Re: [PATCH] mm/alloc: fallback to first node if the wanted node offline
From: Pingfan Liu
Date: Thu Dec 13 2018 - 03:37:55 EST
On Wed, Dec 12, 2018 at 7:53 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
>
> On Wed 12-12-18 16:31:35, Pingfan Liu wrote:
> > On Mon, Dec 10, 2018 at 8:37 PM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> > >
> > [...]
> > >
> > > In other words. Does the following work? I am sorry to wildguess this
> > > way but I am not able to recreate your setups to play with this myself.
> > >
> > > diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
> > > index 1308f5408bf7..d51643e10d00 100644
> > > --- a/arch/x86/mm/numa.c
> > > +++ b/arch/x86/mm/numa.c
> > > @@ -216,8 +216,6 @@ static void __init alloc_node_data(int nid)
> > >
> > > node_data[nid] = nd;
> > > memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
> > > -
> > > - node_set_online(nid);
> > > }
> > >
> > > /**
> > > @@ -527,6 +525,19 @@ 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);
> > > @@ -570,7 +581,7 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
> > > return -EINVAL;
> > >
> > > /* Finally register nodes. */
> > > - for_each_node_mask(nid, node_possible_map) {
> > > + for_each_node(nid) {
> > > u64 start = PFN_PHYS(max_pfn);
> > > u64 end = 0;
> > >
> > > @@ -592,6 +603,10 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
> > > continue;
> > >
> > > alloc_node_data(nid);
> > > + if (!end)
> >
> > Here comes the bug, since !end can not reach here.
>
> You are right. I am dumb. I've just completely missed that. Sigh.
> Anyway, I think the code is more complicated than necessary and we can
> simply drop the check. I do not think we really have to worry about
> the start overflowing end. So the end patch should look as follows.
> Btw. I believe it is better to pull alloc_node_data out of init_memory_less_node
> because a) there is no need to duplicate the call and moreover we want
> to pull node_set_online as well. The code also seems cleaner this way.
>
I have no strong opinion here.
> Thanks for your testing and your patience with me here.
Np.
>
> diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
> index 1308f5408bf7..a5548fe668fb 100644
> --- a/arch/x86/mm/numa.c
> +++ b/arch/x86/mm/numa.c
> @@ -216,8 +216,6 @@ static void __init alloc_node_data(int nid)
>
> node_data[nid] = nd;
> memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
> -
> - node_set_online(nid);
> }
>
> /**
> @@ -527,6 +525,19 @@ 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);
> @@ -570,7 +581,7 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
> return -EINVAL;
>
> /* Finally register nodes. */
> - for_each_node_mask(nid, node_possible_map) {
> + for_each_node(nid) {
> u64 start = PFN_PHYS(max_pfn);
> u64 end = 0;
>
> @@ -581,9 +592,6 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
> end = max(mi->blk[i].end, end);
> }
>
> - if (start >= end)
> - continue;
> -
> /*
> * Don't confuse VM with a node that doesn't have the
> * minimum amount of memory:
> @@ -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);
> + else
> + node_set_online(nid);
> }
>
> /* Dump memblock with node info and return. */
> @@ -721,21 +733,6 @@ void __init x86_numa_init(void)
> numa_init(dummy_numa_init);
> }
>
> -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};
> -
> - /* Allocate and initialize node data. Memory-less node is now online.*/
> - alloc_node_data(nid);
> - 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.
> - */
> -}
> -
> /*
> * Setup early cpu_to_node.
> *
> @@ -763,9 +760,6 @@ void __init init_cpu_to_node(void)
> if (node == NUMA_NO_NODE)
> continue;
>
> - if (!node_online(node))
> - init_memory_less_node(node);
> -
> numa_set_node(cpu, node);
> }
> }
> --
Regret, it still has bug, and I got panic. Attached log.
Thanks,
Pingfan
[ 0.000000] Linux version 4.20.0-rc6+
[ 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 2095.918 MHz processor
[ 0.000066] last_pfn = 0x87f000 max_arch_pfn = 0x400000000
[ 0.006409] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
Memory KASLR using RDRAND RDTSC...
[ 0.016620] last_pfn = 0x70000 max_arch_pfn = 0x400000000
[ 0.027379] Using GB pages for direct mapping
[ 0.032009] Secure boot could not be determined
[ 0.036361] RAMDISK: [mem 0x87a172000-0x87cdfffff]
[ 0.041137] ACPI: Early table checksum verification disabled
[ 0.046766] ACPI: RSDP 0x000000006C527014 000024 (v02 DELL )
[ 0.052480] ACPI: XSDT 0x000000006C5260E8 0000C4 (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.060981] ACPI: FACP 0x000000006C516000 000114 (v06 DELL PE_SC3 00000002 DELL 00000001)
[ 0.069472] ACPI: DSDT 0x000000006C505000 00D302 (v02 DELL PE_SC3 00000002 DELL 00000001)
[ 0.077962] ACPI: FACS 0x000000006C2F1000 000040
[ 0.082556] ACPI: SSDT 0x000000006C525000 0000D2 (v02 DELL PE_SC3 00000002 MSFT 04000000)
[ 0.091051] ACPI: BERT 0x000000006C524000 000030 (v01 DELL BERT 00000001 DELL 00000001)
[ 0.099543] ACPI: HEST 0x000000006C523000 0006DC (v01 DELL HEST 00000001 DELL 00000001)
[ 0.108038] ACPI: SSDT 0x000000006C522000 0001C4 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.116532] ACPI: SRAT 0x000000006C521000 0002D0 (v03 DELL PE_SC3 00000001 AMD 00000001)
[ 0.125027] ACPI: MSCT 0x000000006C520000 0000A6 (v01 DELL PE_SC3 00000000 AMD 00000001)
[ 0.133519] ACPI: SLIT 0x000000006C51F000 00006C (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.142014] ACPI: CRAT 0x000000006C51C000 002210 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.150508] ACPI: CDIT 0x000000006C51B000 000068 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.159001] ACPI: SSDT 0x000000006C51A000 0003C6 (v02 DELL Tpm2Tabl 00001000 INTL 20170119)
[ 0.167495] ACPI: TPM2 0x000000006C519000 000038 (v04 DELL PE_SC3 00000002 DELL 00000001)
[ 0.175990] ACPI: EINJ 0x000000006C518000 000150 (v01 DELL PE_SC3 00000001 AMD 00000001)
[ 0.184484] ACPI: SLIC 0x000000006C517000 000024 (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.192976] ACPI: HPET 0x000000006C515000 000038 (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.201471] ACPI: APIC 0x000000006C514000 0004B2 (v03 DELL PE_SC3 00000002 DELL 00000001)
[ 0.209965] ACPI: MCFG 0x000000006C513000 00003C (v01 DELL PE_SC3 00000002 DELL 00000001)
[ 0.218458] ACPI: SSDT 0x000000006C504000 0005CA (v02 DELL xhc_port 00000001 INTL 20170119)
[ 0.226952] ACPI: IVRS 0x000000006C503000 000390 (v02 DELL PE_SC3 00000001 AMD 00000000)
[ 0.235447] ACPI: SSDT 0x000000006C501000 001658 (v01 AMD CPMCMN 00000001 INTL 20170119)
[ 0.244001] SRAT: PXM 0 -> APIC 0x00 -> Node 0
[ 0.248360] SRAT: PXM 0 -> APIC 0x01 -> Node 0
[ 0.252781] SRAT: PXM 0 -> APIC 0x08 -> Node 0
[ 0.257202] SRAT: PXM 0 -> APIC 0x09 -> Node 0
[ 0.261620] SRAT: PXM 1 -> APIC 0x10 -> Node 1
[ 0.266041] SRAT: PXM 1 -> APIC 0x11 -> Node 1
[ 0.270462] SRAT: PXM 1 -> APIC 0x18 -> Node 1
[ 0.274883] SRAT: PXM 1 -> APIC 0x19 -> Node 1
[ 0.279301] SRAT: PXM 2 -> APIC 0x20 -> Node 2
[ 0.283722] SRAT: PXM 2 -> APIC 0x21 -> Node 2
[ 0.288143] SRAT: PXM 2 -> APIC 0x28 -> Node 2
[ 0.292564] SRAT: PXM 2 -> APIC 0x29 -> Node 2
[ 0.296982] SRAT: PXM 3 -> APIC 0x30 -> Node 3
[ 0.301403] SRAT: PXM 3 -> APIC 0x31 -> Node 3
[ 0.305824] SRAT: PXM 3 -> APIC 0x38 -> Node 3
[ 0.310245] SRAT: PXM 3 -> APIC 0x39 -> Node 3
[ 0.314664] SRAT: PXM 4 -> APIC 0x40 -> Node 4
[ 0.319085] SRAT: PXM 4 -> APIC 0x41 -> Node 4
[ 0.323506] SRAT: PXM 4 -> APIC 0x48 -> Node 4
[ 0.327926] SRAT: PXM 4 -> APIC 0x49 -> Node 4
[ 0.332345] SRAT: PXM 5 -> APIC 0x50 -> Node 5
[ 0.336766] SRAT: PXM 5 -> APIC 0x51 -> Node 5
[ 0.341187] SRAT: PXM 5 -> APIC 0x58 -> Node 5
[ 0.345607] SRAT: PXM 5 -> APIC 0x59 -> Node 5
[ 0.350026] SRAT: PXM 6 -> APIC 0x60 -> Node 6
[ 0.354447] SRAT: PXM 6 -> APIC 0x61 -> Node 6
[ 0.358868] SRAT: PXM 6 -> APIC 0x68 -> Node 6
[ 0.363289] SRAT: PXM 6 -> APIC 0x69 -> Node 6
[ 0.367707] SRAT: PXM 7 -> APIC 0x70 -> Node 7
[ 0.372128] SRAT: PXM 7 -> APIC 0x71 -> Node 7
[ 0.376549] SRAT: PXM 7 -> APIC 0x78 -> Node 7
[ 0.380970] SRAT: PXM 7 -> APIC 0x79 -> Node 7
[ 0.385391] ACPI: SRAT: Node 1 PXM 1 [mem 0x00000000-0x0009ffff]
[ 0.391370] ACPI: SRAT: Node 1 PXM 1 [mem 0x00100000-0x7fffffff]
[ 0.397349] ACPI: SRAT: Node 1 PXM 1 [mem 0x100000000-0x47fffffff]
[ 0.403503] ACPI: SRAT: Node 5 PXM 5 [mem 0x480000000-0x87fffffff]
[ 0.409667] NUMA: Node 1 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0x7fffffff] -> [mem 0x00000000-0x7fffffff]
[ 0.419885] NUMA: Node 1 [mem 0x00000000-0x7fffffff] + [mem 0x100000000-0x47fffffff] -> [mem 0x00000000-0x47fffffff]
[ 0.430386] NODE_DATA(0) allocated [mem 0x87efd4000-0x87effefff]
[ 0.436352] NODE_DATA(0) on node 5
[ 0.440124] Initmem setup node 0 [mem 0x0000000000000000-0x0000000000000000]
[ 0.447104] NODE_DATA(1) allocated [mem 0x47ffd5000-0x47fffffff]
[ 0.453110] NODE_DATA(2) allocated [mem 0x87efa9000-0x87efd3fff]
[ 0.459060] NODE_DATA(2) on node 5
[ 0.462855] Initmem setup node 2 [mem 0x0000000000000000-0x0000000000000000]
[ 0.469809] NODE_DATA(3) allocated [mem 0x87ef7e000-0x87efa8fff]
[ 0.475788] NODE_DATA(3) on node 5
[ 0.479554] Initmem setup node 3 [mem 0x0000000000000000-0x0000000000000000]
[ 0.486536] NODE_DATA(4) allocated [mem 0x87ef53000-0x87ef7dfff]
[ 0.492518] NODE_DATA(4) on node 5
[ 0.496280] Initmem setup node 4 [mem 0x0000000000000000-0x0000000000000000]
[ 0.503266] NODE_DATA(5) allocated [mem 0x87ef28000-0x87ef52fff]
[ 0.509281] NODE_DATA(6) allocated [mem 0x87eefd000-0x87ef27fff]
[ 0.515224] NODE_DATA(6) on node 5
[ 0.518987] Initmem setup node 6 [mem 0x0000000000000000-0x0000000000000000]
[ 0.525974] NODE_DATA(7) allocated [mem 0x87eed2000-0x87eefcfff]
[ 0.531953] NODE_DATA(7) on node 5
[ 0.535716] Initmem setup node 7 [mem 0x0000000000000000-0x0000000000000000]
[ 0.542839] Reserving 500MB of memory at 384MB for crashkernel (System RAM: 32314MB)
[ 0.550465] Zone ranges:
[ 0.552927] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.559081] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.565235] Normal [mem 0x0000000100000000-0x000000087effffff]
[ 0.571388] Device empty
[ 0.574249] Movable zone start for each node
[ 0.578498] Early memory node ranges
[ 0.582049] node 1: [mem 0x0000000000001000-0x000000000008efff]
[ 0.588291] node 1: [mem 0x0000000000090000-0x000000000009ffff]
[ 0.594530] node 1: [mem 0x0000000000100000-0x000000005c3d6fff]
[ 0.600772] node 1: [mem 0x00000000643df000-0x0000000068ff7fff]
[ 0.607011] node 1: [mem 0x000000006c528000-0x000000006fffffff]
[ 0.613251] node 1: [mem 0x0000000100000000-0x000000047fffffff]
[ 0.619493] node 5: [mem 0x0000000480000000-0x000000087effffff]
[ 0.626479] Zeroed struct page in unavailable ranges: 46490 pages
[ 0.626480] Initmem setup node 1 [mem 0x0000000000001000-0x000000047fffffff]
[ 0.655261] Initmem setup node 5 [mem 0x0000000480000000-0x000000087effffff]
[ 0.663605] ACPI: PM-Timer IO Port: 0x408
[ 0.667459] ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
[ 0.673362] IOAPIC[0]: apic_id 128, version 33, address 0xfec00000, GSI 0-23
[ 0.680359] IOAPIC[1]: apic_id 129, version 33, address 0xfd880000, GSI 24-55
[ 0.687465] IOAPIC[2]: apic_id 130, version 33, address 0xea900000, GSI 56-87
[ 0.694571] IOAPIC[3]: apic_id 131, version 33, address 0xdd900000, GSI 88-119
[ 0.701766] IOAPIC[4]: apic_id 132, version 33, address 0xd0900000, GSI 120-151
[ 0.709048] IOAPIC[5]: apic_id 133, version 33, address 0xc3900000, GSI 152-183
[ 0.716328] IOAPIC[6]: apic_id 134, version 33, address 0xb6900000, GSI 184-215
[ 0.723609] IOAPIC[7]: apic_id 135, version 33, address 0xa9900000, GSI 216-247
[ 0.730888] IOAPIC[8]: apic_id 136, version 33, address 0x9c900000, GSI 248-279
[ 0.738167] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.744494] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
[ 0.750998] Using ACPI (MADT) for SMP configuration information
[ 0.756887] ACPI: HPET id: 0x10228201 base: 0xfed00000
[ 0.762007] smpboot: Allowing 128 CPUs, 96 hotplug CPUs
[ 0.767228] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.773614] PM: Registered nosave memory: [mem 0x0008f000-0x0008ffff]
[ 0.780029] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[ 0.786440] PM: Registered nosave memory: [mem 0x00100000-0x00100fff]
[ 0.792855] PM: Registered nosave memory: [mem 0x5c3d7000-0x643defff]
[ 0.799270] PM: Registered nosave memory: [mem 0x68ff8000-0x6b4f7fff]
[ 0.805681] PM: Registered nosave memory: [mem 0x6b4f8000-0x6c327fff]
[ 0.812095] PM: Registered nosave memory: [mem 0x6c328000-0x6c527fff]
[ 0.818510] PM: Registered nosave memory: [mem 0x70000000-0x8fffffff]
[ 0.824924] PM: Registered nosave memory: [mem 0x90000000-0xfec0ffff]
[ 0.831337] PM: Registered nosave memory: [mem 0xfec10000-0xfec10fff]
[ 0.837751] PM: Registered nosave memory: [mem 0xfec11000-0xfed7ffff]
[ 0.844165] PM: Registered nosave memory: [mem 0xfed80000-0xfed80fff]
[ 0.850579] PM: Registered nosave memory: [mem 0xfed81000-0xffffffff]
[ 0.856996] [mem 0x90000000-0xfec0ffff] available for PCI devices
[ 0.863060] Booting paravirtualized kernel on bare hardware
[ 0.868612] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
[ 0.994782] random: get_random_bytes called from start_kernel+0x9b/0x52e with crng_init=0
[ 1.002785] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:128 nr_cpu_ids:128 nr_node_ids:8
[ 1.011287] setup_percpu: cpu 0 has no node 0 or node-local memory
[ 1.017780] setup_percpu: cpu 1 has no node 4 or node-local memory
[ 1.029878] setup_percpu: cpu 4 has no node 2 or node-local memory
[ 1.036268] setup_percpu: cpu 5 has no node 6 or node-local memory
[ 1.042638] setup_percpu: cpu 6 has no node 3 or node-local memory
[ 1.049022] setup_percpu: cpu 7 has no node 7 or node-local memory
[ 1.058265] percpu: Embedded 46 pages/cpu @(____ptrval____) s151552 r8192 d28672 u262144
[ 1.066324] Built 2 zonelists, mobility grouping off. Total pages: 0
[ 1.072590] Policy zone: Normal
[ 1.075716] 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
[ 1.119510] Memory: 1333560K/33089944K available (12292K kernel code, 2066K rwdata, 3756K rodata, 2352K init, 6524K bss, 1202444K reserved, 0K cma-reserved)
[ 1.133390] swapper: page allocation failure: order:0, mode:0x4000(__GFP_COMP), nodemask=(null)
[ 1.141981] swapper cpuset=(null) mems_allowed=0-1023
[ 1.147012] CPU: 0 PID: 0 Comm: swapper Not tainted 4.20.0-rc6+ #6
[ 1.153161] Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS 1.4.3 06/29/2018
[ 1.160703] Call Trace:
[ 1.163145] dump_stack+0x5c/0x7b
[ 1.166429] warn_alloc+0xf5/0x180
[ 1.169809] ? __raw_callee_save___native_queued_spin_unlock+0x11/0x1e
[ 1.176305] __alloc_pages_slowpath+0x84f/0xa0d
[ 1.180815] ? pcpu_block_refresh_hint+0x77/0xa0
[ 1.185404] __alloc_pages_nodemask+0x299/0x2e0
[ 1.189916] new_slab+0x425/0x570
[ 1.193205] ___slab_alloc+0x375/0x540
[ 1.196935] ? bootstrap+0x1b/0xcb
[ 1.200313] ? __kmem_cache_create+0x2b/0x150
[ 1.204649] ? printk+0x58/0x6f
[ 1.207765] ? bootstrap+0x1b/0xcb
[ 1.211145] __slab_alloc+0x1c/0x38
[ 1.214613] kmem_cache_alloc+0x192/0x1c0
[ 1.218600] bootstrap+0x1b/0xcb
[ 1.221809] kmem_cache_init+0x8d/0x109
[ 1.225625] start_kernel+0x26c/0x52e
[ 1.229262] ? set_init_arg+0x55/0x55
[ 1.232904] secondary_startup_64+0xa4/0xb0
[ 1.237064] Mem-Info:
[ 1.239317] active_anon:0 inactive_anon:0 isolated_anon:0
[ 1.239317] active_file:0 inactive_file:0 isolated_file:0
[ 1.239317] unevictable:0 dirty:0 writeback:0 unstable:0
[ 1.239317] slab_reclaimable:0 slab_unreclaimable:2
[ 1.239317] mapped:0 shmem:0 pagetables:0 bounce:0
[ 1.239317] free:333388 free_pcp:0 free_cma:0
[ 1.269738] 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
[ 1.295132] 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
[ 1.320525] 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
[ 1.345920] lowmem_reserve[]: 0 0 0 0 0
[ 1.349735] 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
[ 1.375823] lowmem_reserve[]: 0 0 0 0 0
[ 1.379637] 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
[ 1.405724] lowmem_reserve[]: 0 0 0 0 0
[ 1.409539] 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
[ 1.435626] lowmem_reserve[]: 0 0 0 0 0
[ 1.439440] 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
[ 1.453482] 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
[ 1.468388] 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
[ 1.483211] 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
[ 1.498032] 0 total pagecache pages
[ 1.501501] 0 pages in swap cache
[ 1.504792] Swap cache stats: add 0, delete 0, find 0/0
[ 1.509992] Free swap = 0kB
[ 1.512852] Total swap = 0kB
[ 1.515713] 8272486 pages RAM
[ 1.518659] 0 pages HighMem/MovableOnly
[ 1.522473] 7939096 pages reserved
[ 1.525852] 0 pages cma reserved
[ 1.529059] 0 pages hwpoisoned
[ 1.532096] SLUB: Unable to allocate memory on node -1, gfp=0x408000(GFP_NOWAIT|__GFP_ZERO)
[ 1.540415] cache: kmem_cache, object size: 392, buffer size: 448, default order: 2, min order: 0
[ 1.549429] node 1: slabs: 0, objs: 0, free: 0
[ 1.554022] node 5: slabs: 0, objs: 0, free: 0
[ 1.558631] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
[ 1.566416] PGD 0 P4D 0
[ 1.568929] Oops: 0002 [#1] SMP NOPTI
[ 1.572571] CPU: 0 PID: 0 Comm: swapper Not tainted 4.20.0-rc6+ #6
[ 1.578724] Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS 1.4.3 06/29/2018
[ 1.586265] RIP: 0010:bootstrap+0x2e/0xcb
[ 1.590251] Code: ff 55 48 89 fd 48 8b 3d 95 c0 42 00 be 00 80 40 00 53 e8 4a c8 aa fe 48 89 c3 48 8b 05 80 c0 42 00 48 89 ee 48 89 df 8b 48 1c <f3> a4 65 8b 35 5e b8 45 56 48 89 df e8 e6 d6 aa fe 44 8b 05 47 6b
[ 1.608972] RSP: 0000:ffffffffa9603ed0 EFLAGS: 00010046
[ 1.614173] RAX: ffffffffa9ce6600 RBX: 0000000000000000 RCX: 0000000000000188
[ 1.621280] RDX: 00000000000001c0 RSI: ffffffffa9ce6600 RDI: 0000000000000000
[ 1.628387] RBP: ffffffffa9ce6600 R08: 000000006f6e2020 R09: 0000000000000147
[ 1.635494] R10: 202c30203a736261 R11: 6c73203a35206564 R12: ffffffffa9c2e900
[ 1.642601] R13: ffffffffa9c492c0 R14: 0000000000000000 R15: 0000000000000000
[ 1.649709] FS: 0000000000000000(0000) GS:ffff9b3c69c00000(0000) knlGS:0000000000000000
[ 1.657770] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.663488] CR2: 0000000000000000 CR3: 000000087e00a000 CR4: 00000000000406b0
[ 1.670598] Call Trace:
[ 1.673025] kmem_cache_init+0x8d/0x109
[ 1.676837] start_kernel+0x26c/0x52e
[ 1.680478] ? set_init_arg+0x55/0x55
[ 1.684118] secondary_startup_64+0xa4/0xb0
[ 1.688277] Modules linked in:
[ 1.691311] CR2: 0000000000000000
[ 1.694647] ---[ end trace 321632dadec2749b ]---
[ 1.699199] RIP: 0010:bootstrap+0x2e/0xcb
[ 1.703185] Code: ff 55 48 89 fd 48 8b 3d 95 c0 42 00 be 00 80 40 00 53 e8 4a c8 aa fe 48 89 c3 48 8b 05 80 c0 42 00 48 89 ee 48 89 df 8b 48 1c <f3> a4 65 8b 35 5e b8 45 56 48 89 df e8 e6 d6 aa fe 44 8b 05 47 6b
[ 1.721906] RSP: 0000:ffffffffa9603ed0 EFLAGS: 00010046
[ 1.727106] RAX: ffffffffa9ce6600 RBX: 0000000000000000 RCX: 0000000000000188
[ 1.734213] RDX: 00000000000001c0 RSI: ffffffffa9ce6600 RDI: 0000000000000000
[ 1.741320] RBP: ffffffffa9ce6600 R08: 000000006f6e2020 R09: 0000000000000147
[ 1.748427] R10: 202c30203a736261 R11: 6c73203a35206564 R12: ffffffffa9c2e900
[ 1.755534] R13: ffffffffa9c492c0 R14: 0000000000000000 R15: 0000000000000000
[ 1.762642] FS: 0000000000000000(0000) GS:ffff9b3c69c00000(0000) knlGS:0000000000000000
[ 1.770702] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.776423] CR2: 0000000000000000 CR3: 000000087e00a000 CR4: 00000000000406b0
[ 1.783531] Kernel panic - not syncing: Fatal exception
[ 1.788802] ---[ end Kernel panic - not syncing: Fatal exception ]---