GIT – was unresponsive for an hour so i rebooted it and checked /var/log/messages and found this. 

Sep 28 07:39:35 www : INFO: task mysqld:22749 blocked for more than 120 seconds.
Sep 28 07:39:35 www : "echo 0 > /proc/sys//hung_task_timeout_secs" disables this message.
Sep 28 07:39:35 www : mysqld        D ffff810001015120     0 22749   3266         22792 22659 (NOTLB)
Sep 28 07:39:35 www :  ffff810139d21e58 0000000000000086 ffff810036217000 ffffffff8000f758
Sep 28 07:39:35 www :  ffff81020dfd1408 0000000000000007 ffff8101cfbaf7e0 ffff81020fca5080
Sep 28 07:39:35 www :  00017a451524782a 00000000000043b2 ffff8101cfbaf9c8 0000000280009a22
Sep 28 07:39:35 www : Call Trace:
Sep 28 07:39:35 www :  [<ffffffff8000f758>] generic_permission+0x52/0xca
Sep 28 07:39:35 www :  [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b
Sep 28 07:39:35 www :  [<ffffffff8000cea2>] do_path_lookup+0x294/0x310
Sep 28 07:39:35 www :  [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14
Sep 28 07:39:35 www :  [<ffffffff8003c618>] do_unlinkat+0x66/0x141
Sep 28 07:39:35 www :  [<ffffffff8005d229>] tracesys+0x71/0xe0
Sep 28 07:39:57 www :  [<ffffffff8005d28d>] tracesys+0xd5/0xe0
Sep 28 07:39:58 www : 

It’s a warning, a debugging feature. Your kernel has CONFIG_DETECT_HUNG_TASK feature enabled. As per CONFIG_DETECT_HUNG_TASK description (took from kernel config option help section http://lxr.linux.no/linux+ */lib/Kconfig.debug#L264):

 "When a hung task is detected, the kernel will print the  current stack trace
 (which you should report), but the task will stay in uninterruptible state."

And, this is the reason. You had few process stuck for more than 120 sec on uninterrruptible state. If you want to clean it up, just do the followings ( or update new kernel )

          "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
Sometime, we have this problem with  and another process

[58Z?Z1.5?Z840] INFUI task java:21547 blocked for more than 120 seconds.
[58Z?Z1.5?Z986] "echo 0 > /proc/sgs/kernel/hung_task_timeout_secs" disables this
message.
[58Z841.5?Z06Z] INFUI task kjournald:190 blocked for more than 120 seconds.
[58Z841.5?Z336] "echo 0 > /proc/sgs/kernel/hung_task_timeout_secs" disables this
message.
[58Z841.5?Z600] INFUI task flush-202:0:709 blocked for more than 120 seconds.
[58Z841.5?Z90?] "echo 0 > /proc/sgs/kernel/hung_task_timeout_secs" disables this
message.
[58Z841.5?3413] INFUI task java:21547 blocked for more than 120 seconds.
[58Z841.5?368Z] "echo 0 > /proc/sgs/kernel/hung_task_timeout_secs" disables this
message.
[58Z961.5?ZZ36] INFUI task kjournald:60 blocked for more than 120 seconds.
[58Z961.5?Z6Z5] "echo 0 > /proc/sgs/kernel/hung_task_timeout_secs" disables this
message.
[58Z961.5?31ZZ] INFUI task flush-202:0:709 blocked for more than 120 seconds.
[58Z961.5?3393] "echo 0 > /proc/sgs/kernel/hung_task_timeout_secs" disables this
message.
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