Bug 252235

Summary: megaraid_sas: Failed to alloc kernel SGL buffer for IOCTL
Product: Red Hat Enterprise Linux 4 Reporter: gman
Component: kernelAssignee: Tom Coughlan <coughlan>
Status: CLOSED WONTFIX QA Contact: Martin Jenner <mjenner>
Severity: low Docs Contact:
Priority: low    
Version: 4.4CC: coughlan, pveiga
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2012-06-20 13:30:00 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
messages from a box running 2.6.9-42.0.10
none
messages from a box running 2.6.9-52.0.2 kernel none

Description gman 2007-08-14 20:35:10 UTC 
Description of problem:
Have several PowerEdge 2950 running kernel 2.6.9-42.0.2.ELsmp. I'm using the
builtin PERC 5/i Raid controller. All are spitting logging this error:
megasas: Failed to alloc kernel SGL buffer for IOCTL

Version-Release number of selected component (if applicable):
2.6.9-42.0.2.ELsmp

How reproducible:
Not sure how to manually reproduce it. The error does show up daily during
regular use (apache+tomcat).
Comment 1 Prarit Bhargava 2007-09-13 15:38:58 UTC 
gman, could you send us a system log showing the failure?

Thanks,

P.
Comment 2 gman 2007-09-13 18:45:19 UTC 
Created attachment 194971 [details]
messages from a box running 2.6.9-42.0.10
Comment 3 gman 2007-09-13 18:49:47 UTC 
Created attachment 194991 [details]
messages from a box running 2.6.9-52.0.2 kernel
Comment 4 gman 2007-09-13 18:52:55 UTC 
The system is no longer running 2.6.9-42.0.2 kernel. It was updated and is now
using 42.0.10. I've attached 2 logs. First is 2.6.9-42.0.10.log, this dell
poweredge 2950 w/ rhel4u4. Second is 2.6.9-52.0.2.log, this is a 1950 w/ rhel4u5
w/ all the updates minus the latest kernel of 52.0.6. Both are running kernel-smp.
Comment 5 Tom Coughlan 2007-09-14 21:47:18 UTC 
Also refer to BZ 247767.
Comment 8 Priscila 2009-06-23 13:54:27 UTC 
Kernel: 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:32:02 EDT 2006 x86_64 x86_64 x86_64 GNU/Linux
Comment 9 Tom Coughlan 2009-06-29 20:54:55 UTC 
As I mentioned above in comment #5, this may be the same problem that was reported in BZ 247767 "megaraid_sas ioctls fail under load". 

That bug was confirmed to be fixed by the driver update in Bug 312061 "Update megaraid_sas to version 3.18-rh1". That driver update went in to RHEL 4.7.

Has the reporter of this BZ been able to determine whether the problem reported here is solved by driver version 3.18-rh1 or later?
Comment 11 Jiri Pallich 2012-06-20 13:30:00 UTC 
Thank you for submitting this issue for consideration in Red Hat Enterprise Linux. The release for which you requested us to review is now End of Life. 
Please See https://access.redhat.com/support/policy/updates/errata/

If you would like Red Hat to re-consider your feature request for an active release, please re-open the request via appropriate support channels and provide additional supporting details about the importance of this issue.