[lc-checkins] CVS: linux/include/linux swap.h,1.18,1.19

[Rodrigo S. de C. <rc...@us...>]

Update of /cvsroot/linuxcompressed/linux/include/linux
In directory sc8-pr-cvs1:/tmp/cvs-serv31487/include/linux

Modified Files:
	swap.h 
Log Message:
Cleanups
o New ifdefs to avoid compiling code for clean page adaptability when
it is disabled.
o Some whitespace changes to make the patch a little shorter.
o Removed variable not used in swapout.c

Bug fixes
o Fixed a bug in comp_cache_fix_watermarks() introduce lately. This
bug would set the watermark to a huge number (due to negative values),
what would end up in a huge increase in the memory
pressure. Fortunately, that is only noticeable when the system has a
low amount of memory.

o vswap_num_reserved_entries variable was used without being
initialized. Depending on the scenario, it could have bogus value
which would screw up compressed cache behaviour.

o The total free space hash was set in function of the
free_space_interval. A potential bug if the total_free_space_interval
is set to a value different from the one in free_space_interval.

o If the compressed cache cannot allocate the minimum number of pages
in the boot process, the shrinkage code could end up annihilate
compressed cache because it assumes the compressed cache will always
have the number of pages equal or greater than the minimum size.



Index: swap.h
===================================================================
RCS file: /cvsroot/linuxcompressed/linux/include/linux/swap.h,v
retrieving revision 1.18
retrieving revision 1.19
diff -C2 -r1.18 -r1.19
*** swap.h	22 Nov 2002 16:01:34 -0000	1.18
--- swap.h	29 Nov 2002 21:23:02 -0000	1.19
***************
*** 179,183 ****
  extern swp_entry_t get_swap_page(void);
  extern void get_swaphandle_info(swp_entry_t, unsigned long *, kdev_t *, 
! 				struct inode **);
  extern int swap_duplicate(swp_entry_t);
  extern int swap_count(struct page *);
--- 179,183 ----
  extern swp_entry_t get_swap_page(void);
  extern void get_swaphandle_info(swp_entry_t, unsigned long *, kdev_t *, 
! 					struct inode **);
  extern int swap_duplicate(swp_entry_t);
  extern int swap_count(struct page *);