Bug 142704

Summary:	page allocation failure - pwc Failed to allocate decompress table
Product:	[Fedora] Fedora	Reporter:	Lonni J Friedman <netllama>
Component:	kernel	Assignee:	Dave Jones <davej>
Status:	CLOSED DUPLICATE	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	medium
Version:	4	CC:	netllama, pfrields, wtogami
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-09-05 05:17:07 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:

Description Lonni J Friedman 2004-12-13 03:08:30 UTC

Description of problem:
I've got a Philips USB webcam that i've been using to grab snapshots
via a cronjob.  Its been working flawlessly for the past 2 weeks, when
all of a sudden this afternoon the cronjob started blowing up and
failing to capture images.  


Version-Release number of selected component (if applicable):
2.6.9-1.681_FC3

I'm using vgrabbj to capture the pictures, but this failure looks to
be coming from the pwc module.
  
Actual results:
The cronjob fails with this error:
Can't open "/dev/video0" as VideoDevice!
Fatal Error (non-daemon), exiting...

However, in the messages log & dmesg I see:

vgrabbj: page allocation failure. order:4, mode:0xd0
 [<02147206>] __alloc_pages+0x28b/0x298
 [<0214722b>] __get_free_pages+0x18/0x24
 [<0214a939>] kmem_getpages+0x15/0x94
 [<0214b6c5>] cache_grow+0x155/0x29a
 [<0214ba17>] cache_alloc_refill+0x20d/0x23d
 [<0214bc9f>] kmem_cache_alloc+0x46/0x4c
 [<12a71250>] pwc_allocate_buffers+0x1bd/0x292 [pwc]
 [<12a723e4>] pwc_video_open+0x196/0x334 [pwc]
 [<1298f187>] video_open+0xf1/0x170 [videodev]
 [<0217068e>] chrdev_open+0x3bd/0x458
 [<02164c5e>] dentry_open+0xbd/0x180
 [<02164b9b>] filp_open+0x36/0x3c
 [<021650b1>] sys_open+0x31/0x7d
pwc Failed to allocate decompress table.

Expected results:
No errors

Comment 1 Dave Jones 2005-02-13 04:28:42 UTC

still a problem in the latest updates ?

Comment 2 Lonni J Friedman 2005-06-22 01:54:15 UTC

Sorry for the delayed response.  This did go away after the update, but is now
back in the kernel that shipped in FC4.  Interestingly, building and installing
version 10.0.7a of the pwc driver from here:
http://www.saillard.org/linux/pwc/files/pwc-10.0.7a.tar.bz2

fixed it.  So perhaps the version of pwc shipping with 2.6.11-1.1369_FC4 is
buggy? *shrug*

Comment 3 Joe Acosta 2005-07-10 22:28:42 UTC

Yes the FC4 kernels and pwc are buggy to say the least.  I did the same thing
with the kernel-2.6.12-1.1390_FC4.  I tried both camE and camsteam and got grey
image.  The grabbed 10.0.7a and now it works again.

Comment 4 Dave Jones 2005-07-15 21:42:28 UTC

[This comment has been added as a mass update for all FC4 kernel bugs.
 If you have migrated this bug from an FC3 bug today, ignore this comment.]

Please retest your problem with todays 2.6.12-1.1398_FC4 update.

If your problem involved being unable to boot, or some hardware not being
detected correctly, please make sure your /etc/modprobe.conf is correct *BEFORE*
installing any kernel updates.
If in doubt, you can recreate this file using..

mv /etc/sysconfig/hwconf /etc/sysconfig/hwconf.bak
mv /etc/modprobe.conf /etc/modprobe.conf.bak
kudzu


Thank you.

Comment 5 Rahul Sundaram 2005-09-05 05:17:07 UTC


*** This bug has been marked as a duplicate of 159608 ***