Re: [git pull] x86 fixes

[Ingo Molnar]

* Torsten Kaiser <just.for.lkml@xxxxxxxxxxxxxx> wrote:

> On Sun, Jan 11, 2009 at 3:39 PM, Ingo Molnar <mingo@xxxxxxx> wrote:
> >
> > Linus,
> >
> > Please pull the latest x86-fixes-for-linus git tree from:
> >
> >   git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-fixes-for-linus
> >
> > out-of-topic modifications in x86-fixes-for-linus:
> > --------------------------------------------------
> > include/asm-generic/pgtable.h      # e104ba3: x86 PAT: change track_pfn_vma_new
> > mm/memory.c                        # e104ba3: x86 PAT: change track_pfn_vma_new
> >                                   # e61304a: x86 PAT: remove PFNMAP type on tr
> >
> >  Thanks,
> >
> >        Ingo
> >
> > ------------------>
> > Andi Kleen (2):
> >      x86: hpet: allow force enable on ICH10 HPET
> >      x86: avoid theoretical vmalloc fault loop
> >
> > Jaswinder Singh Rajput (1):
> >      x86: fix mpparse.c build error on latest git
> >
> > Kyle McMartin (1):
> >      x86, mtrr: fix types used in userspace exported header
> >
> > Suresh Siddha (1):
> >      x86, pat: fix reserve_memtype() for legacy 1MB range
> >
> > venkatesh.pallipadi@xxxxxxxxx (6):
> >      x86 PAT: remove PFNMAP type on track_pfn_vma_new() error
> >      x86 PAT: consolidate old memtype new memtype check into a function
> >      x86 PAT: change track_pfn_vma_new to take pgprot_t pointer param
> >      x86 PAT: return compatible mapping to remap_pfn_range callers
> >      x86 PAT: ioremap_wc should take resource_size_t parameter
> >      x86 PAT: remove CPA WARN_ON for zero pte
> 
> Something is (very) wrong with one(?) of these patches.
> 
> After upgrading from 2.6.28 to 2.6.29-rc1 I lost direct rendering.
> Each time I tried to start a program that uses DRM I get this in the
> syslog and the programm falls back to mesa software rendering:
> Jan 11 13:32:31 treogen [   77.167977] X:3280 map pfn expected mapping
> type uncached-min
> us for e0000000-e7ff8000, got write-combining
> Jan 11 13:32:31 treogen [   77.173620] X:3280 freeing invalid memtype
> e0000000-e7ff8000
> Jan 11 13:34:51 treogen [  217.861668] glxinfo:3492 map pfn expected
> mapping type uncach
> ed-minus for e0000000-e7ff8000, got write-combining
> Jan 11 13:34:51 treogen [  217.867220] glxinfo:3492 freeing invalid
> memtype e0000000-e7f
> f8000
> Jan 11 13:35:23 treogen [  249.771043] glxinfo:3494 map pfn expected
> mapping type uncach
> ed-minus for e0000000-e7ff8000, got write-combining
> Jan 11 13:35:23 treogen [  249.776589] glxinfo:3494 freeing invalid
> memtype e0000000-e7f
> f8000
> 
> Otherwise 2.6.29-rc1 worked for me. Even booting with 'fastboot' did
> not result in any problems, but it did cut the in-kernel-time down
> from ~12 sec to ~6 sec.
> 
> Hoping to fix this memtype problem I applied the patch from the pull
> request to 29-rc1 and rebooted. Now the system completely locks up
> when X is trying to start.
> Via serial console I got this Oops:
> [   79.500149] BUG: unable to handle kernel NULL pointer dereference
> at 0000000000000003
> [   79.509240] IP: [<0000000000000003>] 0x3
> [   79.510002] PGD 0
> [   79.510002] Oops: 0010 [#1] SMP
> [   79.510002] last sysfs file:
> /sys/devices/pci0000:00/0000:00:0f.0/0000:01:00.0/enable
> [   79.510002] CPU 0
> [   79.510002] Modules linked in: w83792d tuner tea5767 tda8290
> tuner_xc2028 xc5000 tda9887 tuner_simple tuner_types mt20xx tea5761
> tvaudio msp3400 bttv ir_common v4l2_common videodev v4l1_compat
> v4l2_compat_ioctl32 usbhid videobuf_dma_sg videobuf_core hid btcx_risc
> tveeprom sg pata_amd
> [   79.510002] Pid: 0, comm: swapper Not tainted 2.6.29-rc1 #2
> [   79.510002] RIP: 0010:[<0000000000000003>]  [<0000000000000003>] 0x3
> [   79.510002] RSP: 0018:ffffffff809a8b18  EFLAGS: 00010002
> [   79.510002] RAX: 0000000000000001 RBX: ffffffff00000000 RCX: 0000000000000000
> [   79.510002] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff809a8ca8
> [   79.510002] RBP: ffffffff809a8b18 R08: 0000000000000001 R09: 0000000000000100
> [   79.510002] R10: ffffffff8026af40 R11: 00000000000068d8 R12: 0000000000000000
> [   79.510002] R13: ffff88007e4fd700 R14: ffff880028018d00 R15: ffffffff809a8aa8
> [   79.510002] FS:  00007ff217e406f0(0000) GS:ffffffff809b1040(0000)
> knlGS:0000000000000000
> [   79.510002] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> [   79.510002] CR2: 0000000000000003 CR3: 0000000000201000 CR4: 00000000000006e0
> [   79.510002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [   79.510002] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
> [   79.510002] Process swapper (pid: 0, threadinfo ffffffff8087e000,
> task ffffffff807de360)
> [   79.510002] Stack:
> [   79.510002]  ffffffff809a8b68 ffffffff802389d7 0000000000000000
> ffffffff809a8b60
> [   79.510002]  0000000000000082 ffffffff8022a7a8 0000000000000000
> 0000000000000001
> [   79.510002]  0000000000000060 ffffffff807de360 ffffffff809a8b78
> ffffffff80238b7d
> [   79.510002] Call Trace:
> [   79.510002] Call Trace:
> [   79.510002]  <IRQ> <0> [<ffffffff802389d7>] try_to_wake_up+0x137/0x2d0
> [   79.510002]  [<ffffffff8022a7a8>] ? do_page_fault+0x368/0x970
> [   79.510002]  [<ffffffff80238b7d>] default_wake_function+0xd/0x10
> [   79.510002]  [<ffffffff8025a751>] autoremove_wake_function+0x11/0x40
> [   79.510002]  [<ffffffff804cc70f>] ? ata_scsi_qc_complete+0x1df/0x4c0
> [   79.510002]  [<ffffffff8065d1ef>] ? _spin_unlock_irqrestore+0x2f/0x40
> [   79.510002]  [<ffffffff8026b02c>] ?
> generic_smp_call_function_interrupt+0xec/0x100
> [   79.510002]  [<ffffffff8065cddd>] ? trace_hardirqs_off_thunk+0x3a/0x6c
> [   79.510002]  [<ffffffff8026af40>] ?
> generic_smp_call_function_interrupt+0x0/0x100
> [   79.510002]  [<ffffffff8026b02c>] ?
> generic_smp_call_function_interrupt+0xec/0x100
> [   79.510002]  [<ffffffff8065d54f>] ? page_fault+0x1f/0x30
> [   79.510002]  [<ffffffff8026b02c>] ?
> generic_smp_call_function_interrupt+0xec/0x100
> [   79.510002]  [<ffffffff8026af40>] ?
> generic_smp_call_function_interrupt+0x0/0x100
> [   79.510002]  [<ffffffff8024402c>] ? warn_slowpath+0x4c/0x130
> [   79.510002]  [<ffffffff804b8f85>] ? scsi_next_command+0x45/0x60
> [   79.510002]  [<ffffffff804b9bd6>] ? scsi_io_completion+0x376/0x4e0
> [   79.510002]  [<ffffffff804b2f6c>] ? scsi_finish_command+0xac/0xe0
> [   79.510002]  [<ffffffff804b9e08>] ? scsi_softirq_done+0xb8/0x140
> [   79.510002]  [<ffffffff8025d360>] ? __remove_hrtimer+0x40/0xa0
> [   79.510002]  [<ffffffff8026b02c>] ?
> generic_smp_call_function_interrupt+0xec/0x100
> [   79.510002]  [<ffffffff8021e54f>] ? smp_call_function_interrupt+0x1f/0x30
> [   79.510002]  [<ffffffff8020c863>] ? call_function_interrupt+0x13/0x20
> [   79.510002]  <EOI> <0>Code:  Bad RIP value.
> [   79.510002] RIP  [<0000000000000003>] 0x3
> [   79.510002]  RSP <ffffffff809a8b18>
> [   79.510002] CR2: 0000000000000003
> [   79.510002] ---[ end trace 99e686e29f771a49 ]---
> [   79.510002] Kernel panic - not syncing: Fatal exception in interrupt
> [   79.510002] ------------[ cut here ]------------

hm, that looks really nasty crash - Linus, you might want to defer this 
pull. The PAT folks Cc:-ed.

	Ingo
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