netdev - Re: [PATCH RFC 1/2] flow: virtualize get and entry deletion methods

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Message-ID: <20100329084018.GA22547@gondor.apana.org.au>
Date:	Mon, 29 Mar 2010 16:40:18 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	timo.teras@....fi, netdev@...r.kernel.org
Subject: Re: [PATCH RFC 1/2] flow: virtualize get and entry deletion methods

On Thu, Mar 25, 2010 at 12:26:11PM -0700, David Miller wrote:
>
> Maybe we can make the dead state check safe to do asynchronously
> somehow?  I wonder if the policy layer is overdue for an RCU
> conversion or similar.

In fact, now that I read this again, we don't even need to grab
the lock to perform the deadness check.  This is because the
existing never did it anyway.  The liveliness is guaranteed by
the policy destruction code doing a synchronous cache flush.

Timo, what was the reason for getting rid of the synchronous
flush again?

Thanks,
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