Bugs item #2104487, was opened at 2008-09-10 18:07
Message generated for change (Comment added) made by sh0nx
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Category: intel
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Shawn starr (sh0nx)
Assigned to: Nobody/Anonymous (nobody)
Summary: Soft lockups when installing RHEL5 over PXE

Initial Comment:
CPU Type: 
=========

Family: 15
Model: 6
Stepping: 2
model name: Intel(R) Pentium(R) D CPU 3.00GHz

This CPU has VT extensions

Steps to reproduce (you may need to retry a few times to trigger this to fail)

1) Try to install RHEL 5.1 64bit guest with a PXE installation. Not using any 
virtio drivers.

2) Sometimes when trying to format a disk CPU gets stuck, install hangs but the 
vm is still responsive to 
control (reboot, etc)

3) I have a 32bit Windows XP VM running also with kvm 

* Note: If it doesn't soft lockup, on reboot into the newly installed VM, 
ssh-keygen segfaults (this has happened 3 times).

KVM version: (kvm 75 snapshot)

[ 1489.698357] loaded kvm module (kvm-snapshot-20080909)

RHEL5 64bit GUEST Crash Output:
===============================

<3>BUG: soft lockup - CPU#0 stuck for 10s! [mke2fs:573]
<4>CPU 0:
<4>Modules linked in: dm_emc dm_round_robin dm_multipath dm_snapshot dm_mirror 
dm_zero dm_mod lock_nolock gfs2 ext3 jbd msdos raid456 xor raid1 raid0 ata_piix 
libata 8139cp mii uhci_hcd iscsi_ibft iscsi_tcp libiscsi scsi_transport_iscsi 
sr_mod sd_mod scsi_mod ide_cd cdrom squashfs pcspkr edd floppy loop nfs nfs_acl 
fscache lockd sunrpc vfat fat cramfs
<4>Pid: 573, comm: mke2fs Not tainted 2.6.18-92.el5 #1
<4>RIP: 0010:[<ffffffff80011ec7>]  [<ffffffff80011ec7>] __do_softirq+0x53/0xd6
<4>RSP: 0018:ffffffff80416f60  EFLAGS: 00000206
<4>RAX: 0000000000000002 RBX: ffffffff803b5f80 RCX: 0000000000000080
<4>RDX: ffff810016431fd8 RSI: 0000000000000080 RDI: ffff81001f792040
<4>RBP: ffffffff80416ee0 R08: 0000000000000001 R09: ffff810080c29000
<4>R10: 0000000000000046 R11: ffffffff800076cd R12: ffffffff8005dc8e
<4>R13: 0000000000000002 R14: ffffffff80076f1d R15: ffffffff80416ee0
<4>FS:  00002b486effcb90(0000) GS:ffffffff8039e000(0000) knlGS:0000000000000000
<4>CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
<4>CR2: 00002b486e684ef0 CR3: 000000001cbe7000 CR4: 00000000000006e0
<4>
<4>Call Trace:
<4> <IRQ>  [<ffffffff8005e2fc>] call_softirq+0x1c/0x28
<4> [<ffffffff8006c571>] do_softirq+0x2c/0x85
<4> [<ffffffff8005dc8e>] apic_timer_interrupt+0x66/0x6c
<4> <EOI>  [<ffffffff800076cd>] ide_outb+0x0/0x9
<4> [<ffffffff80064aa8>] _spin_unlock_irqrestore+0x8/0x9
<4> [<ffffffff801c959a>] do_rw_taskfile+0x198/0x1f4
<4> [<ffffffff8000ecfb>] ide_do_request+0x46a/0x78d
<4> [<ffffffff800d3432>] kmem_freepages+0xe6/0x110
<4> [<ffffffff80137887>] elv_insert+0xd6/0x1f7
<4> [<ffffffff800413d3>] ide_do_drive_cmd+0xc0/0x116
<4> [<ffffffff801c97c0>] ide_diag_taskfile+0xbe/0xcc
<4> [<ffffffff80138a05>] blk_end_sync_rq+0x0/0x2e
<4> [<ffffffff801cc798>] ide_cacheflush_p+0x6a/0x85
<4> [<ffffffff8003f5ae>] pagevec_lookup+0x17/0x1e
<4> [<ffffffff801c9ace>] task_no_data_intr+0x0/0x87
<4> [<ffffffff801ccbb2>] idedisk_release+0x31/0x9e
<4> [<ffffffff80064bd5>] lock_kernel+0x1b/0x32
<4> [<ffffffff800dc1a2>] __blkdev_put+0x6d/0x169
<4> [<ffffffff800dc270>] __blkdev_put+0x13b/0x169
<4> [<ffffffff80012535>] __fput+0xae/0x198
<4> [<ffffffff800239d6>] filp_close+0x5c/0x64
<4> [<ffffffff8001d9e5>] sys_close+0x88/0xa2
<4> [<ffffffff8005d116>] system_call+0x7e/0x83
<4>
<6>kjournald starting.  Commit interval 5 seconds
<6>EXT3 FS on hda3, internal journal
<6>EXT3-fs: mounted filesystem with ordered data mode.


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

>Comment By: Shawn starr (sh0nx)
Date: 2008-09-10 18:12

Message:
Kernel is: 2.6.27-0.321.rc6.fc10.x86_64

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

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2104487&group_id=180599
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