Re: agp/intel: can't ioremap flush page - no chipset flushing

From: Daniel Vetter
Date: Sat Feb 08 2014 - 19:02:35 EST

On Sat, Feb 8, 2014 at 9:22 PM, Paul Bolle <pebolle@xxxxxxxxxx> wrote:
> Daniel Vetter schreef op za 08-02-2014 om 20:59 [+0100]:
>> Hm, if this is really a regression between 3.13 and 3.14-rc1 then I
>> don't see any quick candidates - relevant functions in intel-gtt.c
>> seem unchanged.
>>
>> So probably a bisect is what we need here. Note that this could also
>> be due to resource handling changes in the driver/pci core, so you
>> can't restrict the bisect really.
>
> The last bisect on this machine took over 20 builds to pinpoint the
> offending commit. So that's bad news ...

Somehow we can't allocate the flush page resource any more, but I
don't have any idea what. There's nothing occupying the old spot (the
usual reason why resource management goes boom), so dunno why this
doesn't work any more. I think bisecting is the most fruitful avenue
here.
-Daniel


>
>> But before going down this route it
>> would be worth to check out the resource allocations of both kernels.
>> Can you please attach /proc/iomem for both 3.13 and 3.14-rc1
>
> The diff between /proc/iomem on v3.13.2 and v3.14-rc1 is:
> --- iomem-3.13.2 2014-02-08 21:14:30.214030591 +0100
> +++ iomem-3.14-rc1 2014-02-08 21:07:22.041189158 +0100
> @@ -11,16 +11,13 @@
> 000e0000-000effff : Extension ROM
> 000f0000-000fffff : System ROM
> 00100000-7f6dffff : System RAM
> - 00400000-009af63a : Kernel code
> - 009af63b-00c932ff : Kernel data
> - 00d4f000-00e4dfff : Kernel bss
> + 00400000-009c57bf : Kernel code
> + 009c57c0-00cb6aff : Kernel data
> + 00d78000-00e74fff : Kernel bss
> 7f6e0000-7f6f4fff : ACPI Tables
> 7f6f5000-7f6fffff : ACPI Non-volatile Storage
> 7f700000-7fffffff : reserved
> 7f800000-7fffffff : Graphics Stolen Memory
> -80000000-801fffff : PCI Bus 0000:02
> -80200000-8027ffff : 0000:00:02.1
> -80280000-80280fff : Intel Flush Page
> a0000000-a003ffff : 0000:00:02.0
> a0040000-a00403ff : 0000:00:1d.7
> a0040000-a00403ff : ehci_hcd
>
> /proc/iomem for v3.13.2:
> 00000000-00000fff : reserved
> 00001000-0009efff : System RAM
> 0009f000-0009ffff : reserved
> 000a0000-000bffff : Video RAM area
> 000c0000-000c7fff : Video ROM
> 000c8000-000cbfff : pnp 00:00
> 000cf800-000d3fff : reserved
> 000cf800-000d0dff : Adapter ROM
> 000d1000-000d1fff : Adapter ROM
> 000dc000-000fffff : reserved
> 000e0000-000effff : Extension ROM
> 000f0000-000fffff : System ROM
> 00100000-7f6dffff : System RAM
> 00400000-009af63a : Kernel code
> 009af63b-00c932ff : Kernel data
> 00d4f000-00e4dfff : Kernel bss
> 7f6e0000-7f6f4fff : ACPI Tables
> 7f6f5000-7f6fffff : ACPI Non-volatile Storage
> 7f700000-7fffffff : reserved
> 7f800000-7fffffff : Graphics Stolen Memory
> 80000000-801fffff : PCI Bus 0000:02
> 80200000-8027ffff : 0000:00:02.1
> 80280000-80280fff : Intel Flush Page
> a0000000-a003ffff : 0000:00:02.0
> a0040000-a00403ff : 0000:00:1d.7
> a0040000-a00403ff : ehci_hcd
> a0040400-a00404ff : 0000:00:1e.2
> a0040400-a00404ff : Intel ICH6
> a0040800-a00409ff : 0000:00:1e.2
> a0040800-a00409ff : Intel ICH6
> a0080000-a00fffff : 0000:00:02.0
> a0100000-a01fffff : PCI Bus 0000:02
> a0100000-a010ffff : 0000:02:00.0
> a0100000-a010ffff : tg3
> a0200000-afffffff : PCI Bus 0000:04
> a0200000-a0200fff : 0000:04:00.0
> a0200000-a0200fff : yenta_socket
> a0201000-a02010ff : 0000:04:00.1
> a0201000-a02010ff : mmc0
> a0202000-a0202fff : 0000:04:02.0
> a0202000-a0202fff : ipw2200
> a4000000-a7ffffff : PCI CardBus 0000:05
> c0000000-cfffffff : 0000:00:02.0
> d0000000-d7ffffff : PCI Bus 0000:04
> d0000000-d3ffffff : PCI CardBus 0000:05
> e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
> e0000000-efffffff : reserved
> e0000000-efffffff : pnp 00:01
> f0008000-f000bfff : reserved
> f0008000-f000bfff : pnp 00:01
> f000b410-f000b414 : iTCO_wdt
> f000b410-f000b414 : iTCO_wdt
> fec00000-fec0ffff : reserved
> fec00000-fec003ff : IOAPIC 0
> fed14000-fed19fff : reserved
> fed14000-fed17fff : pnp 00:01
> fed18000-fed18fff : pnp 00:01
> fed19000-fed19fff : pnp 00:01
> fed20000-fed8ffff : reserved
> fee00000-fee00fff : Local APIC
> fee00000-fee00fff : reserved
> ff000000-ffffffff : reserved
>
> /proc/iomem for v3.14-rc1:
> 00000000-00000fff : reserved
> 00001000-0009efff : System RAM
> 0009f000-0009ffff : reserved
> 000a0000-000bffff : Video RAM area
> 000c0000-000c7fff : Video ROM
> 000c8000-000cbfff : pnp 00:00
> 000cf800-000d3fff : reserved
> 000cf800-000d0dff : Adapter ROM
> 000d1000-000d1fff : Adapter ROM
> 000dc000-000fffff : reserved
> 000e0000-000effff : Extension ROM
> 000f0000-000fffff : System ROM
> 00100000-7f6dffff : System RAM
> 00400000-009c57bf : Kernel code
> 009c57c0-00cb6aff : Kernel data
> 00d78000-00e74fff : Kernel bss
> 7f6e0000-7f6f4fff : ACPI Tables
> 7f6f5000-7f6fffff : ACPI Non-volatile Storage
> 7f700000-7fffffff : reserved
> 7f800000-7fffffff : Graphics Stolen Memory
> a0000000-a003ffff : 0000:00:02.0
> a0040000-a00403ff : 0000:00:1d.7
> a0040000-a00403ff : ehci_hcd
> a0040400-a00404ff : 0000:00:1e.2
> a0040400-a00404ff : Intel ICH6
> a0040800-a00409ff : 0000:00:1e.2
> a0040800-a00409ff : Intel ICH6
> a0080000-a00fffff : 0000:00:02.0
> a0100000-a01fffff : PCI Bus 0000:02
> a0100000-a010ffff : 0000:02:00.0
> a0100000-a010ffff : tg3
> a0200000-afffffff : PCI Bus 0000:04
> a0200000-a0200fff : 0000:04:00.0
> a0200000-a0200fff : yenta_socket
> a0201000-a02010ff : 0000:04:00.1
> a0201000-a02010ff : mmc0
> a0202000-a0202fff : 0000:04:02.0
> a0202000-a0202fff : ipw2200
> a4000000-a7ffffff : PCI CardBus 0000:05
> c0000000-cfffffff : 0000:00:02.0
> d0000000-d7ffffff : PCI Bus 0000:04
> d0000000-d3ffffff : PCI CardBus 0000:05
> e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
> e0000000-efffffff : reserved
> e0000000-efffffff : pnp 00:01
> f0008000-f000bfff : reserved
> f0008000-f000bfff : pnp 00:01
> f000b410-f000b414 : iTCO_wdt
> f000b410-f000b414 : iTCO_wdt
> fec00000-fec0ffff : reserved
> fec00000-fec003ff : IOAPIC 0
> fed14000-fed19fff : reserved
> fed14000-fed17fff : pnp 00:01
> fed18000-fed18fff : pnp 00:01
> fed19000-fed19fff : pnp 00:01
> fed20000-fed8ffff : reserved
> fee00000-fee00fff : Local APIC
> fee00000-fee00fff : reserved
> ff000000-ffffffff : reserved
>
> Thanks,
>
>
> Paul Bolle
>



--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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