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Date: Mon, 9 Feb 2009 12:45:20 +0100 From: Ingo Molnar <mingo@...e.hu> To: "Maciej W. Rozycki" <macro@...ux-mips.org> Cc: Yinghai Lu <yinghai@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, Andrew Morton <akpm@...ux-foundation.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] x86: check_timer cleanup * Maciej W. Rozycki <macro@...ux-mips.org> wrote: > On Mon, 9 Feb 2009, Ingo Molnar wrote: > > > > Impact: remove extra unmask, and pair disable/enable > > > > > > for edge trigger io-apic routing, already unmasked via setup_IO_APIC_irq, > > > so don't unmask it again. > > > > > > also do call local_irq_disable() between timer_irq_works(), between it does call > > > local_irq_enable() inside. > > > also remove not needed apic version reading for 64bit > > > > > > Signed-off-by: Yinghai Lu <yinghai@...nel.org> > > > > > > --- > > > arch/x86/kernel/io_apic.c | 30 ++++++++++++++++++++++-------- > > > 1 file changed, 22 insertions(+), 8 deletions(-) > > > > applied to tip/x86/apic, thanks Yinghai. Maybe this even solves some of the spurious > > detection troubles we had in this code. > > I'll see if I can find time to look into it in details, but it looks > dodgy to me. The thing is setup_timer_IRQ0_pin() is special -- due to > line rerouting it may not necessarily be called for an input already set > up by setup_IO_APIC_irqs(). I recall keeping this mask set until ready > for a reason when doing the cleanup last year -- I think old code actually > used to do what the change now reintroduces. What's the reason of this > change? > > And timer_irq_works() used to restore the local interrupt mask within > itself -- perhaps it should be brought back rather than cluttering code > with local_irq_disable() calls throughout? > > What problems are you referring to, Ingo? Perhaps they should be looked > into specifically? I got a spurious boot failure on a 64-bi testbox: [ 0.280000] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 [ 0.296000] ..MP-BIOS bug: 8254 timer not connected to IO-APIC [ 0.296000] ...trying to set up timer (IRQ0) through the 8259A ... [ 0.296000] ..... (found apic 0 pin 2) ... [ 0.308000] ....... failed. [ 0.308000] ...trying to set up timer as Virtual Wire IRQ... [ 0.324000] ..... failed. [ 0.324000] ...trying to set up timer as ExtINT IRQ... [ 0.340000] ..... failed :(. [ 0.340000] Kernel panic - not syncing: IO-APIC + timer doesn't work! Boot with apic=debug and send a report. Then try booting with the 'noapic' option. Not reproducible. Full bootlog below. Ingo ---------------------------> [ 0.000000] Linux version 2.6.29-rc3-tip-01885-gf21daa4d-dirty (mingo@...a) (gcc version 4.2.3) #3 SMP Fri Feb 6 22:08:25 CET 2009 [ 0.000000] Command line: root=/dev/sda3 earlyprintk=serial,ttyS0,115200 console=ttyS0,115200 console=tty 3 profile=0 debug initcall_debug apic=debug apic=verbose ignore_loglevel sysrq_always_enabled highres=0 nmi_watchdog=0 nolapic_timer hpet=disable idle=mwait idle=poll highmem=512m nopat notsc pci=nomsi [ 0.000000] KERNEL supported cpus: [ 0.000000] Intel GenuineIntel [ 0.000000] AMD AuthenticAMD [ 0.000000] Centaur CentaurHauls [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) [ 0.000000] BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 000000007ffa0000 (usable) [ 0.000000] BIOS-e820: 000000007ffa0000 - 000000007ffae000 (ACPI data) [ 0.000000] BIOS-e820: 000000007ffae000 - 000000007ffe0000 (ACPI NVS) [ 0.000000] BIOS-e820: 000000007ffe0000 - 0000000080000000 (reserved) [ 0.000000] BIOS-e820: 00000000ffb80000 - 0000000100000000 (reserved) [ 0.000000] console [earlyser0] enabled [ 0.000000] debug: ignoring loglevel setting. [ 0.000000] using polling idle threads. [ 0.000000] DMI 2.3 present. [ 0.000000] last_pfn = 0x7ffa0 max_arch_pfn = 0x100000000 [ 0.000000] init_memory_mapping: 0000000000000000-000000007ffa0000 [ 0.000000] 0000000000 - 007fe00000 page 2M [ 0.000000] 007fe00000 - 007ffa0000 page 4k [ 0.000000] kernel direct mapping tables up to 7ffa0000 @ 8000-c000 [ 0.000000] last_map_addr: 7ffa0000 end: 7ffa0000 [ 0.000000] ACPI: RSDP 000FACD0, 0024 (r2 ACPIAM) [ 0.000000] ACPI: XSDT 7FFA0100, 0044 (r1 A M I OEMXSDT 10000630 MSFT 97) [ 0.000000] ACPI: FACP 7FFA0290, 00F4 (r3 A M I OEMFACP 10000630 MSFT 97) [ 0.000000] FADT: X_PM1a_EVT_BLK.bit_width (16) does not match PM1_EVT_LEN (4) [ 0.000000] ACPI: DSDT 7FFA0410, 8318 (r1 A0227 A0227000 0 INTL 2002026) [ 0.000000] ACPI: FACS 7FFAE000, 0040 [ 0.000000] ACPI: APIC 7FFA0390, 0080 (r1 A M I OEMAPIC 10000630 MSFT 97) [ 0.000000] ACPI: OEMB 7FFAE040, 0066 (r1 A M I AMI_OEM 10000630 MSFT 97) [ 0.000000] ACPI: MCFG 7FFA8730, 003C (r1 A M I OEMMCFG 10000630 MSFT 97) [ 0.000000] ACPI: Local APIC address 0xfee00000 [ 0.000000] No NUMA configuration found [ 0.000000] Faking a node at 0000000000000000-000000007ffa0000 [ 0.000000] Bootmem setup node 0 0000000000000000-000000007ffa0000 [ 0.000000] NODE_DATA [0000000000001000 - 0000000000004fff] [ 0.000000] bootmap [000000000000a000 - 0000000000019ff7] pages 10 [ 0.000000] (5 early reservations) ==> bootmem [0000000000 - 007ffa0000] [ 0.000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] [ 0.000000] #1 [0000006000 - 0000008000] TRAMPOLINE ==> [0000006000 - 0000008000] [ 0.000000] #2 [0000200000 - 0001866aac] TEXT DATA BSS ==> [0000200000 - 0001866aac] [ 0.000000] #3 [000009fc00 - 0000100000] BIOS reserved ==> [000009fc00 - 0000100000] [ 0.000000] #4 [0000008000 - 000000a000] PGTABLE ==> [0000008000 - 000000a000] [ 0.000000] Zone PFN ranges: [ 0.000000] DMA 0x00000000 -> 0x00001000 [ 0.000000] DMA32 0x00001000 -> 0x00100000 [ 0.000000] Normal 0x00100000 -> 0x00100000 [ 0.000000] Movable zone start PFN for each node [ 0.000000] early_node_map[2] active PFN ranges [ 0.000000] 0: 0x00000000 -> 0x0000009f [ 0.000000] 0: 0x00000100 -> 0x0007ffa0 [ 0.000000] On node 0 totalpages: 524095 [ 0.000000] DMA zone: 56 pages used for memmap [ 0.000000] DMA zone: 101 pages reserved [ 0.000000] DMA zone: 3842 pages, LIFO batch:0 [ 0.000000] DMA32 zone: 7111 pages used for memmap [ 0.000000] DMA32 zone: 512985 pages, LIFO batch:31 [ 0.000000] ACPI: PM-Timer IO Port: 0x808 [ 0.000000] ACPI: Local APIC address 0xfee00000 [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled) [ 0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) [ 0.000000] IOAPIC[0]: apic_id 2, version 0, address 0xfec00000, GSI 0-23 [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) [ 0.000000] ACPI: IRQ0 used by override. [ 0.000000] ACPI: IRQ2 used by override. [ 0.000000] ACPI: IRQ9 used by override. [ 0.000000] Using ACPI (MADT) for SMP configuration information [ 0.000000] SMP: Allowing 4 CPUs, 2 hotplug CPUs [ 0.000000] mapped APIC to ffffffffff5fc000 (fee00000) [ 0.000000] mapped IOAPIC to ffffffffff5fb000 (fec00000) [ 0.000000] Allocating PCI resources starting at 88000000 (gap: 80000000:7fb80000) [ 0.000000] NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:4 nr_node_ids:1 [ 0.000000] PERCPU: Allocating 77824 bytes of per cpu data [ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 516827 [ 0.000000] Policy zone: DMA32 [ 0.000000] Kernel command line: root=/dev/sda3 earlyprintk=serial,ttyS0,115200 console=ttyS0,115200 console=tty 3 profile=0 debug initcall_debug apic=debug apic=verbose ignore_loglevel sysrq_always_enabled highres=0 nmi_watchdog=0 nolapic_timer hpet=disable idle=mwait idle=poll highmem=512m nopat notsc pci=nomsi [ 0.000000] kernel profiling enabled (shift: 0) [ 0.000000] debug: sysrq always enabled. [ 0.000000] notsc: Kernel compiled with CONFIG_X86_TSC, cannot disable TSC completely. [ 0.000000] Initializing CPU#0 [ 0.000000] RCU-based detection of stalled CPUs is enabled. [ 0.000000] NR_IRQS:4352 nr_irqs:288 [ 0.000000] PID hash table entries: 4096 (order: 12, 32768 bytes) [ 0.000000] Fast TSC calibration using PIT [ 0.000000] Detected 3456.484 MHz processor. [ 0.000000] Console: colour VGA+ 80x25 [ 0.000000] console handover: boot [earlyser0] -> real [tty0] [ 0.000000] console [ttyS0] enabled [ 0.000000] Checking aperture... [ 0.000000] No AGP bridge found [ 0.000000] Calgary: detecting Calgary via BIOS EBDA area [ 0.000000] Calgary: Unable to locate Rio Grande table in EBDA - bailing! [ 0.000000] Memory: 1996352k/2096768k available (11972k kernel code, 388k absent, 100028k reserved, 7281k data, 796k init) [ 0.000000] SLUB: Genslabs=13, HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 [ 0.004000] Calibrating delay loop... 1724.41 BogoMIPS (lpj=3448832) [ 0.100000] Security Framework initialized [ 0.104000] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes) [ 0.112000] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes) [ 0.120000] Mount-cache hash table entries: 256 [ 0.124000] CPU: Trace cache: 12K uops, L1 D cache: 16K [ 0.128000] CPU: L2 cache: 2048K [ 0.132000] CPU 0/0x0 -> Node 0 [ 0.136000] CPU: CPU feature monitor disabled due to lack of CPUID level 0x5 [ 0.140000] CPU: Physical Processor ID: 0 [ 0.144000] CPU: Processor Core ID: 0 [ 0.152000] ACPI: Core revision 20081204 [ 0.196000] Setting APIC routing to flat [ 0.200000] enabled ExtINT on CPU#0 [ 0.200000] ENABLING IO-APIC IRQs [ 0.204000] init IO_APIC IRQs [ 0.208000] 2-0 (apicid-pin) not connected [ 0.212000] IOAPIC[0]: Set routing entry (2-1 -> 0x31 -> IRQ 1 Mode:0 Active:0) [ 0.216000] IOAPIC[0]: Set routing entry (2-2 -> 0x30 -> IRQ 0 Mode:0 Active:0) [ 0.220000] IOAPIC[0]: Set routing entry (2-3 -> 0x33 -> IRQ 3 Mode:0 Active:0) [ 0.224000] IOAPIC[0]: Set routing entry (2-4 -> 0x34 -> IRQ 4 Mode:0 Active:0) [ 0.228000] IOAPIC[0]: Set routing entry (2-5 -> 0x35 -> IRQ 5 Mode:0 Active:0) [ 0.232000] IOAPIC[0]: Set routing entry (2-6 -> 0x36 -> IRQ 6 Mode:0 Active:0) [ 0.236000] IOAPIC[0]: Set routing entry (2-7 -> 0x37 -> IRQ 7 Mode:0 Active:0) [ 0.240000] IOAPIC[0]: Set routing entry (2-8 -> 0x38 -> IRQ 8 Mode:0 Active:0) [ 0.244000] IOAPIC[0]: Set routing entry (2-9 -> 0x39 -> IRQ 9 Mode:1 Active:0) [ 0.248000] IOAPIC[0]: Set routing entry (2-10 -> 0x3a -> IRQ 10 Mode:0 Active:0) [ 0.252000] IOAPIC[0]: Set routing entry (2-11 -> 0x3b -> IRQ 11 Mode:0 Active:0) [ 0.256000] IOAPIC[0]: Set routing entry (2-12 -> 0x3c -> IRQ 12 Mode:0 Active:0) [ 0.260000] IOAPIC[0]: Set routing entry (2-13 -> 0x3d -> IRQ 13 Mode:0 Active:0) [ 0.264000] IOAPIC[0]: Set routing entry (2-14 -> 0x3e -> IRQ 14 Mode:0 Active:0) [ 0.268000] IOAPIC[0]: Set routing entry (2-15 -> 0x3f -> IRQ 15 Mode:0 Active:0) [ 0.272000] 2-16 2-17 2-18 2-19 2-20 2-21 2-22 2-23 (apicid-pin) not connected [ 0.280000] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 [ 0.296000] ..MP-BIOS bug: 8254 timer not connected to IO-APIC [ 0.296000] ...trying to set up timer (IRQ0) through the 8259A ... [ 0.296000] ..... (found apic 0 pin 2) ... [ 0.308000] ....... failed. [ 0.308000] ...trying to set up timer as Virtual Wire IRQ... [ 0.324000] ..... failed. [ 0.324000] ...trying to set up timer as ExtINT IRQ... [ 0.340000] ..... failed :(. [ 0.340000] Kernel panic - not syncing: IO-APIC + timer doesn't work! Boot with apic=debug and send a report. Then try booting with the 'noapic' option. [ 0.340000] [ 0.340000] Pid: 1, comm: swapper Not tainted 2.6.29-rc3-tip-01885-gf21daa4d-dirty #3 [ 0.340000] Call Trace: [ 0.340000] [<ffffffff8023da04>] panic+0xa0/0x157 [ 0.340000] [<ffffffff802239b4>] ? default_spin_lock_flags+0x9/0xd [ 0.340000] [<ffffffff80502c33>] ? delay_loop+0x23/0x2a [ 0.340000] [<ffffffff80502c55>] ? __delay+0xa/0xc [ 0.340000] [<ffffffff80502c93>] ? __const_udelay+0x3c/0x3e [ 0.340000] [<ffffffff814f0ec6>] setup_IO_APIC+0x7a6/0x7ec [ 0.340000] [<ffffffff802239b4>] ? default_spin_lock_flags+0x9/0xd [ 0.340000] [<ffffffff8021e377>] ? clear_IO_APIC_pin+0x64/0x6c [ 0.340000] [<ffffffff814ee410>] native_smp_prepare_cpus+0x263/0x2ce [ 0.340000] [<ffffffff814e7807>] kernel_init+0x5f/0x18c [ 0.340000] [<ffffffff8020d04a>] child_rip+0xa/0x20 [ 0.340000] [<ffffffff814e77a8>] ? kernel_init+0x0/0x18c [ 0.340000] [<ffffffff8020d040>] ? child_rip+0x0/0x20 [ 0.340000] ------------[ cut here ]------------ [ 0.340000] WARNING: at kernel/smp.c:329 smp_call_function_many+0x3e/0x1fe() [ 0.340000] Hardware name: System Product Name [ 0.340000] Pid: 1, comm: swapper Not tainted 2.6.29-rc3-tip-01885-gf21daa4d-dirty #3 [ 0.340000] Call Trace: [ 0.340000] [<ffffffff8023d936>] warn_slowpath+0xce/0xed [ 0.340000] [<ffffffff8020d040>] ? child_rip+0x0/0x20 [ 0.340000] [<ffffffff802239b4>] ? default_spin_lock_flags+0x9/0xd [ 0.340000] [<ffffffff8020f9d6>] ? printk_address+0x2c/0x2e [ 0.340000] [<ffffffff8020fddf>] ? print_trace_address+0x30/0x39 [ 0.340000] [<ffffffff8024e4b4>] ? __kernel_text_address+0x9/0x13 [ 0.340000] [<ffffffff8020fe64>] ? print_context_stack+0x4a/0xb6 [ 0.340000] [<ffffffff802239b4>] ? default_spin_lock_flags+0x9/0xd [ 0.340000] [<ffffffff8020eef7>] ? dump_trace+0x267/0x276 [ 0.340000] [<ffffffff80dad773>] ? mutex_trylock+0x19/0x39 [ 0.340000] [<ffffffff8025e90e>] ? crash_kexec+0xe8/0xf2 [ 0.340000] [<ffffffff802239b4>] ? default_spin_lock_flags+0x9/0xd [ 0.340000] [<ffffffff8025c83f>] smp_call_function_many+0x3e/0x1fe [ 0.340000] [<ffffffff80212d5a>] ? stop_this_cpu+0x0/0x2b [ 0.340000] [<ffffffff8023e09e>] ? release_console_sem+0x1ab/0x1b7 [ 0.340000] [<ffffffff8025ca1f>] smp_call_function+0x20/0x24 [ 0.340000] [<ffffffff8021c621>] native_smp_send_stop+0x22/0x45 [ 0.340000] [<ffffffff8023da18>] panic+0xb4/0x157 [ 0.340000] [<ffffffff802239b4>] ? default_spin_lock_flags+0x9/0xd [ 0.340000] [<ffffffff80502c33>] ? delay_loop+0x23/0x2a [ 0.340000] [<ffffffff80502c55>] ? __delay+0xa/0xc [ 0.340000] [<ffffffff80502c93>] ? __const_udelay+0x3c/0x3e [ 0.340000] [<ffffffff814f0ec6>] setup_IO_APIC+0x7a6/0x7ec [ 0.340000] [<ffffffff802239b4>] ? default_spin_lock_flags+0x9/0xd [ 0.340000] [<ffffffff8021e377>] ? clear_IO_APIC_pin+0x64/0x6c [ 0.340000] [<ffffffff814ee410>] native_smp_prepare_cpus+0x263/0x2ce [ 0.340000] [<ffffffff814e7807>] kernel_init+0x5f/0x18c [ 0.340000] [<ffffffff8020d04a>] child_rip+0xa/0x20 [ 0.340000] [<ffffffff814e77a8>] ? kernel_init+0x0/0x18c [ 0.340000] [<ffffffff8020d040>] ? child_rip+0x0/0x20 [ 0.340000] ---[ end trace a7919e7f17c0a725 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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