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Re: [Xen-devel] [FIXED] time still going backwards

To: Tim Freeman <tfreeman@xxxxxxxxxxx>
Subject: Re: [Xen-devel] [FIXED] time still going backwards
From: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>
Date: Sun, 17 Oct 2004 10:30:12 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxxx, Ian.Pratt@xxxxxxxxxxxx
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> btw, for reference, before trying the swap idea, I tried moving the
> masters to a new physical node, it bombed, and the XenU's reported a new
> error:
> 
> __alloc_pages: 0-order allocation failed (gfp=0x1d2/0) 
> VM: killing process PMB-MPI1

This is just the guest kernel running out of memory, and the
out-of-memory killer selecting a victim. Are you sure this VM had
swap configured?
 
> printk("Timer ISR: Time went backwards: %lld %lld %lld\n", delta,
> shadow_system_time, processed_system_time);
> 
> Xen0, just two again:
> Timer ISR: Time went backwards: -59842000 7226230000000 7226290000000
> Timer ISR: Time went backwards: -49988000 7226240000000 7226290000000

That's useful, thanks. I'll take a look at the code.

Ian



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