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SubjectRe: [PATCH 07/12] mm: Add support for direct_IO to highmem pages
On 06/20/2012 05:37 AM, Mel Gorman wrote:
> The patch "mm: Add support for a filesystem to activate swap files and
> use direct_IO for writing swap pages" added support for using direct_IO
> to write swap pages but it is insufficient for highmem pages.
> To support highmem pages, this patch kmaps() the page before calling the
> direct_IO() handler. As direct_IO deals with virtual addresses an
> additional helper is necessary for get_kernel_pages() to lookup the
> struct page for a kmap virtual address.
> Signed-off-by: Mel Gorman<>

Acked-by: Rik van Riel<>

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