Bug 802226 - Back to userspace when fail to allocate ioeventfd
Summary: Back to userspace when fail to allocate ioeventfd
Keywords:
Status: CLOSED DUPLICATE of bug 753692
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.3
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Amos Kong
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-03-12 07:26 UTC by Amos Kong
Modified: 2015-05-25 00:06 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-03-12 07:59:30 UTC
Target Upstream Version:

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Description Amos Kong 2012-03-12 07:26:29 UTC 
Description of problem:

If we support pci-bridge, we would have more pci-devices.
Then kernel could not provide enough ioeventfd, virtio net/blk should go back to userspace when fail to allocate ioeventfd, not exit.


Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.233


How reproducible:
100%

Steps to Reproduce:
1. boot up guest with 232 virtio-blk

result: 
qemu would exit and output "unable to map ioeventfd: -28"
Comment 1 Amos Kong 2012-03-12 07:59:30 UTC 
Talked with mst, we need to resolve bz 753692 by go back
to userspace when fail to allocate ioeventfd.

Need to open a new bug for my kernel fix+backport (bsearch lookup iobus devices)

*** This bug has been marked as a duplicate of bug 753692 ***
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