated [mem 0x87efd4000-0x87effefff]
[ 0.436325] NODE_DATA(0) on node 5
[ 0.440092] Initmem setup node 0 [mem 0x0000000000000000-0x0000000000000000]
[ 0.447078] node[0] zonelist:
[ 0.450106] NODE_DATA(1) allocated [mem 0x47ffd5000-0x47fffffff]
[ 0.456114] NODE_DATA(2) allocated [mem 0x87efa9000-0x87efd3fff]
[ 0.462064] NODE_DATA(2) on node 5
[ 0.465852] Initmem setup node 2 [mem 0x0000000000000000-0x0000000000000000]
[ 0.472813] node[2] zonelist:
[ 0.475846] NODE_DATA(3) allocated [mem 0x87ef7e000-0x87efa8fff]
[ 0.481827] NODE_DATA(3) on node 5
[ 0.485590] Initmem setup node 3 [mem 0x0000000000000000-0x0000000000000000]
[ 0.492575] node[3] zonelist:
[ 0.495608] NODE_DATA(4) allocated [mem 0x87ef53000-0x87ef7dfff]
[ 0.501587] NODE_DATA(4) on node 5
[ 0.505349] Initmem setup node 4 [mem 0x0000000000000000-0x0000000000000000]
[ 0.512334] node[4] zonelist:
[ 0.515370] NODE_DATA(5) allocated [mem 0x87ef28000-0x87ef52fff]
[ 0.521384] NODE_DATA(6) allocated [mem 0x87eefd000-0x87ef27fff]
[ 0.527329] NODE_DATA(6) on node 5
[ 0.531091] Initmem setup node 6 [mem 0x0000000000000000-0x0000000000000000]
[ 0.538076] node[6] zonelist:
[ 0.541109] NODE_DATA(7) allocated [mem 0x87eed2000-0x87eefcfff]
[ 0.547090] NODE_DATA(7) on node 5
[ 0.550851] Initmem setup node 7 [mem 0x0000000000000000-0x0000000000000000]
[ 0.557836] node[7] zonelist:
[ 0.561005] Reserving 500MB of memory at 384MB for crashkernel (System RAM: 32314MB)
[ 0.568633] Zone ranges:
[ 0.571098] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.577250] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.583403] Normal [mem 0x0000000100000000-0x000000087effffff]
[ 0.589557] Device empty
[ 0.592418] Movable zone start for each node
[ 0.596666] Early memory node ranges
[ 0.600217] node 1: [mem 0x0000000000001000-0x000000000008efff]
[ 0.606459] node 1: [mem 0x0000000000090000-0x000000000009ffff]
[ 0.612698] node 1: [mem 0x0000000000100000-0x000000005c3d6fff]
[ 0.618940] node 1: [mem 0x00000000643df000-0x0000000068ff7fff]
[ 0.625179] node 1: [mem 0x000000006c528000-0x000000006fffffff]
[ 0.631419] node 1: [mem 0x0000000100000000-0x000000047fffffff]
[ 0.637660] node 5: [mem 0x0000000480000000-0x000000087effffff]
[ 0.644645] Zeroed struct page in unavailable ranges: 46490 pages
[ 0.644646] Initmem setup node 1 [mem 0x0000000000001000-0x000000047fffffff]
[ 0.672700] Initmem setup node 5 [mem 0x0000000480000000-0x000000087effffff]
[ 0.681057] ACPI: PM-Timer IO Port: 0x408
[ 0.684905] ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
[ 0.690808] IOAPIC[0]: apic_id 128, version 33, address 0xfec00000, GSI 0-23
[ 0.697804] IOAPIC[1]: apic_id 129, version 33, address 0xfd880000, GSI 24-55
[ 0.704913] IOAPIC[2]: apic_id 130, version 33, address 0xea900000, GSI 56-87
[ 0.712019] IOAPIC[3]: apic_id 131, version 33, address 0xdd900000, GSI 88-119
[ 0.719211] IOAPIC[4]: apic_id 132, version 33, address 0xd0900000, GSI 120-151
[ 0.726493] IOAPIC[5]: apic_id 133, version 33, address 0xc3900000, GSI 152-183
[ 0.733775] IOAPIC[6]: apic_id 134, version 33, address 0xb6900000, GSI 184-215
[ 0.741053] IOAPIC[7]: apic_id 135, version 33, address 0xa9900000, GSI 216-247
[ 0.748335] IOAPIC[8]: apic_id 136, version 33, address 0x9c900000, GSI 248-279
[ 0.755611] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.761938] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
[ 0.768442] Using ACPI (MADT) for SMP configuration information
[ 0.774331] ACPI: HPET id: 0x10228201 base: 0xfed00000
[ 0.779454] smpboot: Allowing 128 CPUs, 96 hotplug CPUs
[ 0.784670] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.791059] PM: Registered nosave memory: [mem 0x0008f000-0x0008ffff]
[ 0.797471] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[ 0.803884] PM: Registered nosave memory: [mem 0x00100000-0x00100fff]
[ 0.810299] PM: Registered nosave memory: [mem 0x5c3d7000-0x643defff]
[ 0.816714] PM: Registered nosave memory: [mem 0x68ff8000-0x6b4f7fff]
[ 0.823125] PM: Registered nosave memory: [mem 0x6b4f8000-0x6c327fff]
[ 0.829538] PM: Registered nosave memory: [mem 0x6c328000-0x6c527fff]
[ 0.835953] PM: Registered nosave memory: [mem 0x70000000-0x8fffffff]
[ 0.842366] PM: Registered nosave memory: [mem 0x90000000-0xfec0ffff]
[ 0.848780] PM: Registered nosave memory: [mem 0xfec10000-0xfec10fff]
[ 0.855194] PM: Registered nosave memory: [mem 0xfec11000-0xfed7ffff]
[ 0.861608] PM: Registered nosave memory: [mem 0xfed80000-0xfed80fff]
[ 0.868021] PM: Registered nosave memory: [mem 0xfed81000-0xffffffff]
[ 0.874437] [mem 0x90000000-0xfec0ffff] available for PCI devices
[ 0.880504] Booting paravirtualized kernel on bare hardware
[ 0.886053] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
[ 1.004227] random: get_random_bytes called from start_kernel+0x9b/0x52e with crng_init=0
[ 1.012234] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:128 nr_cpu_ids:128 nr_node_ids:8
[ 1.020744] setup_percpu: cpu 0 has no node 0 or node-local memory
[ 1.027245] setup_percpu: cpu 1 has no node 4 or node-local memory
[ 1.039287] setup_percpu: cpu 4 has no node 2 or node-local memory
[ 1.045667] setup_percpu: cpu 5 has no node 6 or node-local memory
[ 1.052041] setup_percpu: cpu 6 has no node 3 or node-local memory
[ 1.058421] setup_percpu: cpu 7 has no node 7 or node-local memory
[ 1.067658] percpu: Embedded 46 pages/cpu @(____ptrval____) s151552 r8192 d28672 u262144
[ 1.075692] node[1] zonelist: 1:Normal 1:DMA32 1:DMA 5:Normal
[ 1.081376] node[5] zonelist: 5:Normal 1:Normal 1:DMA32 1:DMA
[ 1.087206] Built 2 zonelists, mobility grouping off. Total pages: 0
[ 1.093597] Policy zone: Normal
[ 1.096722] Kernel command line: root=/dev/mapper/xx_dell--per7425--03-root ro crashkernel=500M rd.lvm.lv=xx_dell-per7425-03/root rd.lvm.lv=xx_dell-per7425-03/swap console=ttyS0,115200n81 earlyprintk=ttyS0,115200n81
[ 1.140827] Memory: 1333560K/33089944K available (12292K kernel code, 2066K rwdata, 3756K rodata, 2352K init, 6524K bss, 1202452K reserved, 0K cma-reserved)
[ 1.154706] swapper: page allocation failure: order:0, mode:0x4000(__GFP_COMP), nodemask=(null)
[ 1.163300] swapper cpuset=(null) mems_allowed=0-1023
[ 1.168327] CPU: 0 PID: 0 Comm: swapper Not tainted 4.20.0-rc7+ #16
[ 1.174564] Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS 1.4.3 06/29/2018
[ 1.182107] Call Trace:
[ 1.184550] dump_stack+0x5c/0x7b
[ 1.187832] warn_alloc+0xf5/0x180
[ 1.191212] ? __raw_callee_save___native_queued_spin_unlock+0x11/0x1e
[ 1.197708] __alloc_pages_slowpath+0x84f/0xa0d
[ 1.202218] ? pcpu_block_refresh_hint+0x77/0xa0
[ 1.206807] __alloc_pages_nodemask+0x299/0x2e0
[ 1.211319] new_slab+0x425/0x570
[ 1.214608] ___slab_alloc+0x375/0x540
[ 1.218339] ? bootstrap+0x1b/0xcb
[ 1.221713] ? __kmem_cache_create+0x2b/0x150
[ 1.226050] ? printk+0x58/0x6f
[ 1.229166] ? bootstrap+0x1b/0xcb
[ 1.232548] __slab_alloc+0x1c/0x38
[ 1.236014] kmem_cache_alloc+0x192/0x1c0
[ 1.240001] bootstrap+0x1b/0xcb
[ 1.243213] kmem_cache_init+0x8d/0x109
[ 1.247026] start_kernel+0x26c/0x52e
[ 1.250662] ? set_init_arg+0x55/0x55
[ 1.254306] secondary_startup_64+0xa4/0xb0
[ 1.258464] Mem-Info:
[ 1.260719] active_anon:0 inactive_anon:0 isolated_anon:0
[ 1.260719] active_file:0 inactive_file:0 isolated_file:0
[ 1.260719] unevictable:0 dirty:0 writeback:0 unstable:0
[ 1.260719] slab_reclaimable:0 slab_unreclaimable:2
[ 1.260719] mapped:0 shmem:0 pagetables:0 bounce:0
[ 1.260719] free:333388 free_pcp:0 free_cma:0
[ 1.291140] Node 1 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
[ 1.316533] Node 5 active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
[ 1.341925] Node 1 DMA free:15896kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15896kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
[ 1.367319] lowmem_reserve[]: 0 0 0 0 0
[ 1.371132] Node 1 DMA32 free:1055520kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1633056kB managed:1055520kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
[ 1.397221] lowmem_reserve[]: 0 0 0 0 0
[ 1.401033] Node 1 Normal free:131068kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:14680064kB managed:131072kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
[ 1.427122] lowmem_reserve[]: 0 0 0 0 0
[ 1.430934] Node 5 Normal free:131068kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:16760832kB managed:131072kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
[ 1.457023] lowmem_reserve[]: 0 0 0 0 0
[ 1.460837] Node 1 DMA: 2*4kB (U) 2*8kB (U) 2*16kB (U) 3*32kB (U) 2*64kB (U) 2*128kB (U) 2*256kB (U) 1*512kB (U) 0*1024kB 1*2048kB (M) 3*4096kB (M) = 15896kB
[ 1.474876] Node 1 DMA32: 2*4kB (M) 1*8kB (M) 1*16kB (M) 2*32kB (M) 3*64kB (M) 2*128kB (M) 3*256kB (M) 3*512kB (M) 2*1024kB (M) 3*2048kB (M) 255*4096kB (M) = 1055520kB
[ 1.489784] Node 1 Normal: 1*4kB (U) 1*8kB (U) 1*16kB (U) 1*32kB (U) 1*64kB (U) 1*128kB (U) 1*256kB (U) 1*512kB (U) 1*1024kB (U) 1*2048kB (U) 31*4096kB (M) = 131068kB
[ 1.504603] Node 5 Normal: 1*4kB (U) 1*8kB (U) 1*16kB (U) 1*32kB (U) 1*64kB (U) 1*128kB (U) 1*256kB (U) 1*512kB (U) 1*1024kB (U) 1*2048kB (U) 31*4096kB (M) = 131068kB
[ 1.519425] 0 total pagecache pages
[ 1.522894] 0 pages in swap cache
[ 1.526185] Swap cache stats: add 0, delete 0, find 0/0
[ 1.531385] Free swap = 0kB
[ 1.534245] Total swap = 0kB
[ 1.537106] 8272486 pages RAM
[ 1.540052] 0 pages HighMem/MovableOnly
[ 1.543866] 7939096 pages reserved
[ 1.547247] 0 pages cma reserved
[ 1.550454] 0 pages hwpoisoned
[ 1.553489] SLUB: Unable to allocate memory on node -1, gfp=0x408000(GFP_NOWAIT|__GFP_ZERO)
[ 1.561808] cache: kmem_cache, object size: 392, buffer size: 448, default order: 2, min order: 0
[ 1.570822] node 1: slabs: 0, objs: 0, free: 0
[ 1.575415] node 5: slabs: 0, objs: 0, free: 0
[ 1.580023] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
[ 1.587810] PGD 0 P4D 0
[ 1.590323] Oops: 0002 [#1] SMP NOPTI
[ 1.593962] CPU: 0 PID: 0 Comm: swapper Not tainted 4.20.0-rc7+ #16
[ 1.600202] Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS 1.4.3 06/29/2018
[ 1.607744] RIP: 0010:bootstrap+0x2e/0xcb
[ 1.611731] Code: ff 55 48 89 fd 48 8b 3d 59 c0 42 00 be 00 80 40 00 53 e8 de c8 aa fe 48 89 c3 48 8b 05 44 c0 42 00 48 89 ee 48 89 df 8b 48 1c <f3> a4 65 8b 35 22 b8 65 5d 48 89 df e8 7a d7 aa fe 44 8b 05 0b 6b
[ 1.630452] RSP: 0000:ffffffffa2403ed0 EFLAGS: 00010046
[ 1.635652] RAX: ffffffffa2ae6600 RBX: 0000000000000000 RCX: 0000000000000188
[ 1.642756] RDX: 00000000000001c0 RSI: ffffffffa2ae6600 RDI: 0000000000000000
[ 1.649866] RBP: ffffffffa2ae6600 R08: 0000000030203a65 R09: 000000000000014f
[ 1.656972] R10: 736a626f202c3020 R11: 657266202c30203a R12: ffffffffa2a2e900
[ 1.664079] R13: ffffffffa2a492c0 R14: 0000000000000000 R15: 0000000000000000
[ 1.671187] FS: 0000000000000000(0000) GS:ffff8e4029c00000(0000) knlGS:0000000000000000
[ 1.679245] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.684966] CR2: 0000000000000000 CR3: 000000087e00a000 CR4: 00000000000406b0
[ 1.692074] Call Trace:
[ 1.694500] kmem_cache_init+0x8d/0x109
[ 1.698313] start_kernel+0x26c/0x52e
[ 1.701954] ? set_init_arg+0x55/0x55
[ 1.705594] secondary_startup_64+0xa4/0xb0
[ 1.709756] Modules linked in:
[ 1.712787] CR2: 0000000000000000
[ 1.716122] ---[ end trace 379bf944903e3d0a ]---
[ 1.720674] RIP: 0010:bootstrap+0x2e/0xcb
[ 1.724661] Code: ff 55 48 89 fd 48 8b 3d 59 c0 42 00 be 00 80 40 00 53 e8 de c8 aa fe 48 89 c3 48 8b 05 44 c0 42 00 48 89 ee 48 89 df 8b 48 1c <f3> a4 65 8b 35 22 b8 65 5d 48 89 df e8 7a d7 aa fe 44 8b 05 0b 6b
[ 1.743381] RSP: 0000:ffffffffa2403ed0 EFLAGS: 00010046
[ 1.748581] RAX: ffffffffa2ae6600 RBX: 0000000000000000 RCX: 0000000000000188
[ 1.755688] RDX: 00000000000001c0 RSI: ffffffffa2ae6600 RDI: 0000000000000000
[ 1.762794] RBP: ffffffffa2ae6600 R08: 0000000030203a65 R09: 000000000000014f
[ 1.769904] R10: 736a626f202c3020 R11: 657266202c30203a R12: ffffffffa2a2e900
[ 1.777010] R13: ffffffffa2a492c0 R14: 0000000000000000 R15: 0000000000000000
[ 1.784118] FS: 0000000000000000(0000) GS:ffff8e4029c00000(0000) knlGS:0000000000000000
[ 1.792178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.797896] CR2: 0000000000000000 CR3: 000000087e00a000 CR4: 00000000000406b0
[ 1.805006] Kernel panic - not syncing: Fatal exception
[ 1.810277] ---[ end Kernel panic - not syncing: Fatal exception ]---
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