[lc-checkins] CVS: linux26/include/linux sysctl.h, NONE, 1.1 ccache.h, 1.5, 1.6

[Nitin G. <nit...@us...>]

Update of /cvsroot/linuxcompressed/linux26/include/linux
In directory sc8-pr-cvs6.sourceforge.net:/tmp/cvs-serv24075/include/linux

Modified Files:
	ccache.h 
Added Files:
	sysctl.h 
Log Message:
vswap now doesnt crash. No de/compression. Interfaces now via sysctl so cc_control module not reqd now.

--- NEW FILE ---
/*
 * sysctl.h: General linux system control interface
 *
 * Begun 24 March 1995, Stephen Tweedie
 *
 ****************************************************************
 ****************************************************************
 **
 **  The values in this file are exported to user space via 
 **  the sysctl() binary interface.  However this interface
 **  is unstable and deprecated and will be removed in the future. 
 **  For a stable interface use /proc/sys.
 **
 ****************************************************************
 ****************************************************************
 */

#ifndef _LINUX_SYSCTL_H
#define _LINUX_SYSCTL_H
[...979 lines suppressed...]

/* struct ctl_table_header is used to maintain dynamic lists of
   ctl_table trees. */
struct ctl_table_header
{
	ctl_table *ctl_table;
	struct list_head ctl_entry;
	int used;
	struct completion *unregistering;
};

struct ctl_table_header * register_sysctl_table(ctl_table * table, 
						int insert_at_head);
void unregister_sysctl_table(struct ctl_table_header * table);

#else /* __KERNEL__ */

#endif /* __KERNEL__ */

#endif /* _LINUX_SYSCTL_H */

Index: ccache.h
===================================================================
RCS file: /cvsroot/linuxcompressed/linux26/include/linux/ccache.h,v
retrieving revision 1.5
retrieving revision 1.6
diff -C2 -r1.5 -r1.6
*** ccache.h	11 Jun 2006 20:03:48 -0000	1.5
--- ccache.h	15 Jun 2006 10:24:06 -0000	1.6
***************
*** 5,8 ****
--- 5,31 ----
  #include <linux/page-flags.h>
  #include <linux/swap.h>
+ #include <linux/sysctl.h>
+ 
+ /*
+  * limiting size for anon pages: 512MB (arbitrary)
+  * (units of pages: 4k)
+  */
+ #define LIMIT_ANON_CC_SIZE 512*256
+ 
+ #define MAX_SWAP_OFFSET_SHIFT	24
+ #define MAX_SWAP_OFFSET		(1 << MAX_SWAP_OFFSET_SHIFT)
+ 
+ extern unsigned long max_anon_cc_size, max_fs_backed_cc_size;
+ 
+ /*
+  * max _uncompressed_ size for ccache
+  * (units of pages: 4k)
+  *
+  * For anon pages, ccache size is limited by 'offset' field (24 bits)
+  * of swp_entry_t (swapped out page identifier).
+  * For page cache pages, this limit is artificial but should never
+  * hurt (1<<24 pages == 64GB!).
+  */
+ extern const unsigned long ccache_size_limit;
  
  struct chunk_head {
***************
*** 26,29 ****
--- 49,54 ----
  extern int set_anon_cc_size(unsigned long size);
  extern int should_add_to_ccache(struct page *page);
+ extern int sysctl_max_anon_cc_size(ctl_table *table, int write,
+ 	struct file *file, void __user *buffer, size_t *length, loff_t *ppos);
  
  #endif