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| author | Dan Magenheimer <dan.magenheimer@oracle.com> | 2013-05-01 00:27:00 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-01 02:04:01 +0200 |
| commit | 10a7a0771399a57a297fca9615450dbb3f88081a (patch) | |
| tree | 7c8564daf7ce2698277a4a38edb9ef0f636cb429 /include/xen | |
| parent | mm: cleancache: clean up cleancache_enabled (diff) | |
| download | linux-10a7a0771399a57a297fca9615450dbb3f88081a.tar.xz linux-10a7a0771399a57a297fca9615450dbb3f88081a.zip | |
xen: tmem: enable Xen tmem shim to be built/loaded as a module
Allow Xen tmem shim to be built/loaded as a module. Xen self-ballooning
and frontswap-selfshrinking are now also "lazily" initialized when the
Xen tmem shim is loaded as a module, unless explicitly disabled by
module parameters.
Note runtime dependency disallows loading if cleancache/frontswap lazy
initialization patches are not present.
If built-in (not built as a module), the original mechanism of enabling
via a kernel boot parameter is retained, but this should be considered
deprecated.
Note that module unload is explicitly not yet supported.
[v1: Removed the [CLEANCACHE|FRONTSWAP]_HAS_LAZY_INIT ifdef]
[v2: Squashed the xen/tmem: Remove the subsys call patch in]
[akpm@linux-foundation.org: fix build (disable_frontswap_selfshrinking undeclared)]
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Andor Daam <andor.daam@googlemail.com>
Cc: Florian Schmaus <fschmaus@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Stefan Hengelein <ilendir@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/tmem.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/xen/tmem.h b/include/xen/tmem.h index 591550a22ac7..3930a90045ff 100644 --- a/include/xen/tmem.h +++ b/include/xen/tmem.h @@ -3,7 +3,15 @@ #include <linux/types.h> +#ifdef CONFIG_XEN_TMEM_MODULE +#define tmem_enabled true +#else /* defined in drivers/xen/tmem.c */ extern bool tmem_enabled; +#endif + +#ifdef CONFIG_XEN_SELFBALLOONING +extern int xen_selfballoon_init(bool, bool); +#endif #endif /* _XEN_TMEM_H */ |