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Bug 667359 - forward port xen pvops changes for evtchn
Summary: forward port xen pvops changes for evtchn
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.0
Hardware: Unspecified
OS: Unspecified
low
medium
Target Milestone: rc
: ---
Assignee: Andrew Jones
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 523117
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-01-05 12:37 UTC by Paolo Bonzini
Modified: 2011-08-30 07:26 UTC (History)
5 users (show)

Fixed In Version: kernel-2.6.32-112.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-23 20:33:08 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0542 0 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 6.1 kernel security, bug fix and enhancement update 2011-05-19 11:58:07 UTC

Description Paolo Bonzini 2011-01-05 12:37:04 UTC 
The following commits will fix various bugs in event channels.  They could also fix problems in migration since many of them affect the suspend/resume path.

06b0362 (xen: Fix find_unbound_irq in presence of ioapic irqs., 2010-05-14)
9fa90aa (xen: use dynamic_irq_init_keep_chip_data, 2010-08-19)
aaca496 (xen: use percpu interrupts for IPIs and VIRQs, 2010-08-20)
dffe2e1 (xen: handle events as edge-triggered, 2010-08-20)
e041956 (xen/events: use locked set|clear_bit() for cpu_evtchn_mask, 2010-11-16)
1c6969e (xen/evtchn: clear secondary CPUs' cpu_evtchn_mask[] after restore, 2010-11-16)
6903591 (xen: events: do not unmask event channels on resume, 2010-11-01)
a52521f (xen: set up IRQ before binding virq to evtchn, 2010-09-22)
b0097ad (xen: ensure that all event channels start off bound to VCPU 0, 2010-10-08)
3b32f57 (xen: statically initialize cpu_evtchn_mask_p, 2009-08-13)
77dff1c (x86: xen: Sanitise sparse_irq handling, 2010-09-29)
Comment 2 RHEL Program Management 2011-01-06 18:10:31 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.
Comment 3 Andrew Jones 2011-01-10 15:04:59 UTC 
Backporting these patches unfortunately don't fix the migration issues, in fact they got worse. On two systems where I could migrate one direction, but not the other before the backports, with them I wasn't able to migrate at all. I have found that using 2.6.37-2.fc15.x86_64 I'm able to migrate in both directions. So it looks like there are some other patches necessary that need to be found.
Comment 4 Andrew Jones 2011-01-13 17:43:12 UTC 
This bug can be considered synching specifically drivers/xen/events.c

Already have:
aaca496 (xen: use percpu interrupts for IPIs and VIRQs, 2010-08-20)
dffe2e1 (xen: handle events as edge-triggered, 2010-08-20)
06b0362 (xen: Fix find_unbound_irq in presence of ioapic irqs., 2010-05-14)

Skipped:
77dff1c (x86: xen: Sanitise sparse_irq handling, 2010-09-29)
        * would require general kernel backports outside of xen files
6903591 (xen: events: do not unmask event channels on resume, 2010-11-01)
        * only first 2 hunks would be applicable, but those are for performance, so they're not worth the risk

cherry-picked the remaining cleanly:
3b32f57 (xen: statically initialize cpu_evtchn_mask_p, 2009-08-13)
9fa90aa (xen: use dynamic_irq_init_keep_chip_data, 2010-08-19)
a52521f (xen: set up IRQ before binding virq to evtchn, 2010-09-22)
b0097ad (xen: ensure that all event channels start off bound to VCPU 0, 2010-10-08)
e041956 (xen/events: use locked set|clear_bit() for cpu_evtchn_mask, 2010-11-16)
1c6969e (xen/evtchn: clear secondary CPUs' cpu_evtchn_mask[] after restore, 2010-11-16)

Also cherry-picked these, which weren't originally listed
b21ddbf5 (xen: dynamically allocate irq & event structures, 2010-06-07)
cb52e6d9 (xen: improvements to VIRQ_DEBUG output, 2010-10-15)

So far only compile tested.
Comment 5 Andrew Jones 2011-01-14 09:59:02 UTC 
Also added cherry-pick
3588fe2e (xen/events: change to using fasteoi, 2010-08-27)

and synched-up with missing pieces of
38e20b07 (x86/xen: event channels delivery on HVM, 2010-05-14)
Comment 8 Aristeu Rozanski 2011-02-03 16:00:42 UTC 
Patch(es) available on kernel-2.6.32-112.el6
Comment 10 Aristeu Rozanski 2011-02-03 16:19:34 UTC 
Patch(es) available on kernel-2.6.32-112.el6
Comment 14 errata-xmlrpc 2011-05-23 20:33:08 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0542.html
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