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| author | Mel Gorman <mgorman@suse.de> | 2012-07-31 16:45:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 18:42:47 -0700 |
| commit | 5a178119b0fbe37f7dfb602b37df9cc4b1dc9d71 (patch) | |
| tree | 22ddd286aac202ccb8c063f02792fc9c90a0b8da /mm/swap.c | |
| parent | a509bc1a9e487d952d9404318f7f990166ab57a7 (diff) | |
| download | linux-5a178119b0fbe37f7dfb602b37df9cc4b1dc9d71.tar.gz linux-5a178119b0fbe37f7dfb602b37df9cc4b1dc9d71.tar.bz2 linux-5a178119b0fbe37f7dfb602b37df9cc4b1dc9d71.zip | |
mm: add support for direct_IO to highmem pages
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 <riel@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: Eric Paris <eparis@redhat.com>
Cc: James Morris <jmorris@namei.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: Neil Brown <neilb@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Xiaotian Feng <dfeng@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap.c')
| -rw-r--r-- | mm/swap.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/swap.c b/mm/swap.c index 7d7f80c8044a..77825883298f 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -258,8 +258,7 @@ int get_kernel_pages(const struct kvec *kiov, int nr_segs, int write, if (WARN_ON(kiov[seg].iov_len != PAGE_SIZE)) return seg; - /* virt_to_page sanity checks the PFN */ - pages[seg] = virt_to_page(kiov[seg].iov_base); + pages[seg] = kmap_to_page(kiov[seg].iov_base); page_cache_get(pages[seg]); } |