Re: [PATCH -mm] cpuset,mm: fix no node to alloc memory whenchanging cpuset's mems - fix2

[Andrew Morton]

On Thu, 13 May 2010 14:16:33 +0800
Miao Xie <miaox@xxxxxxxxxxxxxx> wrote:

> > 
> > The code you have at present is fairly similar to sequence locks.  I
> > wonder if there's some way of (ab)using sequence locks for this. 
> > seqlocks don't have lockdep support either...
> > 
> 
> We can't use sequence locks here, because the read-side may read the data
> in changing, but it can't put off cleaning the old bits.

I don't understand that sentence.  Can you expand on it please?
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