[OpenAFS] multiplt kernel call traces

ematlis@yahoo.com ematlis@yahoo.com
Mon, 15 Mar 2010 07:08:48 -0700 (PDT)

Thank you so much for your prompt reply.=0A=0AAs a follow up to your respon=
se- will this problem "go away" for kernel version 2.6.33?  If so, perhaps =
I can upgrade to that version.=0A=0AAs an alternative- can I fix this by do=
wngrading the kernel to some lesser version (say 2.6.30)?=0A=0ABy the way, =
this issue has bitten me in the past by causing my system to create such la=
rge /var/log/messages files that the filesystem reached 100%.  I fixed that=
 by adding =0A=0A:msg, contains, "ima_file_free"         ~=0A:msg, contains=
, "iint_free"             ~=0A=0Ato /etc/rsyslog.conf as per an earlier sug=
gestion of yours.=0A=0AI found I needed pam-afs-session; is the library pro=
vided in the rpm going to be included in the default openafs packages?=0A=
=0ALastly- since I run Fedora, which now provides openafs by their own repo=
sitories, which repository would you recommend- theirs or yours?=0A=0A--- O=
n Mon, 3/15/10, Simon Wilkinson <sxw@inf.ed.ac.uk> wrote:=0A=0A> From: Simo=
n Wilkinson <sxw@inf.ed.ac.uk>=0A> Subject: Re: [OpenAFS] multiplt kernel c=
all traces=0A> To: ematlis@yahoo.com=0A> Cc: openafs-info@openafs.org=0A> D=
ate: Monday, March 15, 2010, 8:45 AM=0A> =0A> On 15 Mar 2010, at 13:35, ema=
tlis@yahoo.com=0A> wrote:=0A> =0A> > I'm getting many, but I mean, many cal=
l traces with=0A> openafs on my Fedora 12 x86_64 system running recent=0A> =
kernels.=A0 I've included one below.=A0 Is this a real=0A> kernel crash, an=
d if so, is there a fix for this?=A0 Or=0A> is it harmless?=0A> =0A> This i=
s the IMA problem that's popped up here in the past,=0A> and is being track=
ed by RT #125704=0A> =0A> These aren't ooopses or panics - they're simply c=
alls to=0A> dump_stack(). The main problem with them is that they can=0A> s=
ignificantly slow down your machine - you'll get one output=0A> for every f=
ile in your cache directory upon startup, and=0A> you'll probably also see =
them in normal operation. Sadly,=0A> this is a problem with the Linux kerne=
l that we can't fix -=0A> the IMA interface in 2.6.31 and 2.6.32 is broken,=
 and=0A> unusable by out of tree filesystems. The interface has been=0A> co=
mpletely redesigned in 2.6.33.=0A> =0A> You can fix this if you're prepared=
 to rebuild your kernel,=0A> and disable the CONFIG_IMA option.=0A> =0A> Ho=
pe that helps,=0A> =0A> Simon.=0A> =0A> =0A=0A=0A