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xen-users
RE: [Xen-users] "Memory squeeze in netback driver"
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> Marlier, Ian
> Sent: 19 October 2006 17:28
> To: Marlier, Ian; xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] "Memory squeeze in netback driver"
>
> Anyone have thoughts on this? I've googled around, and
> haven't come up
> with anything that I haven't tried already.
>
> And, it severely limits the effectiveness of the Xen environment,
> because I'm now running a machine that appears unable to use more than
> 25% of the available resources...
If you look at linux-<ver>-xen/drivers/xen/netback/netback.c around line
572 (this isn't the latest source, but I don't think it's changed much
in the last week or so), you'll see where the error message comes from.
I'm not sure what the code does tho' - it's got something to do with the
hypercall XENMEM_increase_reservation, but I haven't got time to look at
what that does.
dom0_mem shouldn't be added to the vmlinuz line, but to the xen.gz line
- which I think is the reason your dom0 is showing 12GB. Not sure if
that's got anything to do with the above problem tho'.
--
Mats
>
>
>
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> > Marlier, Ian
> > Sent: Wednesday, October 18, 2006 11:08 AM
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-users] "Memory squeeze in netback driver"
> >
> > Hi, all
> >
> > I'm getting the following in my /var/log/messages file on Dom0:
> > Oct 18 11:00:36 devxen0 kernel: printk: 4 messages suppressed.
> > Oct 18 11:00:36 devxen0 kernel: xen_net: Memory squeeze in
> > netback driver.
> >
> > Which would make sense to me if there were a memory crunch on
> > the box, or in Dom0 alone...but Dom0 has about 12GB of memory
> > availble:
> > devxen0:~ # xm list
> > Name ID Mem(MiB) VCPUs State Time(s)
> > Build5-8-0-km 2 448 1 -b---- 6307.1
> > Build5-8-0-km-DealsFilter 10 448 1 -b---- 33.6
> > Build5-8-0-km-GDS 4 448 1 -b---- 372.6
> > Build5-8-2-zj 8 448 1 -b---- 1696.0
> > Build5-8-2-zj-gds 9 448 1 r----- 24591.1
> > Dale-GDS 7 448 1 -b---- 1759.5
> > Dale-Web 6 448 1 -b---- 2135.7
> > Domain-0 0 12849 4 r----- 5269.6
> > mail 1 128 1 -b---- 294.2
> >
> > Any thoughts/suggestions on what I can do to convince the
> > netback driver to be a little happier with its life?
> >
> > Xen version is 3.0.2_09656-4, running on SUSE Linux 10.1.
> > Kernel is 2.6.16.13-4-xen, stock from the SUSE 10.1 install.
> >
> > Additionally, I've got "dom0_mem=1024M" specified on the
> > kernel command line at boot time. (I'm not sure if that
> > parameter actually does anything, but it doesn't seem to be
> > hurting anything, so...)
> >
> > Thanks!
> >
> > - Ian
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>
>
>
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