i would like to change the page cache size for some
fs/performance tests under 2.4.0-test3/i386.
does anyone know how the right way to do that??
PAGE_SIZE is defined in asm/page.h as (1UL << PAGE_SHIFT)
PAGE_SHIFT for i386 is 12, so PAGE_SIZE is 4096
in linux/pagemap.h PAGE_CACHE_SIZE is defined as PAGE_SHIFT.
there is a (unclear) comment that indicates (in my opinion :)
that page size _will_ probaly increase in future.
so that is what i've tried in order to get a page cache size of
- let's say 8192 in linux/pagemap.h:
original version:
#define PAGE_CACHE_SHIFT PAGE_SHIFT
#define PAGE_CACHE_SIZE PAGE_SIZE
#define PAGE_CACHE_MASK PAGE_MASK
...
my try:
#define PAGE_CACHE_SHIFT 13
#define PAGE_CACHE_SIZE (1UL << PAGE_CACHE_SHIFT)
#define PAGE_CACHE_MASK (~(PAGE_CACHE_SIZE-1))
after rebuilding the kernel and rebooting the system
hangs after mounting root (ext2). no messages.
thx,
Norbert
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Jul 15 2000 - 21:00:14 EST