RE: [Xen-devel] hdc: lost interrupt

[Adam Sulmicki <adam@xxxxxxxxxxxx>]

> > I am seeing a kernel message, "hdc: lost interrupt", when
> > running LTP on
> > the xen0 domain.  The first time I saw the 'kernel: hdc: lost
> > interrupt'
> > in /var/log/messages, I was running LTP on both xen0 and xenU
> > domains.
> We've had one or two reports of interrupt related weirdness. We're
> hoping (perhaps optimistically) that these might go away when the IOAPIC
> configuration code gets moved out of Xen and into domain 0, getting
> upgraded to 2.6 code in the process.
I'm not sure if it is xen related or not but when I put following in 
/etc/exports
        /       10.0.10.5/24(ro,sync,no_root_squash)

and then procedeed to use dom0 as nfs root server, it would hung pretty 
reliably with "dma timeout" errors, and require power-cycle. the fix was 
to replace "sync" with "async" as shown below.
        /       10.0.10.5/24(ro,async,no_root_squash)

that was for xen 2.0.1 and 2.6.9

FWIW.



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