Re: Warning on memory offline (and possible in usual migration?)

[Christoph Lameter <clameter@sgi.com>]

On Tue, 6 May 2008, Nick Piggin wrote:

> > Is there any easy way to check if any of the buffers are locked? It would 
> > be good if we could skip the pages with pending I/O on the first migration 
> > passes and only get to them after most of the others have been migrated. 
> > The taking of the buffer locks instead of the page lock defeats the scheme 
> > to defer the difficult migrations till later.
> 
> Can't you just test whether the buffers are locked?

That would mean adding some ugly code that check before we lock the page 
if we will be using buffer_migrate_page() later and then loop over the 
buffers checking for lock bits? 

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