[PATCH 00/12] Swap-over-NFS without deadlocking V6 · Mel Gorman <mgorman@suse.de> · 2012-06-20
[PATCH 05/12] mm: swap: Implement generic handler for swap_activate · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 05/12] mm: swap: Implement generic handler for swap_activate · Rik van Riel <hidden> · 2012-06-20
[PATCH 06/12] mm: Add get_kernel_page[s] for pinning of kernel addresses for I/O · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 06/12] mm: Add get_kernel_page[s] for pinning of kernel addresses for I/O · Rik van Riel <hidden> · 2012-06-20
[PATCH 12/12] Avoid dereferencing bd_disk during swap_entry_free for network storage · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 12/12] Avoid dereferencing bd_disk during swap_entry_free for network storage · Rik van Riel <hidden> · 2012-06-20
[PATCH 11/12] nfs: Prevent page allocator recursions with swap over NFS. · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 11/12] nfs: Prevent page allocator recursions with swap over NFS. · Rik van Riel <hidden> · 2012-06-20
[PATCH 10/12] nfs: enable swap on NFS · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 10/12] nfs: enable swap on NFS · Rik van Riel <hidden> · 2012-06-20
[PATCH 09/12] nfs: disable data cache revalidation for swapfiles · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 09/12] nfs: disable data cache revalidation for swapfiles · Rik van Riel <hidden> · 2012-06-20
[PATCH 08/12] nfs: teach the NFS client how to treat PG_swapcache pages · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 08/12] nfs: teach the NFS client how to treat PG_swapcache pages · Rik van Riel <hidden> · 2012-06-20
[PATCH 07/12] mm: Add support for direct_IO to highmem pages · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 07/12] mm: Add support for direct_IO to highmem pages · Rik van Riel <hidden> · 2012-06-20
[PATCH 04/12] mm: Add support for a filesystem to activate swap files and use direct_IO for writing swap pages · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 04/12] mm: Add support for a filesystem to activate swap files and use direct_IO for writing swap pages · Rik van Riel <hidden> · 2012-06-20
[PATCH 03/12] mm: Methods for teaching filesystems about PG_swapcache pages · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 03/12] mm: Methods for teaching filesystems about PG_swapcache pages · Rik van Riel <hidden> · 2012-06-20
[PATCH 02/12] selinux: tag avc cache alloc as non-critical · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 02/12] selinux: tag avc cache alloc as non-critical · Rik van Riel <hidden> · 2012-06-20
[PATCH 01/12] netvm: Prevent a stream-specific deadlock · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 01/12] netvm: Prevent a stream-specific deadlock · Mel Gorman <mgorman@suse.de> · 2012-06-20
Re: [PATCH 01/12] netvm: Prevent a stream-specific deadlock · Rik van Riel <hidden> · 2012-06-20

Re: [PATCH 07/12] mm: Add support for direct_IO to highmem pages

From: Rik van Riel <hidden>
Date: 2012-06-20 17:09:28
Also in: linux-mm, linux-nfs, lkml

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<mgorman@suse.de>

Acked-by: Rik van Riel<redacted>

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