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I've just built a new box with centos 6.4 minimal

  • Asus P8H77-I mobo w/ Intel Core i3
  • 3x Seagate 2TB sata3 in raid 5 (using the intel firmware raid at boot)

yum update and all that and we're having a grand time together.

However i'm seeing kslowd000 to kslowd003 taking 10% cpu at all time. I did search on this forum and found out the only way forward was to run a debug flag after recompiling the kernel. That seems incredibly involved for a minimal install of Centos with nothing running on it.

Update:

In var/log/messages I can see:

Apr 15 22:07:41 xxxx kernel: fbcon: inteldrmfb (fb0) is primary device
Apr 15 22:07:41 xxxx kernel: fb0: inteldrmfb frame buffer device
Apr 15 22:07:41 xxxx kernel: drm: registered panic notifier
Apr 15 22:07:41 xxxx kernel: [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
Apr 15 22:11:00 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:11:00 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:11:00 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:11:00 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:11:00 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:13:38 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:13:38 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:13:38 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:13:38 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125
Apr 15 22:13:38 xxxx kernel: [drm:drm_kms_helper_poll_enable] *ERROR* delayed enqueue failed -125

Before I go and risk my entire build, is there an obvious fix for this issue? Thank you.

share|improve this question
    
I'd go for software RAID using mdadm(8) and forget about the RAID controller of the motherboard. –  dawud Apr 14 '13 at 12:39
    
@dawud: you think this could be related to my kslowd000 issue or is this just a matter of 'best practices' in general? Thank you –  Stephan Tual Apr 14 '13 at 13:23
    
It is usually accepted that software RAID is better than consumer-level RAID controllers, that's all. –  dawud Apr 14 '13 at 13:26

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