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Re: xfsdump stuck in io_schedule

To: zlatko.calusic@xxxxxxxx
Subject: Re: xfsdump stuck in io_schedule
From: Stephen Lord <lord@xxxxxxx>
Date: 17 Nov 2002 07:28:17 -0600
Cc: Andi Kleen <ak@xxxxxxx>, linux-xfs@xxxxxxxxxxx
In-reply-to: <87u1ih4x29.fsf@xxxxxxxxxxxxxx>
References: <dnfzu3yw8u.fsf@xxxxxxxxxxxxxxxxx> <20021115135233.A13882@xxxxxxxxxxxxxxxx> <dnlm3v9ebk.fsf@xxxxxxxxxxxxxxxxx> <20021115140635.A31836@xxxxxxxxxxxxx> <dnr8dmj1i1.fsf@xxxxxxxxxxxxxxxxx> <20021115164012.A28685@xxxxxxxxxxxxx> <87u1ih4x29.fsf@xxxxxxxxxxxxxx>
Sender: linux-xfs-bounce@xxxxxxxxxxx
On Sat, 2002-11-16 at 04:40, Zlatko Calusic wrote:
> Andi Kleen <ak@xxxxxxx> writes:
> 
> >> Hm, to tell the truth, all that doesn't sound like an easy problem to
> >> fix, but I'm sure we'll think of something. :)
> >
> > It may be possible to just hack the user space program to limit 
> > the data currently in flight, but that would likely impact performance
> > somewhat. Better than doing no backups though.
> 
> Before that, I think we should try to fix it properly. Yes, xfsdump is
> blazingly fast and probably that is the reason we have some problems
> with it now, but let's try not to surrender before a fight. :)

The xfsdump folks would be pleased to hear that, we get complaints the
other way sometimes.

You say you are dumping into a file in another filesystem, what type of
filesystem is it? If you stream data there from something like lmdd
does it work OK? Also (and I am not sure you can do this), what happens
if you xfsdump to /dev/null? 

I suspect both of these will work, but worth a try.

Steve

-- 
Stephen  Lord <lord@xxxxxxx>


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