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On 22.04.15 at 22:30, wrote: Booting opensuse 13.2 to

uname -rm 3.19.4-1.g74c332b-xen x86_64

I notice in the boot logs

dmesg | grep -i " pci " | egrep "fail|space" [ 0.338499] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.338500] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338501] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.338502] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338505] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.338506] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338507] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.338508] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000]

Is this indeed only happening under Xen? If so, the difference to the native case would need to be investigated (i.e. open a bug, attaching the _full_ boot log of the kernel and hypervisor). If not, perhaps there's a BIOS setup option allowing more space for the needed MMIO ranges? Also without the full log it's hard to tell whether these are legitimate failures (taking into consideration the allocation strategy of the kernel), indications of bugs, or indications of that strategy needing improvement.

added 'pci=realloc'

cat /proc/cmdline root=... pci=realloc

recreated initrd & rebooted.

Unfortunately, it made it worse.

dmesg | grep -i " pci " | egrep "fail|space" [ 0.338475] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.338476] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338477] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.338478] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000] [...] What are these errors, and what's a fix, if not the 'pci=realloc'?

That's a hint at there indeed not being enough MMIO space, or the kernel not (always) falling back to using 64-bit address ranges when short on 32-bit ones. But again - nothing specific can be said without seeing the full log. And also again it should be made clear whether this is a problem with _only_ the Xen kernel. Jan -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org

lyndat3@your-mail.com wrote:

Booting opensuse 13.2 to

uname -rm 3.19.4-1.g74c332b-xen x86_64

I notice in the boot logs

dmesg | grep -i " pci " | egrep "fail|space" [ 0.338499] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.338500] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338501] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.338502] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338505] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.338506] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338507] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.338508] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000]

Found mention of that error

"PCI Out of Resources" http://permalink.gmane.org/gmane.linux.kernel.pci/40845

What problem/error conditions are caused by the above messages? I get similar messages, but I don't think they are causing a problem, but are the result of linux using the PnP algorithm to try assigning different 'sets' of resources to PnP HW. It seems there are some number of "fixed" PnP combinations that can work. Sometime after my 1st BAR message, I see a blurb: [ 1.156142] ACPI: PCI Interrupt Link [LK00] (IRQs 3 4 5 6 7 10 11 14 *15) [ 1.163763] ACPI: PCI Interrupt Link [LK01] (IRQs 3 4 5 6 7 10 11 *14 15) [ 1.171458] ACPI: PCI Interrupt Link [LK02] (IRQs 3 4 5 6 7 10 *11 14 15) [ 1.179075] ACPI: PCI Interrupt Link [LK03] (IRQs 3 4 5 6 7 *10 11 14 15) [ 1.186681] ACPI: PCI Interrupt Link [LK04] (IRQs 3 4 *5 6 7 10 11 14 15) [ 1.194310] ACPI: PCI Interrupt Link [LK05] (IRQs 3 4 5 *6 7 10 11 14 15) [ 1.201915] ACPI: PCI Interrupt Link [LK06] (IRQs 3 4 5 6 7 10 11 14 15) *0, disabled. [ 1.210780] ACPI: PCI Interrupt Link [LK07] (IRQs 3 4 *5 6 7 10 11 14 15) ---- Which looks like it may be a list of possible arrangements associated with PnP HW. My BAR message are a bit more varied than yours: [ 1.044018] pci 0000:00:1f.0: can't claim BAR 13 [io 0x0800-0x087f]: address conflict with ACPI CPU throttle [io 0x0810-0x0815] [ 1.494878] pci 0000:05:00.1: can't claim BAR 6 [mem 0xdf200000-0xdf27ffff pref]: address conflict with 0000:05:00.0 [mem 0xdf200000-0xdf27ffff pref] [ 1.508547] pci 0000:00:1f.0: BAR 13: [io 0x0800-0x087f] has bogus alignment [ 1.551438] pci 0000:05:00.1: BAR 6: assigned [mem 0xdf280000-0xdf2fffff pref] [ 1.558814] pci 0000:05:00.0: BAR 7: no space for [mem size 0x00100000 64bit] [ 1.566093] pci 0000:05:00.0: BAR 7: failed to assign [mem size 0x00100000 64bit] [ 1.573730] pci 0000:05:00.0: BAR 10: no space for [mem size 0x00100000 64bit] [ 1.581099] pci 0000:05:00.0: BAR 10: failed to assign [mem size 0x00100000 64bit] [ 1.588817] pci 0000:05:00.1: BAR 7: no space for [mem size 0x00100000 64bit] [ 1.596097] pci 0000:05:00.1: BAR 7: failed to assign [mem size 0x00100000 64bit] [ 1.603731] pci 0000:05:00.1: BAR 10: no space for [mem size 0x00100000 64bit] [ 1.611097] pci 0000:05:00.1: BAR 10: failed to assign [mem size 0x00100000 64bit] [ 1.680278] pci 0000:08:03.0: BAR 6: assigned [mem 0xde000000-0xde00ffff pref] [ 1.715645] pci 0000:00:1f.0: BAR 13: [io 0x0800-0x087f] has bogus alignment [ 1.722909] pci 0000:00:05.0: BAR 14: assigned [mem 0xc0000000-0xc04fffff] [ 1.765564] pci 0000:05:00.0: BAR 6: assigned [mem 0xc0000000-0xc007ffff pref] [ 1.772920] pci 0000:05:00.1: BAR 6: assigned [mem 0xc0080000-0xc00fffff pref] [ 1.780277] pci 0000:05:00.0: BAR 7: assigned [mem 0xc0100000-0xc01fffff 64bit] [ 1.787737] pci 0000:05:00.0: BAR 10: assigned [mem 0xc0200000-0xc02fffff 64bit] [ 1.795275] pci 0000:05:00.1: BAR 7: assigned [mem 0xc0300000-0xc03fffff 64bit] [ 1.802734] pci 0000:05:00.1: BAR 10: assigned [mem 0xc0400000-0xc04fffff 64bit] --- At the end of the failure messages appears to be several 'assigned' messages which I took to mean those were successful and it continued. In my BIOS there was also a setting for PnP that allowed me to try different orders or disable some. I tried changing that once, and the above error list got a bit longer, but still finished. Maybe your bios has such a setting? Either that or try taking out any optional equipment from your computer (have you added any new HW recently?).. good luck....?

added 'pci=realloc'

cat /proc/cmdline root=... pci=realloc

recreated initrd & rebooted.

Unfortunately, it made it worse.

dmesg | grep -i " pci " | egrep "fail|space" [ 0.338475] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.338476] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.338477] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.338478] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.339172] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.339173] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.339174] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.339175] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.339845] pci 0000:06:04.0: BAR 14: no space for [mem size 0x00500000] [ 0.339846] pci 0000:06:04.0: BAR 14: failed to assign [mem size 0x00500000] [ 0.339874] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.339875] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.339876] pci 0000:08:00.0: BAR 0: no space for [mem size 0x00004000] [ 0.339877] pci 0000:08:00.0: BAR 0: failed to assign [mem size 0x00004000] [ 0.339878] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.339879] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.340596] pci 0000:05:00.0: BAR 14: no space for [mem size 0x00800000] [ 0.340597] pci 0000:05:00.0: BAR 14: failed to assign [mem size 0x00800000] [ 0.340599] pci 0000:06:04.0: BAR 14: no space for [mem size 0x00500000] [ 0.340600] pci 0000:06:04.0: BAR 14: failed to assign [mem size 0x00500000] [ 0.340601] pci 0000:06:07.0: BAR 14: no space for [mem size 0x00100000] [ 0.340602] pci 0000:06:07.0: BAR 14: failed to assign [mem size 0x00100000] [ 0.340603] pci 0000:06:09.0: BAR 14: no space for [mem size 0x00200000] [ 0.340604] pci 0000:06:09.0: BAR 14: failed to assign [mem size 0x00200000] [ 0.340632] pci 0000:08:00.0: BAR 14: no space for [mem size 0x00400000] [ 0.340633] pci 0000:08:00.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.340634] pci 0000:09:01.0: BAR 14: no space for [mem size 0x00400000] [ 0.340635] pci 0000:09:01.0: BAR 14: failed to assign [mem size 0x00400000] [ 0.340804] pci 0000:0d:00.0: BAR 0: no space for [mem size 0x00002000 64bit] [ 0.340805] pci 0000:0d:00.0: BAR 0: failed to assign [mem size 0x00002000 64bit] [ 0.340832] pci 0000:0e:00.0: BAR 14: no space for [mem size 0x00100000] [ 0.340833] pci 0000:0e:00.0: BAR 14: failed to assign [mem size 0x00100000] [ 0.340834] pci 0000:0e:00.0: BAR 1: no space for [mem size 0x00001000] [ 0.340835] pci 0000:0e:00.0: BAR 1: failed to assign [mem size 0x00001000] [ 0.340837] pci 0000:0f:00.0: BAR 1: no space for [mem size 0x00004000] [ 0.340838] pci 0000:0f:00.0: BAR 1: failed to assign [mem size 0x00004000] [ 0.340839] pci 0000:0f:00.0: BAR 0: no space for [mem size 0x00000800] [ 0.340840] pci 0000:0f:00.0: BAR 0: failed to assign [mem size 0x00000800]

What are these errors, and what's a fix, if not the 'pci=realloc'?

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