diff options
| author | Mel Gorman <mgorman@suse.de> | 2012-07-31 19:45:12 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 21:42:48 -0400 |
| commit | a564b8f0398636ba30b07c0eaebdef7ff7837249 (patch) | |
| tree | 10478aa5cfb2a3696db34618a479413b358c3831 /fs/nfs/Kconfig | |
| parent | 29418aa4bd487c82016733ef5c6a06d656ed3c7d (diff) | |
nfs: enable swap on NFS
Implement the new swapfile a_ops for NFS and hook up ->direct_IO. This
will set the NFS socket to SOCK_MEMALLOC and run socket reconnect under
PF_MEMALLOC as well as reset SOCK_MEMALLOC before engaging the protocol
->connect() method.
PF_MEMALLOC should allow the allocation of struct socket and related
objects and the early (re)setting of SOCK_MEMALLOC should allow us to
receive the packets required for the TCP connection buildup.
[jlayton@redhat.com: Restore PF_MEMALLOC task flags in all cases]
[dfeng@redhat.com: Fix handling of multiple swap files]
[a.p.zijlstra@chello.nl: Original patch]
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: 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 'fs/nfs/Kconfig')
| -rw-r--r-- | fs/nfs/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig index 404c6a8ac394..6fd5f2cdcd1e 100644 --- a/fs/nfs/Kconfig +++ b/fs/nfs/Kconfig | |||
| @@ -86,6 +86,14 @@ config NFS_V4 | |||
| 86 | 86 | ||
| 87 | If unsure, say Y. | 87 | If unsure, say Y. |
| 88 | 88 | ||
| 89 | config NFS_SWAP | ||
| 90 | bool "Provide swap over NFS support" | ||
| 91 | default n | ||
| 92 | depends on NFS_FS | ||
| 93 | select SUNRPC_SWAP | ||
| 94 | help | ||
| 95 | This option enables swapon to work on files located on NFS mounts. | ||
| 96 | |||
| 89 | config NFS_V4_1 | 97 | config NFS_V4_1 |
| 90 | bool "NFS client support for NFSv4.1 (EXPERIMENTAL)" | 98 | bool "NFS client support for NFSv4.1 (EXPERIMENTAL)" |
| 91 | depends on NFS_V4 && EXPERIMENTAL | 99 | depends on NFS_V4 && EXPERIMENTAL |