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| author | Mel Gorman | 2012-08-01 01:44:51 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2012-08-01 03:42:47 +0200 |
| commit | 18022c5d8627a7a9ba8097a0f238b513fae6f5b8 (patch) | |
| tree | 57e0d0ec6a5369c56bd00957eb9c0e1220e62917 /mm/page_io.c | |
| parent | mm: methods for teaching filesystems about PG_swapcache pages (diff) | |
| download | kernel-qcow2-linux-18022c5d8627a7a9ba8097a0f238b513fae6f5b8.tar.gz kernel-qcow2-linux-18022c5d8627a7a9ba8097a0f238b513fae6f5b8.tar.xz kernel-qcow2-linux-18022c5d8627a7a9ba8097a0f238b513fae6f5b8.zip | |
mm: add get_kernel_page[s] for pinning of kernel addresses for I/O
This patch adds two new APIs get_kernel_pages() and get_kernel_page() that
may be used to pin a vector of kernel addresses for IO. The initial user
is expected to be NFS for allowing pages to be written to swap using
aops->direct_IO(). Strictly speaking, swap-over-NFS only needs to pin one
page for IO but it makes sense to express the API in terms of a vector and
add a helper for pinning single pages.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-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>
Cc: Mark Salter <msalter@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_io.c')
0 files changed, 0 insertions, 0 deletions