[ kvm-Bugs-2847560 ] Guest hang with exhausted IRQ sources error if 8 VFs assigne

From: "SourceForge.net" <noreply@sourceforge.net>
To: noreply@sourceforge.net
Subject: [ kvm-Bugs-2847560 ] Guest hang with exhausted IRQ sources error if 8 VFs assigne
Date: Mon, 31 Aug 2009 05:58:07 +0000	[thread overview]
Message-ID: <E1Mhzu3-0007x8-7z@3bkjzd1.ch3.sourceforge.com> (raw)

Bugs item #2847560, was opened at 2009-08-30 22:58
Message generated for change (Tracker Item Submitted) made by jiajun
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Category: kernel
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jiajun Xu (jiajun)
Assigned to: Nobody/Anonymous (nobody)
Summary: Guest hang with exhausted IRQ sources error if 8 VFs assigne

Initial Comment:
Environment:
------------
Host OS (ia32/ia32e/IA64): ia32e
Guest OS (ia32/ia32e/IA64): ia32e 
Guest OS Type (Linux/Windows): Linux
kvm.git Commit: 779cc54dbccaa3a00d70a9d61d090be5d9ccc903
qemu-kvm Commit: 9e3269181e9bc56feb43bcd4e8ce0b82cd543e65
Host Kernel Version: 2.6.31-rc5
Hardware: NHM-EP

Bug detailed description:
--------------------------
If boot a guest with 8 VFs assigned, guest will hang at stage of "Starting
udev:". And dmesg will shows that "kvm: exhaust allocatable IRQ sources!"

If boot a guest with 6 VFs assigned, guest can boot up and VF can work well in
guest.

Dmesg info:
########
pci-stub 0000:01:10.0: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:0
pci-stub 0000:01:10.1: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:1
pci-stub 0000:01:10.2: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:2
pci-stub 0000:01:10.3: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:3
pci-stub 0000:01:10.4: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:4
pci-stub 0000:01:10.5: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:5
pci-stub 0000:01:10.6: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:6
pci-stub 0000:01:10.7: enabling device (0000 -> 0002)
assign device: host bdf = 1:10:7
pci-stub 0000:01:10.0: irq 91 for MSI/MSI-X
pci-stub 0000:01:10.0: irq 92 for MSI/MSI-X
pci-stub 0000:01:10.0: irq 93 for MSI/MSI-X
pci-stub 0000:01:10.1: irq 97 for MSI/MSI-X
pci-stub 0000:01:10.1: irq 98 for MSI/MSI-X
pci-stub 0000:01:10.1: irq 99 for MSI/MSI-X
pci-stub 0000:01:10.2: irq 100 for MSI/MSI-X
pci-stub 0000:01:10.2: irq 101 for MSI/MSI-X
pci-stub 0000:01:10.2: irq 102 for MSI/MSI-X
pci-stub 0000:01:10.3: irq 103 for MSI/MSI-X
pci-stub 0000:01:10.3: irq 104 for MSI/MSI-X
pci-stub 0000:01:10.3: irq 105 for MSI/MSI-X
pci-stub 0000:01:10.4: irq 106 for MSI/MSI-X
pci-stub 0000:01:10.4: irq 107 for MSI/MSI-X
pci-stub 0000:01:10.4: irq 108 for MSI/MSI-X
pci-stub 0000:01:10.5: irq 112 for MSI/MSI-X
pci-stub 0000:01:10.5: irq 113 for MSI/MSI-X
pci-stub 0000:01:10.5: irq 114 for MSI/MSI-X
pci-stub 0000:01:10.6: irq 115 for MSI/MSI-X
pci-stub 0000:01:10.6: irq 116 for MSI/MSI-X
pci-stub 0000:01:10.6: irq 117 for MSI/MSI-X
kvm: exhaust allocatable IRQ sources!
########

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2847560&group_id=180599