Bug 705714 - Fail to generate VFs due to not enough MMIO resources for SR-IOV
Summary: Fail to generate VFs due to not enough MMIO resources for SR-IOV
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.7
Hardware: x86_64
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Alex Williamson
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-05-18 08:36 UTC by Chao Yang
Modified: 2013-03-27 14:38 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-03-27 14:38:41 UTC
Target Upstream Version:

Attachments (Terms of Use)
host cpu and pci info (5.44 KB, text/plain)
2011-05-18 08:39 UTC, Chao Yang 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Description Chao Yang 2011-05-18 08:36:39 UTC 
Description of problem:

Version-Release number of selected component (if applicable):
host: 2.6.18-260.el5

How reproducible:
100%

Steps to Reproduce:
1.modprobe -r ixgbe;modprobe igxgbe max_vfs=4
2.
3.
  
Actual results:
Fail to generate VFs due to not enough MMIO resources for SR-IOV. Will attach the pci info.

Expected results:
should generate VFs as max_vfs gives.

Additional info:
**NOTE**
This platform + 82599 can generate VFs with RHEL6.1 OS.

# lsmod |grep ixgbe
ixgbe                 161493  0 
dca                    41605  1 ixgbe
8021q                  58449  2 ixgbe,cxgb3
# modinfo ixgbe
filename:       /lib/modules/2.6.18-260.el5/kernel/drivers/net/ixgbe/ixgbe.ko
version:        3.2.9-k2
license:        GPL
description:    Intel(R) 10 Gigabit PCI Express Network Driver
author:         Intel Corporation, <linux.nics>
srcversion:     8A8D36FBBAA279501D18FE6
...
depends:        dca,8021q
vermagic:       2.6.18-260.el5 SMP mod_unload gcc-4.1
parm:           IntMode:Change Interrupt Mode (0=Legacy, 1=MSI, 2=MSI-X), default 2 (array of int)
parm:           max_vfs:Maximum number of virtual functions to allocate per physical function (uint)
Comment 1 Chao Yang 2011-05-18 08:39:41 UTC 
Created attachment 499545 [details]
host cpu and pci info
Comment 2 Chao Yang 2011-05-18 08:56:08 UTC 
Marking as TestBlocker cause this issue blocks our SR-IOV testing on Westmere-EP
Comment 6 Chao Yang 2011-05-24 08:33:57 UTC 
82599 works well on Dell PowerEdge R910(Nehalem-ex, Intel(R) Xeon(R) CPU X7550 @ 2.00GHz), on this host, 82599 can successfully generate VFs without error.
Comment 9 RHEL Program Management 2012-01-09 14:25:56 UTC 
This request was evaluated by Red Hat Product Management for inclusion in Red Hat Enterprise Linux 5.8 and Red Hat does not plan to fix this issue the currently developed update.

Contact your manager or support representative in case you need to escalate this bug.
Comment 10 Shuah Khan 2012-09-18 18:10:17 UTC 
Can you please provide more details on the nature of the problem and the reasons for not including it in RHEL 5.8. I am seeing the same problem on Sandy Bridge systems and would like to get more information to help our cutomers with the SR-IOV recommendation on RHEL 5.8. 

Has this problem been fixed in in RHEL 5.9?
Comment 11 RHEL Program Management 2012-10-30 06:06:58 UTC 
This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.
Comment 12 Ronen Hod 2013-03-27 14:38:41 UTC 
Closing for RHEL5.10, as this is not a regression or a customer bug.
We can reopen this bug if needed.
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