Created attachment 244101 [details]
Storcli output from system.

Note that this occurs with really old firmware and the current megaraid firmware.  The megaraid configuration is 12 one drive RAID zero arrays.

Certainly I'll give it a try.
________________________________________
From: James Bottomley [James.Bottomley@HansenPartnership.com]
Sent: Wednesday, November 09, 2016 12:49 PM
To: bugzilla-daemon@bugzilla.kernel.org; linux-scsi@vger.kernel.org
Cc: Samuel Silbory
Subject: Re: [Bug 187381] New: 4.9.-rc4 produces hundreds of unusable scsi devices.

On Wed, 2016-11-09 at 20:20 +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.kernel.org_show-5Fbug.cgi-3Fid-3D187381&d=CwICaQ&c=DZ-EF4pZfxGSU6MfABwx0g&r=4FOU_7YnNtQNKWSdicj67DITRyD0V0NPxX2P7qBxsr8&m=qqYheGXoM4mBPxyZZ7HM1rugSFukVAVfEjl1ifhaoqU&s=67orQXH1IekXCew60eHDOmksAqiZIU69q0eGzoqiWMM&e=
>
>             Bug ID: 187381
>            Summary: 4.9.-rc4 produces hundreds of unusable scsi
> devices.
>            Product: SCSI Drivers
>            Version: 2.5
>     Kernel Version: 4.9-rc4
>           Hardware: All
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>           Assignee: scsi_drivers-other@kernel-bugs.osdl.org
>           Reporter: samuel.silbory@hds.com
>         Regression: No
>
> Created attachment 244091 [details]
>   -->
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.kernel.org_attachment.cgi-3Fid-3D244091-26action-3Dedit&d=CwICaQ&c=DZ-EF4pZfxGSU6MfABwx0g&r=4FOU_7YnNtQNKWSdicj67DITRyD0V0NPxX2P7qBxsr8&m=qqYheGXoM4mBPxyZZ7HM1rugSFukVAVfEjl1ifhaoqU&s=ypXf8FCNK77zZPf1gXuZlzQpRkGQWJ_WEGmWjqnXTOI&e=
> Debian's kernel log file.  Note that this contains functional boots
> with older
> kernels as well earlier in the file.
>
> With both my hand compiled 4.9-rc4 from kernel.org sources and
> Ubuntu's
> 4.9.0-040900rc4-generic the kernel creates hundred of useless
> /dev/sd??
> devices.  This system is fine with various 4.4, and 4.8 kernels.
>
> The logs are spammed with messages like these
> 2016-11-09T12:17:00.021765-08:00 Node001 kernel: [75590.503155] Dev
> sdjm:
> unable to read RDB block 1
> 2016-11-09T12:17:00.021767-08:00 Node001 kernel: [75590.503188]
>  sdjm: unable
> to read partition table
> 2016-11-09T12:17:00.021769-08:00 Node001 kernel: [75590.503191] sdjm:
> partition
> table beyond EOD, enabling native capacity
> 2016-11-09T12:17:00.021776-08:00 Node001 kernel: [75590.504463] sd
> 1:3:126:0:

This was reported to the mailing list and should be fixed by this:

https://urldefense.proofpoint.com/v2/url?u=http-3A__marc.info_-3Fl-3Dlinux-2Dscsi-26m-3D147868920429684&d=CwICaQ&c=DZ-EF4pZfxGSU6MfABwx0g&r=4FOU_7YnNtQNKWSdicj67DITRyD0V0NPxX2P7qBxsr8&m=qqYheGXoM4mBPxyZZ7HM1rugSFukVAVfEjl1ifhaoqU&s=KCePcDLsNpEqob1iEoGGCb5Qf-smnMYk4XsK62Sp0h4&e=

We'll fast track this, but can you verify it fixes your issue.

Thanks,

James

Seems sane now.
root@pcsnode:~# uname -a
Linux pcsnode 4.9.0-rc4-1-default #1 SMP Wed Nov 9 13:59:28 PST 2016 x86_64 GNU/Linux
root@pcsnode:~# ls /dev/sd*
/dev/sda  /dev/sdc  /dev/sde  /dev/sdg	/dev/sdi  /dev/sdk   /dev/sdk2	/dev/sdk4  /dev/sdk6  /dev/sdl
/dev/sdb  /dev/sdd  /dev/sdf  /dev/sdh	/dev/sdj  /dev/sdk1  /dev/sdk3	/dev/sdk5  /dev/sdk7  /dev/sdm
root@pcsnode:~# 

The only difference compared to 4.8/4/4 is the boot drive on the SATA controller ended up sdk instead of sdm (the last drive).  It's not an issue for me as I mount things by UUID

________________________________________
From: Samuel Silbory
Sent: Wednesday, November 09, 2016 1:19 PM
To: James Bottomley; bugzilla-daemon@bugzilla.kernel.org; linux-scsi@vger.kernel.org
Subject: RE: [Bug 187381] New: 4.9.-rc4 produces hundreds of unusable scsi devices.

Certainly I'll give it a try.
________________________________________
From: James Bottomley [James.Bottomley@HansenPartnership.com]
Sent: Wednesday, November 09, 2016 12:49 PM
To: bugzilla-daemon@bugzilla.kernel.org; linux-scsi@vger.kernel.org
Cc: Samuel Silbory
Subject: Re: [Bug 187381] New: 4.9.-rc4 produces hundreds of unusable scsi devices.

On Wed, 2016-11-09 at 20:20 +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.kernel.org_show-5Fbug.cgi-3Fid-3D187381&d=CwICaQ&c=DZ-EF4pZfxGSU6MfABwx0g&r=4FOU_7YnNtQNKWSdicj67DITRyD0V0NPxX2P7qBxsr8&m=qqYheGXoM4mBPxyZZ7HM1rugSFukVAVfEjl1ifhaoqU&s=67orQXH1IekXCew60eHDOmksAqiZIU69q0eGzoqiWMM&e=
>
>             Bug ID: 187381
>            Summary: 4.9.-rc4 produces hundreds of unusable scsi
> devices.
>            Product: SCSI Drivers
>            Version: 2.5
>     Kernel Version: 4.9-rc4
>           Hardware: All
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>           Assignee: scsi_drivers-other@kernel-bugs.osdl.org
>           Reporter: samuel.silbory@hds.com
>         Regression: No
>
> Created attachment 244091 [details]
>   -->
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.kernel.org_attachment.cgi-3Fid-3D244091-26action-3Dedit&d=CwICaQ&c=DZ-EF4pZfxGSU6MfABwx0g&r=4FOU_7YnNtQNKWSdicj67DITRyD0V0NPxX2P7qBxsr8&m=qqYheGXoM4mBPxyZZ7HM1rugSFukVAVfEjl1ifhaoqU&s=ypXf8FCNK77zZPf1gXuZlzQpRkGQWJ_WEGmWjqnXTOI&e=
> Debian's kernel log file.  Note that this contains functional boots
> with older
> kernels as well earlier in the file.
>
> With both my hand compiled 4.9-rc4 from kernel.org sources and
> Ubuntu's
> 4.9.0-040900rc4-generic the kernel creates hundred of useless
> /dev/sd??
> devices.  This system is fine with various 4.4, and 4.8 kernels.
>
> The logs are spammed with messages like these
> 2016-11-09T12:17:00.021765-08:00 Node001 kernel: [75590.503155] Dev
> sdjm:
> unable to read RDB block 1
> 2016-11-09T12:17:00.021767-08:00 Node001 kernel: [75590.503188]
>  sdjm: unable
> to read partition table
> 2016-11-09T12:17:00.021769-08:00 Node001 kernel: [75590.503191] sdjm:
> partition
> table beyond EOD, enabling native capacity
> 2016-11-09T12:17:00.021776-08:00 Node001 kernel: [75590.504463] sd
> 1:3:126:0:

This was reported to the mailing list and should be fixed by this:

https://urldefense.proofpoint.com/v2/url?u=http-3A__marc.info_-3Fl-3Dlinux-2Dscsi-26m-3D147868920429684&d=CwICaQ&c=DZ-EF4pZfxGSU6MfABwx0g&r=4FOU_7YnNtQNKWSdicj67DITRyD0V0NPxX2P7qBxsr8&m=qqYheGXoM4mBPxyZZ7HM1rugSFukVAVfEjl1ifhaoqU&s=KCePcDLsNpEqob1iEoGGCb5Qf-smnMYk4XsK62Sp0h4&e=

We'll fast track this, but can you verify it fixes your issue.

Thanks,

James

I got same issue today.
After apply the patch, everything work fine now.