is anything wrong in this?
--- vm_fault.c.orig Fri Aug 3 15:01:27 2007
+++ vm_fault.c Thu Aug 2 15:56:17 2007
@@ -113,8 +113,8 @@
static int vm_fault_additional_pages(vm_page_t, int, int, vm_page_t *, int *);
static void vm_fault_prefault(pmap_t, vm_offset_t, vm_map_entry_t);
-#define VM_FAULT_READ_AHEAD 8
-#define VM_FAULT_READ_BEHIND 7
+#define VM_FAULT_READ_AHEAD 64
+#define VM_FAULT_READ_BEHIND 63
#define VM_FAULT_READ (VM_FAULT_READ_AHEAD+VM_FAULT_READ_BEHIND+1)
struct faultstate {
and
--- param.h.orig Fri Aug 3 15:02:37 2007
+++ param.h Wed Jul 11 11:46:24 2007
@@ -125,7 +125,7 @@
#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
#endif
#ifndef MAXPHYS
-#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
+#define MAXPHYS (512 * 1024) /* max raw I/O transfer size */
#endif
#ifndef MAXDUMPPGS
#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE)
both works for me and gives noticable speedup, when operating on big files and
when starting big apps or swapping.
other question (swap_pager.c):
/*
* SWB_NPAGES must be a power of 2. It may be set to 1, 2, 4, 8, or 16
* pages per allocation. We recommend you stick with the default of 8.
* The 16-page limit is due to the radix code (kern/subr_blist.c).
*/
#ifndef MAX_PAGEOUT_CLUSTER
#define MAX_PAGEOUT_CLUSTER 16
#endif
can this be changed/fixed? 64-128 would be nicer...
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