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Date: Tue, 9 Nov 2010 21:32:45 +0100 From: Maciej Rutecki <maciej.rutecki@...il.com> To: Borislav Petkov <bp@...64.org> Cc: Bjorn Helgaas <bjorn.helgaas@...com>, Jesse Barnes <jbarnes@...tuousgeek.org>, Andreas Herrmann <andreas.herrmann3@....com>, Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>, Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org> Subject: Re: AMD boot freeze bisected to b126b4703afa4010b161784a43650337676dd03b I created a Bugzilla entry at https://bugzilla.kernel.org/show_bug.cgi?id=22552 for your bug report, please add your address to the CC list in there, thanks! On wtorek, 2 listopada 2010 o 18:03:35 Borislav Petkov wrote: > Hi Bjorn, > > I am testing 37-rc1 on a quad-socket MCM system (48 cores) and it > freezes during boot with the messages below: > > ... > [ 5.590748] pnp: PnP ACPI: found 14 devices > [ 5.595386] ACPI: ACPI bus type pnp unregistered > [ 5.600412] system 00:01: [mem 0xe0000000-0xefffffff] has been reserved > [ 5.607422] system 00:01: [mem 0xfec00000-0xfec00fff] could not be > reserved [ 5.614772] system 00:01: [mem 0xfee00000-0xfee00fff] has been > reserved [ 5.621773] system 00:01: [mem 0xc8000000-0xc8007fff] could > not be reserved [ 5.629129] system 00:08: [io 0x0220-0x022f] has been > reserved [ 5.635432] system 00:08: [io 0x040b] has been reserved > [ 5.641125] system 00:08: [io 0x04d0-0x04d1] has been reserved > [ 5.647427] system 00:08: [io 0x04d6] has been reserved > [ 5.653123] system 00:08: [io 0x0530-0x0537] has been reserved > [ 5.659433] system 00:08: [io 0x0c00-0x0c01] has been reserved > [ 5.665742] system 00:08: [io 0x0c14] has been reserved > [ 5.671439] system 00:08: [io 0x0c50-0x0c52] has been reserved > [ 5.677744] system 00:08: [io 0x0c6c] has been reserved > [ 5.683438] system 00:08: [io 0x0c6f] has been reserved > [ 5.689134] system 00:08: [io 0x0ca0-0x0caf] has been reserved > [ 5.695434] system 00:08: [io 0x0cd0-0x0cd1] has been reserved > [ 5.701744] system 00:08: [io 0x0cd2-0x0cd3] has been reserved > [ 5.708055] system 00:08: [io 0x0cd4-0x0cd5] has been reserved > [ 5.714364] system 00:08: [io 0x0cd6-0x0cd7] has been reserved > [ 5.720664] system 00:08: [io 0x0cd8-0x0cdf] has been reserved > [ 5.726965] system 00:08: [io 0x2000-0x205f] has been reserved > [ 5.733268] system 00:08: [io 0x2100-0x21ff window] has been reserved > [ 5.740184] system 00:08: [io 0x2200-0x22ff window] has been reserved > [ 5.747099] system 00:08: [io 0x0f40-0x0f47] has been reserved > [ 5.753402] system 00:08: [io 0x087f] has been reserved > [ 5.759101] system 00:09: [mem 0xfff00000-0xffffffff] has been reserved > [ 5.766100] system 00:09: [mem 0xfec10000-0xfec1001f] has been reserved > [ 5.773106] system 00:0d: [mem 0xd8000000-0xd8007fff] could not be > reserved [ 5.802579] pci 0000:00:04.0: BAR 9: assigned [mem > 0xc9e00000-0xc9ffffff pref] [ 5.810513] pci 0000:00:03.0: BAR 9: > assigned [mem 0xc9d00000-0xc9dfffff pref] [ 5.818433] pci 0000:01:00.0: > BAR 6: assigned [mem 0xc9dc0000-0xc9dfffff pref] [ 5.826354] pci > 0000:00:03.0: PCI bridge to [bus 01-01] > [ 5.831962] pci 0000:00:03.0: bridge window [io 0x3000-0x3fff] > [ 5.838446] pci 0000:00:03.0: bridge window [mem > 0xc8100000-0xc81fffff] [ 5.845624] pci 0000:00:03.0: bridge window > [mem 0xc9d00000-0xc9dfffff pref] [ 5.853547] pci 0000:02:00.0: BAR 6: > assigned [mem 0xc9e00000-0xc9ffffff pref] [ 5.861465] pci 0000:00:04.0: > PCI bridge to [bus 02-02] > [ 5.867075] pci 0000:00:04.0: bridge window [io 0x4000-0x4fff] > [ 5.873558] pci 0000:00:04.0: bridge window [mem > 0xc8200000-0xc82fffff] [ 5.880732] pci 0000:00:04.0: bridge window > [mem 0xc9e00000-0xc9ffffff pref] [ 5.888649] pci 0000:00:09.0: PCI > bridge to [bus 03-03] > [ 5.894260] pci 0000:00:09.0: bridge window [io disabled] > [ 5.900304] pci 0000:00:09.0: bridge window [mem > 0xca000000-0xcdffffff] [ 5.907480] pci 0000:00:09.0: bridge window > [mem pref disabled] <EOF> > > > > > Bisecting the kernel gave the following results and reverting > b126b4703afa4010b161784a43650337676dd03b does really fix booting. Let me > know what info you'd need/patches tested for debugging this. > > Thanks. > > b126b4703afa4010b161784a43650337676dd03b is the first bad commit > commit b126b4703afa4010b161784a43650337676dd03b > Author: Bjorn Helgaas <bjorn.helgaas@...com> > Date: Tue Oct 26 15:41:39 2010 -0600 > > PCI: allocate bus resources from the top down > > Allocate space from the highest-address PCI bus resource first, then > work downward. > > Previously, we looked for space in PCI host bridge windows in the order > we discovered the windows. For example, given the following windows > (discovered via an ACPI _CRS method): > > pci_root PNP0A03:00: host bridge window [mem 0x000a0000-0x000bffff] > pci_root PNP0A03:00: host bridge window [mem 0x000c0000-0x000effff] > pci_root PNP0A03:00: host bridge window [mem 0x000f0000-0x000fffff] > pci_root PNP0A03:00: host bridge window [mem 0xbff00000-0xf7ffffff] > pci_root PNP0A03:00: host bridge window [mem 0xff980000-0xff980fff] > pci_root PNP0A03:00: host bridge window [mem 0xff97c000-0xff97ffff] > pci_root PNP0A03:00: host bridge window [mem 0xfed20000-0xfed9ffff] > > we attempted to allocate from [mem 0x000a0000-0x000bffff] first, then > [mem 0x000c0000-0x000effff], and so on. > > With this patch, we allocate from [mem 0xff980000-0xff980fff] first, > then [mem 0xff97c000-0xff97ffff], [mem 0xfed20000-0xfed9ffff], etc. > > Allocating top-down follows Windows practice, so we're less likely to > trip over BIOS defects in the _CRS description. > > On the machine above (a Dell T3500), the [mem 0xbff00000-0xbfffffff] > region doesn't actually work and is likely a BIOS defect. The symptom is > that we move the AHCI controller to 0xbff00000, which leads to "Boot has > failed, sleeping forever," a BUG in ahci_stop_engine(), or some other boot > failure. > > Reference: https://bugzilla.kernel.org/show_bug.cgi?id=16228#c43 > Reference: https://bugzilla.redhat.com/show_bug.cgi?id=620313 > Reference: https://bugzilla.redhat.com/show_bug.cgi?id=629933 > Reported-by: Brian Bloniarz <phunge0@...mail.com> > Reported-and-tested-by: Stefan Becker <chemobejk@...il.com> > Reported-by: Denys Vlasenko <dvlasenk@...hat.com> > Signed-off-by: Bjorn Helgaas <bjorn.helgaas@...com> > Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org> > > :040000 040000 234ddafeeb942c78dbfc36825706c00cc5c9a06f > :a6beefdad2b794afd9ddef066664afa695afc5eb M drivers -- Maciej Rutecki http://www.maciek.unixy.pl -- 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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