Bug 1662292

Summary: [Azure][DPDK] The new kind of pmd NETVSC can't rerun the 2nd time
Product: Red Hat Enterprise Linux 7 Reporter: Yuhui Jiang <yujiang>
Component: dpdkAssignee: Maxime Coquelin <maxime.coquelin>
Status: CLOSED ERRATA QA Contact: Yuhui Jiang <yujiang>
Severity: high Docs Contact:
Priority: high    
Version: 7.6CC: ailan, atragler, bkhomuts, eterrell, hhei, leiwang, maxime.coquelin, mmorsy, ovs-qe, ribarry, tredaelli, wshi, xiaofwan, xuli, yacao, yujiang, yuxisun
Target Milestone: rcKeywords: Extras
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: dpdk-18.11-3.el7_6 Doc Type: Bug Fix
Doc Text:
When using multiple queues, there was a race with the kernel in setting up the second channel. This regression is due to a kernel change which does not allow accessing sysfs files for Hyper-V channels that are not opened. The fix consists in moving the logic to detect not ready sub channels earlier in the existing loop.
 Story Points: ---
Clone Of:
: 1676534 (view as bug list) Environment:
Last Closed: 2019-03-12 11:40:10 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1562041    
Bug Blocks: 1502856, 1676534    
Attachments:
Description Flags
NETVSC pmd log none

Comment 2 Yuhui Jiang 2018-12-27 11:15:34 UTC 
Created attachment 1517039 [details]
NETVSC pmd log
Comment 3 Mohammed Gamal 2019-01-02 06:36:02 UTC 
This should've already been fixed in upstream DPDK. The following commits fix it:
https://git.dpdk.org/dpdk/commit/drivers/bus/vmbus?id=4970103e89f4f828669acf3b465e984fdc891e1e
https://git.dpdk.org/dpdk/commit/drivers/bus/vmbus?id=07938364f249d06c658b71911ee32679eeb453e3
https://git.dpdk.org/dpdk/commit/drivers/net/netvsc?id=825ab257b5ce8235ab0cdc260e5b7b757e102875
https://git.dpdk.org/dpdk/commit/drivers/net/netvsc?id=afbc22bf51ab98b9b61b11eb6d38278a9d577111

I think this should be set to CLOSED UPSTREAM. But the question is whether we package the current upstream or backport these patches to our DPDK 18.11 package.

Amnon, any idea what should we do here?
Comment 14 Yuhui Jiang 2019-03-12 08:55:59 UTC 
NETVSC pmd need uio_hv_generic（bz#1562041） moduel enabled in RHEL7. According to bz#1562041, after updating kernel version to kernel-3.10.0-993.el7, dpdk-18.11-3.el7_6 works fine in RHEL with NETVSC pmd.
This bug has fixed.
Comment 15 errata-xmlrpc 2019-03-12 11:40:10 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:0484
Comment 20 Red Hat Bugzilla 2023-09-14 04:44:17 UTC 
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days