Re: migratepage failures on reiserfs

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On (05/11/07 14:46), Christoph Lameter didst pronounce:
> On Mon, 5 Nov 2007, Mel Gorman wrote:
> 
> > The grow_dev_page() pages should be reclaimable even though migration
> > is not supported for those pages? They were marked movable as it was
> > useful for lumpy reclaim taking back pages for hugepage allocations and
> > the like. Would it make sense for memory unremove to attempt migration
> > first and reclaim second?
> 
> Note that a page is still movable even if there is no file system method 
> for migration available. In that case the page needs to be cleaned before 
> it can be moved.
> 

Badari, do you know if the pages failed to migrate because they were
dirty or because the filesystem simply had ownership of the pages and
wouldn't let them go?

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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