Re: 2.6.19-rc6-rt5

Alistair John Strachan
2006-11-20T23:18:12Z

On Monday 20 November 2006 22:02, Ingo Molnar wrote:
> i've released the 2.6.19-rc6-rt5 tree, which can be downloaded from the
> usual place:

Couple of problems:

[ 320.142298] ehci_hcd: Unknown symbol usb_hcd_pci_suspend
[ 320.142837] ehci_hcd: Unknown symbol usb_free_urb
[ 320.142901] ehci_hcd: Unknown symbol usb_hub_tt_clear_buffer
[ 320.142954] ehci_hcd: Unknown symbol usb_hcd_resume_root_hub
[ 320.143006] ehci_hcd: Unknown symbol usb_hcd_pci_probe
[ 320.143144] ehci_hcd: Unknown symbol usb_calc_bus_time
[ 320.143201] ehci_hcd: Unknown symbol usb_hcd_pci_shutdown
[ 320.143255] ehci_hcd: Unknown symbol usb_hcd_pci_resume
[ 320.143365] ehci_hcd: Unknown symbol usb_get_urb
[ 320.143417] ehci_hcd: Unknown symbol usb_hcd_giveback_urb
[ 320.143478] ehci_hcd: Unknown symbol usb_hcd_pci_remove
[ 320.143544] ehci_hcd: Unknown symbol usb_root_hub_lost_power

Not sure why. Don't notice it on 2.6.19-rc6. Means my distro's udev script
takes eons to complete, but I can get to init 3.

Got this when I mounted my /home partition:

[ 375.927366] XFS mounting filesystem md2
[ 376.724666] Ending clean XFS mount for filesystem: md2
[ 441.121031] stopped custom tracer.
[ 441.121067]
[ 441.121068] =============================================
[ 441.121131] [ INFO: possible recursive locking detected ]
[ 441.121165] 2.6.19-rc6-rt5 #3
[ 441.121197] ---------------------------------------------
[ 441.121231] as/1018 is trying to acquire lock:
[ 441.121264] ((struct compat_rw_semaphore *)(&(&ip->i_lock)->mr_lock)){----}, at: [<ffffffff80332b27>] xfs_ilock+0x67/0xa0
[ 441.121397]
[ 441.121398] but task is already holding lock:
[ 441.121459] ((struct compat_rw_semaphore *)(&(&ip->i_lock)->mr_lock)){----}, at: [<ffffffff80332b27>] xfs_ilock+0x67/0xa0
[ 441.121589]
[ 441.121590] other info that might help us debug this:
[ 441.121652] 2 locks held by as/1018:
[ 441.121684] #0: (&inode->i_mutex){--..}, at: [<ffffffff8021c380>] open_namei+0x100/0x6c0
[ 441.121833] #1: ((struct compat_rw_semaphore *)(&(&ip->i_lock)->mr_lock)){----}, at: [<ffffffff80332b27>] xfs_ilock+0x67
/0xa0
[ 441.121984]
[ 441.121985] stack backtrace:
[ 441.122044]
[ 441.122045] Call Trace:
[ 441.122108] [<ffffffff80271eb3>] dump_trace+0xc3/0x4a0
[ 441.122145] [<ffffffff802722d3>] show_trace+0x43/0x70
[ 441.122180] [<ffffffff80272315>] dump_stack+0x15/0x20
[ 441.122217] [<ffffffff802adaa1>] __lock_acquire+0x991/0xce0
[ 441.122254] [<ffffffff802ade78>] lock_acquire+0x88/0xc0
[ 441.122289] [<ffffffff802a8989>] compat_down_write+0x39/0x50
[ 441.122325] [<ffffffff80332b27>] xfs_ilock+0x67/0xa0
[ 441.122361] [<ffffffff80333794>] xfs_iget+0x384/0x880
[ 441.122397] [<ffffffff8034b4c4>] xfs_trans_iget+0xc4/0x150
[ 441.122433] [<ffffffff80337d2e>] xfs_ialloc+0x9e/0x4d0
[ 441.122469] [<ffffffff8034c09f>] xfs_dir_ialloc+0x7f/0x2d0
[ 441.122505] [<ffffffff80352a94>] xfs_create+0x354/0x6c0
[ 441.122541] [<ffffffff8035c73a>] xfs_vn_mknod+0x15a/0x2f0
[ 441.122577] [<ffffffff8035c8eb>] xfs_vn_create+0xb/0x10
[ 441.122613] [<ffffffff8023d000>] vfs_create+0x90/0xf0
[ 441.122649] [<ffffffff8021c455>] open_namei+0x1d5/0x6c0
[ 441.122685] [<ffffffff80229818>] do_filp_open+0x28/0x50
[ 441.122721] [<ffffffff8021af0a>] do_sys_open+0x5a/0xf0
[ 441.122757] [<ffffffff80233d3b>] sys_open+0x1b/0x20
[ 441.122793] [<ffffffff80265d5e>] system_call+0x7e/0x83
[ 441.122831] [<000000337b1ac630>]
[ 441.122863]
[ 441.122893] 2 locks held by as/1018:
[ 441.122925] #0: (&inode->i_mutex){--..}, at: [<ffffffff8021c380>] open_namei+0x100/0x6c0
[ 441.123073] #1: ((struct compat_rw_semaphore *)(&(&ip->i_lock)->mr_lock)){----}, at: [<ffffffff80332b27>] xfs_ilock+0x67/0xa0
[ 441.123224] ---------------------------
[ 441.123256] | preempt count: 00000000 ]
[ 441.123288] | 0-level deep critical section nesting:
[ 441.123322] ----------------------------------------

Also, I assume latency tracing still isn't working on x86_64? I don't
get a /proc/sys/kernel/preempt_max_latency file, but I have
the right option enabled.

Find my config and the entire dmesg log here:

http://devzero.co.uk/~alistair/2.6.19-rc6-rt5/

--
Cheers,
Alistair.

Final year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.