[Fedora-xen] RE: [Xen-users] memory issues with FC5.2200 kernels

["Petersson, Mats" <Mats Petersson amd com>]

> -----Original Message-----
> From: xen-users-bounces lists xensource com 
> [mailto:xen-users-bounces lists xensource com] On Behalf Of 
> Adrian Chadd
> Sent: 07 November 2006 13:37
> To: fedora-xen redhat com
> Cc: xen-users lists xensource com
> Subject: [Xen-users] memory issues with FC5.2200 kernels
> 
> hiya,
> 
> I've just upgraded a production Xen to FC5.2200 + the Xen userspace
> stuff and its exhibiting some nasty problems. A couple of hours uptime
> is followed by all domU networking stopping.
> 
> Here's dmesg in dom0:
> 
> xen_net: Memory squeeze in netback driver.
> printk: 4 messages suppressed.
> xen_net: Memory squeeze in netback driver.
> printk: 4 messages suppressed.
> 
> And xm dmesg:
> 
> (XEN) (file=memory.c, line=66) Could not allocate order=0 
> extent: id=0 memflags=0 (0 of 63)
> (XEN) (file=memory.c, line=66) Could not allocate order=0 
> extent: id=0 memflags=0 (0 of 63)
> (XEN) (file=memory.c, line=66) Could not allocate order=0 
> extent: id=0 memflags=0 (0 of 63)
> (XEN) (file=memory.c, line=66) Could not allocate order=0 
> extent: id=0 memflags=0 (0 of 63)
> (XEN) (file=memory.c, line=66) Could not allocate order=0 
> extent: id=0 memflags=0 (0 of 63)

It is trying to allocate one page in "increase_reservation", and
failing... 

I don't know WHY this is failing (I suspect the heap may have a memory
leak, perhaps)?

What is your DomU doing when you see this problem?

--
Mats
> 
> Googling has shown inconclusive results - a couple of 
> possible fixes but no explanation
> why (and no consistent fix.)
> 
> Any ideas?
> 
> Thanks,
> 
> 
> Adrian
> 
> 
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