Subject: Re: [RFC][PATCH 0/4] VM deadlock prevention -v4

From: Rik van Riel <[email-masked]>
Date: Mon, 14 Aug 2006 08:21:27 -0400

Evgeniy Polyakov wrote:
> On Sun, Aug 13, 2006 at 05:42:47PM -0700, Daniel Phillips ([email-masked]) wrote:

>> As for sk_buff cow break, we need to look at which network paths do it
>> (netfilter obviously, probably others) and decide whether we just want
>> to declare that the feature breaks network block IO, or fix the feature
>> so it plays well with reserve accounting.
> 
> I would suggest to consider skb cow (cloning) as a must.

That should not be any problem, since skb's (including cowed ones)
are short lived anyway.  Allocating a little bit more memory is
fine when we have a guarantee that the memory will be freed again
shortly.

-- 
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