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Bug 617414 - avoid canceling in flight ide dma
Summary: avoid canceling in flight ide dma
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Andrea Arcangeli
QA Contact: Virtualization Bugs
URL:
Whiteboard:
: 618901 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-07-23 00:44 UTC by Andrea Arcangeli
Modified: 2010-11-11 19:30 UTC (History)
7 users (show)

Fixed In Version: qemu-kvm-0.12.1.2-2.101.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-11-10 21:26:50 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Andrea Arcangeli 2010-07-23 00:44:09 UTC 
Description of problem: in flight dma might be aborted partially

not reproducible found by code review and applied to RHEL6 KVM package but missing in RHEL6 because rejected by upstream.
Comment 1 Andrea Arcangeli 2010-07-23 00:46:33 UTC 
Patch posted as Message-ID: <20100721152112.GZ24928> in rhvirt-patches.
Comment 2 Andrea Arcangeli 2010-07-23 00:56:27 UTC 
rediffed and reposted to rhvirt-patches as Message-ID: <20100723005600.GU24928>
Comment 4 RHEL Program Management 2010-07-23 01:17:37 UTC 
This issue has been proposed when we are only considering blocker
issues in the current Red Hat Enterprise Linux release.

** If you would still like this issue considered for the current
release, ask your support representative to file as a blocker on
your behalf. Otherwise ask that it be considered for the next
Red Hat Enterprise Linux release. **
Comment 6 Amit Shah 2010-07-23 07:16:25 UTC 
Andrea, can you note why this was rejected upstream?
Comment 7 Andrea Arcangeli 2010-07-23 14:21:33 UTC 
I submitted it to Anthony last version on 26 Feb 2009 (you can check on qemu-devel archives) and got no answer simply and apparently it wasn't applied.
Comment 8 Amit Shah 2010-07-23 15:10:44 UTC 
(In reply to comment #7)
> I submitted it to Anthony last version on 26 Feb 2009 (you can check on
> qemu-devel archives) and got no answer simply and apparently it wasn't applied.    

qemu upstream needs constant reminders; can you send out a rebased patch to the upstream list?
Comment 12 Kevin Wolf 2010-07-30 07:20:54 UTC 
*** Bug 618901 has been marked as a duplicate of this bug. ***
Comment 13 Mike Cao 2010-07-30 10:16:58 UTC 
Hi ,

Could you give me some suggestions how to verify this issue.?
Comment 14 Andrea Arcangeli 2010-07-30 13:21:17 UTC 
Ok, I'm afraid there is no way to verify it. It's a "theoretical" fix for not easily reproducible issue.

The thing to verify is that this doesn't cause regressions, so you shall run some I/O intensive workload with the -drive if=ide and then run a e2fsck -f /dev/hd?? to verify the fileysystem is fine.
Comment 15 Mike Cao 2010-08-02 03:07:37 UTC 
Verified in qemu-kvm-0.12.1.2-2.106.el6.x86_64.

Steps:
1.Since bug 618901 marked as dup of this one .Verified that bug and passed.

2.Following steps comment #14.and find no bad block inode.

Based on above ,this issue has already been fixed .
Change status to VERIFIED.
Comment 16 releng-rhel@redhat.com 2010-11-10 21:26:50 UTC 
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.
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