Re: Linux 3.19-rc5

[Zdenek Kabelac <zkabelac@redhat.com>]

Dne 30.1.2015 v 02:49 Rafael J. Wysocki napsal(a):
> On Thursday, January 29, 2015 05:12:11 PM Linus Torvalds wrote:
>> On Thu, Jan 29, 2015 at 5:22 PM, Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
>>> On Wednesday, January 21, 2015 05:54:00 PM Peter Hurley wrote:
>>>>
>>>> Yeah, but the debug check is triggering worse behavior, requiring
>>>> bisecting back to the debug commit.
>>>
>>> Yes, it is.
>>>
>>> So I'm wondering is anyone is working on fixing this in any way?
>>>
>>> It kind of sucks when this is happening on an otherwise perfectly usable
>>> old(ish) machine ...
>>
>> The WARN() was already changed to a WARN_ONCE().
>>
>> So that debug check doesn't cause problems any more. If somebody is
>> bisecting something else, and the WARN() is a problem for those
>> intermediate kernels, then just disabling CONFIG_DEBUG_ATOMIC_SLEEP
>> should get you past that point.
>>
>> IOW, this really shouldn't be an issue.
>>
>> Does the pccard thing still not work?
>
> Interestingly enough, if the kernel is built with CONFIG_DEBUG_ATOMIC_SLEEP
> unset, the problem with 99+% CPU load from pccardd goes away, so thanks for
> the hint.


Ok - I  can now 'use'  3.19-rc7 on T61 (C2D) without having a single core 
occupied on 100% with pccardd, but I still get this one logged:


[    2.185320] pcmcia_socket pcmcia_socket0: cs: memory probe 0x0c0000-0x0fffff:
[    2.185363]  excluding 0xc0000-0xcffff 0xe0000-0xfffff
[    2.185526] pcmcia_socket pcmcia_socket0: cs: memory probe 
0xa0000000-0xa0ffffff:
[    2.185559]  excluding 0xa0000000-0xa0ffffff
[    2.185720] pcmcia_socket pcmcia_socket0: cs: memory probe 
0x60000000-0x60ffffff:
[    2.185754]  excluding 0x60000000-0x60ffffff
[    2.297692] ------------[ cut here ]------------
[    2.297698] WARNING: CPU: 1 PID: 185 at kernel/sched/core.c:7300 
__might_sleep+0xae/0xc0()
[    2.297702] do not call blocking ops when !TASK_RUNNING; state=1 set at 
[<ffffffff81518e18>] pccardd+0xe8/0x490
[    2.297712] Modules linked in: uhci_hcd sr_mod cdrom ehci_pci ehci_hcd 
yenta_socket usbcore usb_common video backlight autofs4
[    2.297715] CPU: 1 PID: 185 Comm: pccardd Not tainted 
3.19.0-rc7-00002-g9afdf96 #5
[    2.297716] Hardware name: LENOVO 6464CTO/6464CTO, BIOS 7LETC9WW (2.29 ) 
03/18/2011
[    2.297719]  ffffffff819e4d8a ffff8800b8bdbc58 ffffffff8163926d 
ffffffff810a9e1e
[    2.297721]  ffff8800b8bdbca8 ffff8800b8bdbc98 ffffffff810587ba 
ffff880000000000
[    2.297724]  ffffffff819e6073 000000000000026d 0000000000000000 
0000000000000080
[    2.297725] Call Trace:
[    2.297729]  [<ffffffff8163926d>] dump_stack+0x4f/0x7b
[    2.297732]  [<ffffffff810a9e1e>] ? down_trylock+0x2e/0x40
[    2.297736]  [<ffffffff810587ba>] warn_slowpath_common+0x8a/0xc0
[    2.297738]  [<ffffffff81058836>] warn_slowpath_fmt+0x46/0x50
[    2.297741]  [<ffffffff81518e18>] ? pccardd+0xe8/0x490
[    2.297742]  [<ffffffff81518e18>] ? pccardd+0xe8/0x490
[    2.297744]  [<ffffffff8108412e>] __might_sleep+0xae/0xc0
[    2.297747]  [<ffffffff8163cd7e>] mutex_lock_nested+0x2e/0x440
[    2.297749]  [<ffffffff8164189d>] ? _raw_spin_unlock_irqrestore+0x5d/0x80
[    2.297753]  [<ffffffff8108b42b>] ? preempt_count_sub+0xab/0x100
[    2.297755]  [<ffffffff81518e80>] pccardd+0x150/0x490
[    2.297757]  [<ffffffff81518d30>] ? pcmcia_socket_dev_complete+0x40/0x40
[    2.297760]  [<ffffffff8107db1f>] kthread+0x11f/0x140
[    2.297763]  [<ffffffff8107da00>] ? kthread_create_on_node+0x260/0x260
[    2.297766]  [<ffffffff8164242c>] ret_from_fork+0x7c/0xb0
[    2.297768]  [<ffffffff8107da00>] ? kthread_create_on_node+0x260/0x260
[    2.297770] ---[ end trace ed9e591061d223e6 ]---
[    2.464635] usb 3-1: new full-speed USB device number 2 using uhci_hcd




and of course number of these:

[   29.660708] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[   29.667061] i915 0000:00:02.0: registered panic notifier
[   30.314206] ------------[ cut here ]------------
[   30.318866] WARNING: CPU: 0 PID: 1010 at drivers/gpu/drm/drm_irq.c:1121 
drm_wait_one_vblank+0x180/0x190 [drm]()
[   30.329085] vblank not available on crtc 1, ret=-22
[   30.334003] Modules linked in: i915 i2c_algo_bit drm_kms_helper drm 
xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4
  iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack 
nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun brid
ge stp llc ipv6 ebtables ip6_tables iptable_filter ip_tables x_tables bnep 
iTCO_wdt hid_generic iTCO_vendor_support snd_hda_codec_analo
g snd_hda_codec_generic coretemp kvm_intel kvm microcode usbhid psmouse 
serio_raw hid arc4 r852 sm_common nand i2c_i801 nand_ecc i2c_co
re nand_ids mtd btusb bluetooth iwl3945 sdhci_pci r592 iwlegacy memstick 
pcmcia snd_hda_intel sdhci mac80211 snd_hda_controller mmc_cor
e snd_hda_codec snd_hwdep lpc_ich snd_seq mfd_core snd_seq_device snd_pcm 
e1000e cfg80211 ptp thinkpad_acpi snd_timer pps_core wmi nvra
m
[   30.406592]  snd soundcore evdev nfsd auth_rpcgss oid_registry nfs_acl 
lockd grace binfmt_misc loop sunrpc uhci_hcd sr_mod cdrom ehc
i_pci ehci_hcd yenta_socket usbcore usb_common video backlight autofs4
[   30.424031] CPU: 1 PID: 1010 Comm: Xorg.bin Tainted: G        W 
3.19.0-rc7-00002-g9afdf96 #5
[   30.432930] Hardware name: LENOVO 6464CTO/6464CTO, BIOS 7LETC9WW (2.29 ) 
03/18/2011
[   30.440627]  ffffffffa0e1017f ffff880135a37a28 ffffffff8163926d 
ffff88013abcf238
[   30.448250]  ffff880135a37a78 ffff880135a37a68 ffffffff810587ba 
0000000000000001
[   30.455780]  ffff8800af5b4000 ffff880135974000 0000000000000001 
ffff8800acca0000
[   30.463328] Call Trace:
[   30.465850]  [<ffffffff8163926d>] dump_stack+0x4f/0x7b
[   30.471066]  [<ffffffff810587ba>] warn_slowpath_common+0x8a/0xc0
[   30.477095]  [<ffffffff81058836>] warn_slowpath_fmt+0x46/0x50
[   30.482919]  [<ffffffffa0de5a10>] drm_wait_one_vblank+0x180/0x190 [drm]
[   30.489683]  [<ffffffffa0f11a70>] intel_enable_sdvo+0x70/0x120 [i915]
[   30.496206]  [<ffffffffa0ed6241>] ? intel_enable_pipe+0xf1/0x220 [i915]
[   30.502914]  [<ffffffffa0ede11b>] i9xx_crtc_enable+0x3fb/0x4b0 [i915]
[   30.509478]  [<ffffffffa0edc692>] __intel_set_mode+0x8a2/0xcb0 [i915]
[   30.515995]  [<ffffffffa0ee351b>] intel_crtc_set_config+0xc0b/0xf90 [i915]
[   30.522922]  [<ffffffffa0def259>] drm_mode_set_config_internal+0x69/0x120 [drm]
[   30.530310]  [<ffffffffa0e4e5d8>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper]
[   30.537682]  [<ffffffff811d1607>] ? kfree+0xe7/0x3b0
[   30.542771]  [<ffffffffa0e50649>] 
drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
[   30.552175]  [<ffffffffa0ef212e>] intel_fbdev_restore_mode+0x1e/0x50 [i915]
[   30.559259]  [<ffffffffa0f16fee>] i915_driver_lastclose+0xe/0x10 [i915]
[   30.565916]  [<ffffffffa0de1e1e>] drm_lastclose+0x2e/0x150 [drm]
[   30.571991]  [<ffffffffa0de2280>] drm_release+0x340/0x550 [drm]
[   30.577986]  [<ffffffff811ef5b3>] __fput+0xf3/0x210
[   30.582926]  [<ffffffff811ef71e>] ____fput+0xe/0x10
[   30.587931]  [<ffffffff8107bfdc>] task_work_run+0xcc/0x100
[   30.593479]  [<ffffffff81004181>] do_notify_resume+0x61/0x90
[   30.599241]  [<ffffffff816427c7>] int_signal+0x12/0x17
[   30.604456] ---[ end trace ed9e591061d223e7 ]---
[   30.609191] ------------[ cut here ]------------




Regards


Zdenek