[linux-lvm] pccardd process takes 100% CPU

[Zdenek Kabelac]

Hi

When I've tried 3.19-rc3/4 kernel - after boot I just see 1 CPU core being
busy 100% with pccard process.

Here is also some kernel WARNING:
(unsure how it's related to busy looping)

------------[ cut here ]------------
WARNING: CPU: 0 PID: 185 at kernel/sched/core.c:7300 __might_sleep+0xbd/0xd0()
do not call blocking ops when !TASK_RUNNING; state=1 set at
[<ffffffff81518538>] pccardd+0xe8/0x490
Modules linked in: uhci_hcd sr_mod cdrom yenta_socket ehci_pci ehci_hcd
usbcore usb_common video backlight autofs4
CPU: 0 PID: 185 Comm: pccardd Not tainted 3.19.0-rc4-00143-gbeefabb #2
Hardware name: LENOVO 6464CTO/6464CTO, BIOS 7LETC9WW (2.29 ) 03/18/2011
ffffffff819e4ac2 ffff8800b845bc58 ffffffff816389cd 0000000000000007
ffff8800b845bca8 ffff8800b845bc98 ffffffff8105874a ffff880000000000
ffffffff819e5dab 000000000000026d 0000000000000000 0000000000000080
Call Trace:
[<ffffffff816389cd>] dump_stack+0x4f/0x7b
[<ffffffff8105874a>] warn_slowpath_common+0x8a/0xc0
[<ffffffff810587c6>] warn_slowpath_fmt+0x46/0x50
[<ffffffff81518538>] ? pccardd+0xe8/0x490
[<ffffffff81518538>] ? pccardd+0xe8/0x490
[<ffffffff810840dd>] __might_sleep+0xbd/0xd0
[<ffffffff8163c4de>] mutex_lock_nested+0x2e/0x440
[<ffffffff81640ffd>] ? _raw_spin_unlock_irqrestore+0x5d/0x80
[<ffffffff8108b3db>] ? preempt_count_sub+0xab/0x100
[<ffffffff815185a0>] pccardd+0x150/0x490
[<ffffffff81518450>] ? pcmcia_socket_dev_complete+0x40/0x40
[<ffffffff8107dacf>] kthread+0x11f/0x140
[<ffffffff8107d9b0>] ? kthread_create_on_node+0x260/0x260
[<ffffffff81641b6c>] ret_from_fork+0x7c/0xb0
[<ffffffff8107d9b0>] ? kthread_create_on_node+0x260/0x260
---[ end trace 9a800478929367fe ]---


My HW - Lenovo T61, 4G Ram, C2D, nothing in pcmcia slot is inserted.
Full dmesg and config attached.


Regards

Zdenek