Bug 182718

Summary:	Sleeping function called from invalid context at include/asm/uaccess.h:438
Product:	[Fedora] Fedora	Reporter:	Russell Strong <rstrong>
Component:	kernel-xen	Assignee:	Chris Wright <chrisw>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5	CC:	bstein, chrisw
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-xen-2.6.17-1.2577	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-11-13 23:09:27 UTC	Type:	---
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:
Bug Blocks:	179599

Description Russell Strong 2006-02-24 09:05:56 UTC

Description of problem:

Noticed the following in the log.  Sorry if this is a duplicate, I'm not able to
determine that myself.  No other side effects other then these messages in the log.

Feb 24 19:28:49 localhost kernel: Debug: sleeping function called from invalid
context at include/asm/uaccess.h:438
Feb 24 19:28:49 localhost kernel: in_atomic():1, irqs_disabled():0
Feb 24 19:28:49 localhost kernel:  [<c0114773>] __sync_single+0x10a/0x144
Feb 24 19:28:49 localhost kernel:  [<f4a5f567>] qh_completions+0x31f/0x356
[ehci_hcd]
Feb 24 19:28:49 localhost kernel:  [<c0114840>] unmap_single+0x47/0xc5
Feb 24 19:28:49 localhost kernel:  [<c027170e>] usb_hcd_giveback_urb+0x79/0xc3
Feb 24 19:28:49 localhost kernel:  [<f4a5c794>] ehci_urb_done+0x77/0x85 [ehci_hcd]
Feb 24 19:28:49 localhost kernel:  [<f4a5f520>] qh_completions+0x2d8/0x356
[ehci_hcd]
Feb 24 19:28:49 localhost kernel:  [<f4a5f9d3>] ehci_work+0x9e/0x645 [ehci_hcd]
Feb 24 19:28:49 localhost kernel:  [<c02f8d6d>] _spin_unlock_irqrestore+0x9/0x31
Feb 24 19:28:49 localhost kernel:  [<c01195a8>] try_to_wake_up+0x2fd/0x307
Feb 24 19:28:49 localhost kernel:  [<f4a6017d>] ehci_irq+0x138/0x14b [ehci_hcd]
Feb 24 19:28:49 localhost kernel:  [<c02720f6>] usb_hcd_irq+0x26/0x55
Feb 24 19:28:49 localhost kernel:  [<c014033d>] handle_IRQ_event+0x42/0x85
Feb 24 19:28:49 localhost kernel:  [<c014040d>] __do_IRQ+0x8d/0xdc
Feb 24 19:28:49 localhost kernel:  [<c01092a5>] do_IRQ+0x1d/0x28
Feb 24 19:28:49 localhost kernel:  [<c0235a66>] evtchn_do_upcall+0x63/0x9d
Feb 24 19:28:49 localhost kernel:  [<c0107c74>] hypervisor_callback+0x2c/0x34
Feb 24 19:28:49 localhost kernel:  [<c0105bf6>] xen_idle+0x59/0x68
Feb 24 19:28:49 localhost kernel:  [<c0105d09>] cpu_idle+0x8b/0xa4
Feb 24 19:28:49 localhost kernel:  [<c03ca740>] start_kernel+0x325/0x32b


Version-Release number of selected component (if applicable):


How reproducible:


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Additional info:

Comment 1 Chris Wright 2006-02-24 19:25:34 UTC

__copy_to_user can sleep, this is an issue with Xen's swiotlb, which
I'm looking at at the moment.  Thanks for report.

Comment 3 Chris Wright 2006-11-13 23:09:27 UTC

This has been fixed, closing.