diff options
| author | Brian Behlendorf <[email protected]> | 2014-10-01 18:34:41 -0400 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2014-10-17 15:11:51 -0700 |
| commit | 8bbbe46f8680389888d6111f8d81429dcc5defac (patch) | |
| tree | 5c4aaeafb2ef237e884021082fac39bb373f2dcf /include/linux | |
| parent | e1310afae3bdb17628b40c35561f2daedfaf4062 (diff) | |
Remove global memory variables
Platforms such as Illumos and FreeBSD have historically provided
global variables which summerize the memory state of a system.
Linux on the otherhand doesn't expose any of this information
to kernel modules and uses entirely different mechanisms for
memory management.
In order to simplify the original ZFS port to Linux these global
variables were emulated by the SPL for the benefit of ZFS. As ZoL
has matured over the years it has moved steadily away from these
interfaces and now no longer depends on them at all.
Therefore, this patch completely removes the global variables
availrmem, minfree, desfree, lotsfree, needfree, swapfs_minfree,
and swapfs_reserve. This greatly simplifies the memory management
code and eliminates a common area of confusion.
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm_compat.h | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/include/linux/mm_compat.h b/include/linux/mm_compat.h index 37c9b0875..97e5af012 100644 --- a/include/linux/mm_compat.h +++ b/include/linux/mm_compat.h @@ -28,22 +28,6 @@ #include <linux/mm.h> #include <linux/fs.h> -/* - * Linux 2.6.31 API Change. - * Individual pages_{min,low,high} moved in to watermark array. - */ -#ifndef min_wmark_pages -#define min_wmark_pages(z) (z->pages_min) -#endif - -#ifndef low_wmark_pages -#define low_wmark_pages(z) (z->pages_low) -#endif - -#ifndef high_wmark_pages -#define high_wmark_pages(z) (z->pages_high) -#endif - #if !defined(HAVE_SHRINK_CONTROL_STRUCT) struct shrink_control { gfp_t gfp_mask; |