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Message-ID: <86802c440808202342l1e8eebcbuc92f13c6807dd186@mail.gmail.com> Date: Wed, 20 Aug 2008 23:42:03 -0700 From: "Yinghai Lu" <yhlu.kernel@...il.com> To: "David Witbrodt" <dawitbro@...global.net> Cc: "Ingo Molnar" <mingo@...e.hu>, "Vivek Goyal" <vgoyal@...hat.com>, "Bill Fink" <billfink@...dspring.com>, linux-kernel@...r.kernel.org, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, "Peter Zijlstra" <peterz@...radead.org>, "Thomas Gleixner" <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, netdev <netdev@...r.kernel.org> Subject: Re: HPET regression in 2.6.26 versus 2.6.25 -- found another user with the same regression On Wed, Aug 20, 2008 at 9:07 PM, David Witbrodt <dawitbro@...global.net> wrote: > > >> please apply attached patch to see if insert_resource/request resource >> works on your conf > > Yinghai, > > Please advise me on how you would like me to handle 2.6.27 kernels. > If I use your patch on 2.6.27-rc3, the message scroll off the 80x25 > screen before I can see them... and then the kernel hangs. I can run > the kernel with "hpet=disable", but I'm not sure you want that. If > you _do_ want that, just let me know. > > As an alternative, I can alter your patch to use a log level of > something lower, like KERN_WARNING. Then I could see the messages > from your patch if I set a "loglevel=4" boot parameter, even on a > kernel that hangs. The normal messages should disappear, only > leaving the messages from your patch. > > > In the meantime, here is what I _did_ do to test your patch: > > ================================== > $ git checkout -f v2.6.27-rc3 > HEAD is now at 30a2f3c... Linux 2.6.27-rc3 > > $ git apply --verbose --check ../yh_insert_resource_debug.patch > Checking patch kernel/resource.c... > > $ git apply --verbose ../yh_insert_resource_debug.patch > Checking patch kernel/resource.c... > Applied patch kernel/resource.c cleanly. > > $ git status > # Not currently on any branch. > # Changed but not updated: > # (use "git add <file>..." to update what will be committed) > # > # modified: kernel/resource.c > # > no changes added to commit (use "git add" and/or "git commit -a") > ================================== > > This kernel boots and hangs, and I cannot see your patch messages. But > I am sure they are there. (See below.) > > > To see your patch messages without altering the patch, I checked out > an older revision that will boot. Also, I just realized why I never get > the earliest boot log messages from 'dmesg': the standard value of > CONFIG_LOG_BUF_SHIFT is 15 (32 KB), which is too small to capture all > of my early boot messages. > > In view of these things, I checked out the last kernel that will run for > me without hanging, > > $ git checkout -f 700efc1b > > and set CONFIG_LOG_BUF_SHIFT=18. Your patch messages show up nicely this > way: > ================================== > $ uname -r > 2.6.25.test > > $ dmesg > Linux version 2.6.25.test (dawitbro@...eserver) (gcc version 4.3.1 (Debian 4.3.1-2) ) #1 SMP Wed Aug 20 23:31:39 EDT 2008 > Command line: root=/dev/hda1 ro video=uvesafb:1280x1024-16@60,mtrr:3 fbcon=scrollback:256k,font:10x18 debug > BIOS-provided physical RAM map: > BIOS-e820: 0000000000000000 - 000000000009f400 (usable) > BIOS-e820: 000000000009f400 - 00000000000a0000 (reserved) > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) > BIOS-e820: 0000000000100000 - 0000000077fe0000 (usable) > BIOS-e820: 0000000077fe0000 - 0000000077fe3000 (ACPI NVS) > BIOS-e820: 0000000077fe3000 - 0000000077ff0000 (ACPI data) > BIOS-e820: 0000000077ff0000 - 0000000078000000 (reserved) > BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) > BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) > Entering add_active_range(0, 0, 159) 0 entries of 3200 used > Entering add_active_range(0, 256, 491488) 1 entries of 3200 used > end_pfn_map = 1048576 > DMI 2.5 present. > ACPI: RSDP 000F7B80, 0024 (r2 RS690 ) > ACPI: RSDT 77FE3040, 0038 (r1 RS690 AWRDACPI 42302E31 AWRD 0) > ACPI: FACP 77FE30C0, 0074 (r1 RS690 AWRDACPI 42302E31 AWRD 0) > ACPI: DSDT 77FE3180, 4B0B (r1 RS690 AWRDACPI 1000 MSFT 3000000) > ACPI: FACS 77FE0000, 0040 > ACPI: SSDT 77FE7DC0, 028A (r1 PTLTD POWERNOW 1 LTP 1) > ACPI: HPET 77FE80C0, 0038 (r1 RS690 AWRDACPI 42302E31 AWRD 98) > ACPI: MCFG 77FE8140, 003C (r1 RS690 AWRDACPI 42302E31 AWRD 0) > ACPI: APIC 77FE7D00, 0068 (r1 RS690 AWRDACPI 42302E31 AWRD 0) > No NUMA configuration found > Faking a node at 0000000000000000-0000000077fe0000 > Entering add_active_range(0, 0, 159) 0 entries of 3200 used > Entering add_active_range(0, 256, 491488) 1 entries of 3200 used > Bootmem setup node 0 0000000000000000-0000000077fe0000 > NODE_DATA [000000000000c000 - 0000000000012fff] > bootmap [0000000000013000 - 0000000000021fff] pages f > early res: 0 [0-fff] BIOS data page > early res: 1 [6000-7fff] SMP_TRAMPOLINE > early res: 2 [200000-7b5387] TEXT DATA BSS > early res: 3 [9f000-aefff] EBDA > early res: 4 [8000-bfff] PGTABLE > [ffffe20000000000-ffffe200001fffff] PMD ->ffff810001200000 on node 0 > [ffffe20000200000-ffffe200003fffff] PMD ->ffff810001600000 on node 0 > [ffffe20000400000-ffffe200005fffff] PMD ->ffff810001a00000 on node 0 > [ffffe20000600000-ffffe200007fffff] PMD ->ffff810001e00000 on node 0 > [ffffe20000800000-ffffe200009fffff] PMD ->ffff810002200000 on node 0 > [ffffe20000a00000-ffffe20000bfffff] PMD ->ffff810002600000 on node 0 > [ffffe20000c00000-ffffe20000dfffff] PMD ->ffff810002a00000 on node 0 > [ffffe20000e00000-ffffe20000ffffff] PMD ->ffff810002e00000 on node 0 > [ffffe20001000000-ffffe200011fffff] PMD ->ffff810003200000 on node 0 > [ffffe20001200000-ffffe200013fffff] PMD ->ffff810003600000 on node 0 > [ffffe20001400000-ffffe200015fffff] PMD ->ffff810003a00000 on node 0 > [ffffe20001600000-ffffe200017fffff] PMD ->ffff810003e00000 on node 0 > [ffffe20001800000-ffffe200019fffff] PMD ->ffff810004200000 on node 0 > [ffffe20001a00000-ffffe20001bfffff] PMD ->ffff810004600000 on node 0 > Zone PFN ranges: > DMA 0 -> 4096 > DMA32 4096 -> 1048576 > Normal 1048576 -> 1048576 > Movable zone start PFN for each node > early_node_map[2] active PFN ranges > 0: 0 -> 159 > 0: 256 -> 491488 > On node 0 totalpages: 491391 > DMA zone: 56 pages used for memmap > DMA zone: 1486 pages reserved > DMA zone: 2457 pages, LIFO batch:0 > DMA32 zone: 6663 pages used for memmap > DMA32 zone: 480729 pages, LIFO batch:31 > Normal zone: 0 pages used for memmap > Movable zone: 0 pages used for memmap > ATI board detected. Disabling timer routing over 8254. > Detected use of extended apic ids on hypertransport bus > ACPI: PM-Timer IO Port: 0x4008 > ACPI: Local APIC address 0xfee00000 > ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) > Processor #0 (Bootup-CPU) > ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) > Processor #1 > ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) > ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) > ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) > IOAPIC[0]: apic_id 2, address 0xfec00000, GSI 0-23 > ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) > ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level) > ACPI: IRQ0 used by override. > ACPI: IRQ2 used by override. > ACPI: IRQ9 used by override. > Setting APIC routing to flat > ACPI: HPET id: 0x10b9a201 base: 0xfed00000 > Using ACPI (MADT) for SMP configuration information > insert_resource: parent: (PCI mem) [0, ffffffffffffffff], new: (Local APIC) [fee00000, fee00fff] > insert_resource: good with request direct parent: (PCI mem) [0, ffffffffffffffff], new: (Local APIC) [fee00000, fee00fff] > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (System RAM) [0, 9f3ff] conflict 0 > request_resource: root: (System RAM) [0, 9f3ff], new: (Kernel code) [200000, 557241] conflict 1 > request_resource: root: (System RAM) [0, 9f3ff], new: (Kernel data) [557242, 6b4397] conflict 1 > request_resource: root: (System RAM) [0, 9f3ff], new: (Kernel bss) [736000, 7b5387] conflict 1 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (reserved) [9f400, 9ffff] conflict 0 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (reserved) [f0000, fffff] conflict 0 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (System RAM) [100000, 77fdffff] conflict 0 > request_resource: root: (System RAM) [100000, 77fdffff], new: (Kernel code) [200000, 557241] conflict 0 > request_resource: root: (System RAM) [100000, 77fdffff], new: (Kernel data) [557242, 6b4397] conflict 0 > request_resource: root: (System RAM) [100000, 77fdffff], new: (Kernel bss) [736000, 7b5387] conflict 0 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (ACPI Non-volatile Storage) [77fe0000, 77fe2fff] conflict 0 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (ACPI Tables) [77fe3000, 77feffff] conflict 0 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (reserved) [77ff0000, 77ffffff] conflict 0 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (reserved) [e0000000, efffffff] conflict 0 > request_resource: root: (PCI mem) [0, ffffffffffffffff], new: (reserved) [fec00000, ffffffff] conflict 1 .. > insert_resource: parent: (PCI mem) [0, ffffffffffffffff], new: (HPET 0) [fed00000, fed003ff] > insert_resource: first: (0000:00:14.0) [fed00000, fed003ff], new: (HPET 0) [fed00000, fed003ff] > insert_resource: direct parent: (PCI mem) [0, ffffffffffffffff], new: (HPET 0) [fed00000, fed003ff] > insert_resource: child: (0000:00:14.0) [fed00000, fed003ff], new: (HPET 0) [fed00000, fed003ff] > insert_resource: parent: (PCI mem) [0, ffffffffffffffff], new: (IOAPIC 0) [fec00000, fec00fff] > insert_resource: first: (pnp 00:0d) [fec00000, fec00fff], new: (IOAPIC 0) [fec00000, fec00fff] > insert_resource: direct parent: (PCI mem) [0, ffffffffffffffff], new: (IOAPIC 0) [fec00000, fec00fff] > insert_resource: child: (pnp 00:0d) [fec00000, fec00fff], new: (IOAPIC 0) [fec00000, fec00fff] so old kernel doesn't register [fec00000, ffffffff] from e820 as reserved. because lapic address register at first. lapic, ioapic, and hpet0 addr all should be children of [fec00000, fffffffff] as reserved from e820. please use my print out patch with current kernel. YH -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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