netdev - Re: xfrm_state locking regression...

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Message-ID: <20080910054625.GA26821@gondor.apana.org.au>
Date:	Wed, 10 Sep 2008 15:46:25 +1000
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	timo.teras@....fi, netdev@...r.kernel.org
Subject: Re: xfrm_state locking regression...

On Tue, Sep 09, 2008 at 10:23:30PM -0700, David Miller wrote:
> 
> That's a good point, the hash resizing case.
> 
> If the hash grows, we'll see some entries again.
> 
> If it shrinks, we might skip some instead, which is very undesirable.
> 
> Actually, thinking about it some more, both possibilities (skipping
> and dups) seem to be possible in both situations (growing and
> shrinking).
> 
> Ehm... I think we should put this patch and idea aside for a little bit.
> :-)

Yeah the hash resizing thing really kills this approach.  In fact
it seems that the original walker was written before resizing was
added.

I definitely agree that ordering isn't as important as showing the
entries reliably.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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