Got it again, when upgrading to 1.99-9, running under a 2.6.38.4
kernel. kern.log reads the following, maybe it will give more ideas
about what's going on ? Concurency issue in kernel space ?
Aug 11 22:26:59 home kernel: [222362.080164] INFO: task grub-mkdevicema:24535
blocked for more than 120 seconds.
Aug 11 22:26:59 home kernel: [222362.080176] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Aug 11 22:26:59 home kernel: [222362.080183] grub-mkdevicema D 00000001034e66cc
0 24535 24534 0x00000000
Aug 11 22:26:59 home kernel: [222362.080196] ffff88008e95db28 0000000000000082
ffff880000000000 00000000000134c0
Aug 11 22:26:59 home kernel: [222362.080206] 00000000000134c0 00000000000134c0
00000000000134c0 ffff880001ad5100
Aug 11 22:26:59 home kernel: [222362.080215] 00000000000134c0 ffff88008e95dfd8
ffff88008e95dfd8 00000000000134c0
Aug 11 22:26:59 home kernel: [222362.080224] Call Trace:
Aug 11 22:26:59 home kernel: [222362.080241] [<ffffffff8132e6ff>]
__mutex_lock_common.clone.5+0x131/0x198
Aug 11 22:26:59 home kernel: [222362.080254] [<ffffffff811928a0>] ?
exact_match+0x0/0xa
Aug 11 22:26:59 home kernel: [222362.080263] [<ffffffff8132e774>]
__mutex_lock_slowpath+0xe/0x10
Aug 11 22:26:59 home kernel: [222362.080271] [<ffffffff8132e5b4>]
mutex_lock+0x1e/0x38
Aug 11 22:26:59 home kernel: [222362.080282] [<ffffffff8112764c>]
__blkdev_get+0x71/0x339
Aug 11 22:26:59 home kernel: [222362.080291] [<ffffffff81127ba3>] ?
blkdev_open+0x0/0x6b
Aug 11 22:26:59 home kernel: [222362.080300] [<ffffffff81127ac8>]
blkdev_get+0x1b4/0x28f
Aug 11 22:26:59 home kernel: [222362.080309] [<ffffffff81127ba3>] ?
blkdev_open+0x0/0x6b
Aug 11 22:26:59 home kernel: [222362.080317] [<ffffffff81127c0a>]
blkdev_open+0x67/0x6b
Aug 11 22:26:59 home kernel: [222362.080325] [<ffffffff810fddae>]
__dentry_open+0x15e/0x278
Aug 11 22:26:59 home kernel: [222362.080334] [<ffffffff8132f14c>] ?
_raw_spin_lock+0x9/0xb
Aug 11 22:26:59 home kernel: [222362.080343] [<ffffffff81115b82>] ?
mntget+0x1b/0x21
Aug 11 22:26:59 home kernel: [222362.080351] [<ffffffff810feb2c>]
nameidata_to_filp+0x5b/0x62
Aug 11 22:26:59 home kernel: [222362.080360] [<ffffffff8110a68d>]
finish_open+0x9c/0x15a
Aug 11 22:26:59 home kernel: [222362.080368] [<ffffffff8110982a>] ?
do_path_lookup+0xe8/0x113
Aug 11 22:26:59 home kernel: [222362.080376] [<ffffffff8110abb4>]
do_filp_open+0x184/0x696
Aug 11 22:26:59 home kernel: [222362.080387] [<ffffffff810dd1a1>] ?
handle_mm_fault+0x131/0x146
Aug 11 22:26:59 home kernel: [222362.080396] [<ffffffff811a5f39>] ?
might_fault+0x9/0xb
Aug 11 22:26:59 home kernel: [222362.080404] [<ffffffff811a6025>] ?
__strncpy_from_user+0x1a/0x49
Aug 11 22:26:59 home kernel: [222362.080413] [<ffffffff8111488a>] ?
alloc_fd+0x6f/0x11a
Aug 11 22:26:59 home kernel: [222362.080421] [<ffffffff810feb8e>]
do_sys_open+0x5b/0xed
Aug 11 22:26:59 home kernel: [222362.080428] [<ffffffff810fec3b>]
sys_open+0x1b/0x1d
Aug 11 22:26:59 home kernel: [222362.080437] [<ffffffff81009992>]
system_call_fastpath+0x16/0x1b
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