ChangeSet 1.1408, 2005/03/31 10:56:18+01:00, kaf24@xxxxxxxxxxxxxxxxxxxx
Merge firebug.cl.cam.ac.uk:/local/scratch/kaf24/xen-2.0-testing.bk
into firebug.cl.cam.ac.uk:/local/scratch/kaf24/xen-unstable.bk
page_alloc.c | 102 +++++++++++++++++++++++++++--------------------------------
1 files changed, 47 insertions(+), 55 deletions(-)
diff -Nru a/xen/common/page_alloc.c b/xen/common/page_alloc.c
--- a/xen/common/page_alloc.c 2005-03-31 05:02:51 -05:00
+++ b/xen/common/page_alloc.c 2005-03-31 05:02:51 -05:00
@@ -24,12 +24,14 @@
#include <xen/init.h>
#include <xen/types.h>
#include <xen/lib.h>
-#include <asm/page.h>
+#include <xen/perfc.h>
+#include <xen/sched.h>
#include <xen/spinlock.h>
#include <xen/slab.h>
#include <xen/irq.h>
#include <xen/softirq.h>
#include <asm/domain_page.h>
+#include <asm/page.h>
/*
* Comma-separated list of hexadecimal page numbers containing bad bytes.
@@ -53,8 +55,9 @@
static unsigned long *alloc_bitmap;
#define PAGES_PER_MAPWORD (sizeof(unsigned long) * 8)
-#define allocated_in_map(_pn) \
-(alloc_bitmap[(_pn)/PAGES_PER_MAPWORD] & (1<<((_pn)&(PAGES_PER_MAPWORD-1))))
+#define allocated_in_map(_pn) \
+( !! (alloc_bitmap[(_pn)/PAGES_PER_MAPWORD] & \
+ (1UL<<((_pn)&(PAGES_PER_MAPWORD-1)))) )
/*
* Hint regarding bitwise arithmetic in map_{alloc,free}:
@@ -83,13 +86,13 @@
if ( curr_idx == end_idx )
{
- alloc_bitmap[curr_idx] |= ((1<<end_off)-1) & -(1<<start_off);
+ alloc_bitmap[curr_idx] |= ((1UL<<end_off)-1) & -(1UL<<start_off);
}
else
{
- alloc_bitmap[curr_idx] |= -(1<<start_off);
- while ( ++curr_idx < end_idx ) alloc_bitmap[curr_idx] = ~0L;
- alloc_bitmap[curr_idx] |= (1<<end_off)-1;
+ alloc_bitmap[curr_idx] |= -(1UL<<start_off);
+ while ( ++curr_idx < end_idx ) alloc_bitmap[curr_idx] = ~0UL;
+ alloc_bitmap[curr_idx] |= (1UL<<end_off)-1;
}
}
@@ -112,13 +115,13 @@
if ( curr_idx == end_idx )
{
- alloc_bitmap[curr_idx] &= -(1<<end_off) | ((1<<start_off)-1);
+ alloc_bitmap[curr_idx] &= -(1UL<<end_off) | ((1UL<<start_off)-1);
}
else
{
- alloc_bitmap[curr_idx] &= (1<<start_off)-1;
+ alloc_bitmap[curr_idx] &= (1UL<<start_off)-1;
while ( ++curr_idx != end_idx ) alloc_bitmap[curr_idx] = 0;
- alloc_bitmap[curr_idx] &= -(1<<end_off);
+ alloc_bitmap[curr_idx] &= -(1UL<<end_off);
}
}
@@ -167,7 +170,7 @@
if ( (bad_pfn < (bitmap_size*8)) && !allocated_in_map(bad_pfn) )
{
- printk("Marking page %08lx as bad\n", bad_pfn);
+ printk("Marking page %p as bad\n", bad_pfn);
map_alloc(bad_pfn, 1);
}
}
@@ -206,8 +209,8 @@
#define MEMZONE_DOM 1
#define NR_ZONES 2
-/* Up to 2^10 pages can be allocated at once. */
-#define MAX_ORDER 10
+/* Up to 2^20 pages can be allocated at once. */
+#define MAX_ORDER 20
static struct list_head heap[NR_ZONES][MAX_ORDER+1];
static unsigned long avail[NR_ZONES];
@@ -265,8 +268,8 @@
/* Find smallest order which can satisfy the request. */
for ( i = order; i <= MAX_ORDER; i++ )
- if ( !list_empty(&heap[zone][i]) )
- goto found;
+ if ( !list_empty(&heap[zone][i]) )
+ goto found;
/* No suitable memory blocks. Fail the request. */
spin_unlock(&heap_lock);
@@ -413,9 +416,8 @@
{
unsigned long flags;
struct pfn_info *pg;
- int i, attempts = 0;
+ int i;
- retry:
local_irq_save(flags);
pg = alloc_heap_pages(MEMZONE_XEN, order);
local_irq_restore(flags);
@@ -428,21 +430,14 @@
for ( i = 0; i < (1 << order); i++ )
{
pg[i].count_info = 0;
- pg[i].u.inuse.domain = NULL;
+ pg[i].u.inuse._domain = 0;
pg[i].u.inuse.type_info = 0;
}
return (unsigned long)page_to_virt(pg);
no_memory:
- if ( attempts++ < 8 )
- {
- xmem_cache_reap();
- goto retry;
- }
-
printk("Cannot handle page request order %d!\n", order);
- dump_slabinfo();
return 0;
}
@@ -478,55 +473,42 @@
struct pfn_info *alloc_domheap_pages(struct domain *d, unsigned int order)
{
struct pfn_info *pg;
- unsigned long mask, flushed_mask, pfn_stamp, cpu_stamp;
- int i, j;
+ unsigned long mask = 0;
+ int i;
ASSERT(!in_irq());
if ( unlikely((pg = alloc_heap_pages(MEMZONE_DOM, order)) == NULL) )
return NULL;
- flushed_mask = 0;
for ( i = 0; i < (1 << order); i++ )
{
- if ( (mask = (pg[i].u.free.cpu_mask & ~flushed_mask)) != 0 )
- {
- pfn_stamp = pg[i].tlbflush_timestamp;
- for ( j = 0; (mask != 0) && (j < smp_num_cpus); j++ )
- {
- if ( mask & (1<<j) )
- {
- cpu_stamp = tlbflush_time[j];
- if ( !NEED_FLUSH(cpu_stamp, pfn_stamp) )
- mask &= ~(1<<j);
- }
- }
-
- if ( unlikely(mask != 0) )
- {
- flush_tlb_mask(mask);
- perfc_incrc(need_flush_tlb_flush);
- flushed_mask |= mask;
- }
- }
+ mask |= tlbflush_filter_cpuset(
+ pg[i].u.free.cpu_mask & ~mask, pg[i].tlbflush_timestamp);
pg[i].count_info = 0;
- pg[i].u.inuse.domain = NULL;
+ pg[i].u.inuse._domain = 0;
pg[i].u.inuse.type_info = 0;
}
+ if ( unlikely(mask != 0) )
+ {
+ perfc_incrc(need_flush_tlb_flush);
+ flush_tlb_mask(mask);
+ }
+
if ( d == NULL )
return pg;
spin_lock(&d->page_alloc_lock);
- if ( unlikely(test_bit(DF_DYING, &d->flags)) ||
+ if ( unlikely(test_bit(DF_DYING, &d->d_flags)) ||
unlikely((d->tot_pages + (1 << order)) > d->max_pages) )
{
DPRINTK("Over-allocation for domain %u: %u > %u\n",
d->id, d->tot_pages + (1 << order), d->max_pages);
DPRINTK("...or the domain is dying (%d)\n",
- !!test_bit(DF_DYING, &d->flags));
+ !!test_bit(DF_DYING, &d->d_flags));
spin_unlock(&d->page_alloc_lock);
free_heap_pages(MEMZONE_DOM, pg, order);
return NULL;
@@ -539,7 +521,7 @@
for ( i = 0; i < (1 << order); i++ )
{
- pg[i].u.inuse.domain = d;
+ page_set_owner(&pg[i], d);
wmb(); /* Domain pointer must be visible before updating refcnt. */
pg[i].count_info |= PGC_allocated | 1;
list_add_tail(&pg[i].list, &d->page_list);
@@ -554,7 +536,7 @@
void free_domheap_pages(struct pfn_info *pg, unsigned int order)
{
int i, drop_dom_ref;
- struct domain *d = pg->u.inuse.domain;
+ struct domain *d = page_get_owner(pg);
ASSERT(!in_irq());
@@ -580,7 +562,7 @@
{
ASSERT((pg[i].u.inuse.type_info & PGT_count_mask) == 0);
pg[i].tlbflush_timestamp = tlbflush_current_time();
- pg[i].u.free.cpu_mask = 1 << d->processor;
+ pg[i].u.free.cpu_mask = d->cpuset;
list_del(&pg[i].list);
}
@@ -589,7 +571,7 @@
spin_unlock_recursive(&d->page_alloc_lock);
- if ( likely(!test_bit(DF_DYING, &d->flags)) )
+ if ( likely(!test_bit(DF_DYING, &d->d_flags)) )
{
free_heap_pages(MEMZONE_DOM, pg, order);
}
@@ -681,3 +663,13 @@
return 0;
}
__initcall(page_scrub_init);
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
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