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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 2/3] Replace slab caches with typesafe allocs...
Slab caches for things allocated only on initialization seems to be
overkill. This patch replaces them with the previous typesafe
allocator.
(Oops, forgot to sign off previous patch: please consider this to apply
to both).
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx> (authored)
diff -urpN --exclude TAGS -X
/home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal
xen-unstable-typesafe/xen/arch/x86/domain.c
xen-unstable-working/xen/arch/x86/domain.c
--- xen-unstable-typesafe/xen/arch/x86/domain.c 2005-01-30 15:28:47.000000000
+1100
+++ xen-unstable-working/xen/arch/x86/domain.c 2005-01-31 18:05:15.000000000
+1100
@@ -223,42 +223,24 @@ void dump_pageframe_info(struct domain *
page->u.inuse.type_info);
}
-xmem_cache_t *domain_struct_cachep;
-xmem_cache_t *exec_domain_struct_cachep;
-
-void __init domain_startofday(void)
-{
- domain_struct_cachep = xmem_cache_create(
- "domain_cache", sizeof(struct domain),
- 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
- if ( domain_struct_cachep == NULL )
- panic("No slab cache for domain structs.");
-
- exec_domain_struct_cachep = xmem_cache_create(
- "exec_dom_cache", sizeof(struct exec_domain),
- 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
- if ( exec_domain_struct_cachep == NULL )
- BUG();
-}
-
struct domain *arch_alloc_domain_struct(void)
{
- return xmem_cache_alloc(domain_struct_cachep);
+ return new(struct domain);
}
void arch_free_domain_struct(struct domain *d)
{
- xmem_cache_free(domain_struct_cachep, d);
+ xfree(d);
}
struct exec_domain *arch_alloc_exec_domain_struct(void)
{
- return xmem_cache_alloc(exec_domain_struct_cachep);
+ return new(struct exec_domain);
}
void arch_free_exec_domain_struct(struct exec_domain *ed)
{
- xmem_cache_free(exec_domain_struct_cachep, ed);
+ xfree(ed);
}
void free_perdomain_pt(struct domain *d)
diff -urpN --exclude TAGS -X
/home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal
xen-unstable-typesafe/xen/arch/x86/setup.c
xen-unstable-working/xen/arch/x86/setup.c
--- xen-unstable-typesafe/xen/arch/x86/setup.c 2005-01-30 15:28:50.000000000
+1100
+++ xen-unstable-working/xen/arch/x86/setup.c 2005-01-31 18:05:41.000000000
+1100
@@ -598,8 +598,6 @@ void __init __start_xen(multiboot_info_t
xmem_cache_init();
xmem_cache_sizes_init(max_page);
- domain_startofday();
-
start_of_day();
grant_table_init();
diff -urpN --exclude TAGS -X
/home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal
xen-unstable-typesafe/xen/common/sched_atropos.c
xen-unstable-working/xen/common/sched_atropos.c
--- xen-unstable-typesafe/xen/common/sched_atropos.c 2005-01-31
18:14:24.000000000 +1100
+++ xen-unstable-working/xen/common/sched_atropos.c 2005-01-31
17:36:49.000000000 +1100
@@ -69,8 +69,6 @@ struct at_cpu_info
static void at_dump_cpu_state(int cpu);
-static xmem_cache_t *dom_info_cache;
-
static inline void __add_to_runqueue_head(struct domain *d)
{
list_add(RUNLIST(d), RUNQ(d->processor));
@@ -558,10 +556,6 @@ static int at_init_scheduler()
INIT_LIST_HEAD(RUNQ(i));
}
- dom_info_cache = xmem_cache_create("Atropos dom info",
- sizeof(struct at_dom_info),
- 0, 0, NULL, NULL);
-
return 0;
}
@@ -649,7 +643,7 @@ static int at_adjdom(struct domain *p, s
/* free memory associated with a task */
static void at_free_task(struct domain *p)
{
- xmem_cache_free( dom_info_cache, DOM_INFO(p) );
+ xfree( DOM_INFO(p) );
}
diff -urpN --exclude TAGS -X
/home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal
xen-unstable-typesafe/xen/common/sched_bvt.c
xen-unstable-working/xen/common/sched_bvt.c
--- xen-unstable-typesafe/xen/common/sched_bvt.c 2005-01-31
18:14:24.000000000 +1100
+++ xen-unstable-working/xen/common/sched_bvt.c 2005-01-31 18:05:05.000000000
+1100
@@ -71,8 +71,6 @@ struct bvt_cpu_info
#define TIME_SLOP (s32)MICROSECS(50) /* allow time to slip a bit */
static s32 ctx_allow = (s32)MILLISECS(5); /* context switch allowance */
-static xmem_cache_t *dom_info_cache;
-
static inline void __add_to_runqueue_head(struct exec_domain *d)
{
list_add(RUNLIST(d), RUNQUEUE(d->processor));
@@ -173,7 +171,7 @@ int bvt_alloc_task(struct exec_domain *e
{
struct domain *d = ed->domain;
if ( (d->sched_priv == NULL) ) {
- if ( (d->sched_priv = xmem_cache_alloc(dom_info_cache)) == NULL )
+ if ( (d->sched_priv = new(struct bvt_dom_info)) == NULL )
return -1;
memset(d->sched_priv, 0, sizeof(struct bvt_dom_info));
}
@@ -295,7 +293,7 @@ static void bvt_sleep(struct exec_domain
void bvt_free_task(struct domain *d)
{
ASSERT(d->sched_priv != NULL);
- xmem_cache_free(dom_info_cache, d->sched_priv);
+ xfree(d->sched_priv);
}
/* Control the scheduler. */
@@ -570,14 +568,6 @@ int bvt_init_scheduler()
CPU_SVT(i) = 0; /* XXX do I really need to do this? */
}
- dom_info_cache = xmem_cache_create(
- "BVT dom info", sizeof(struct bvt_dom_info), 0, 0, NULL, NULL);
- if ( dom_info_cache == NULL )
- {
- printk("BVT: Failed to allocate domain info SLAB cache");
- return -1;
- }
-
return 0;
}
diff -urpN --exclude TAGS -X
/home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal
xen-unstable-typesafe/xen/common/sched_rrobin.c
xen-unstable-working/xen/common/sched_rrobin.c
--- xen-unstable-typesafe/xen/common/sched_rrobin.c 2005-01-30
15:28:39.000000000 +1100
+++ xen-unstable-working/xen/common/sched_rrobin.c 2005-01-31
17:36:49.000000000 +1100
@@ -27,8 +27,6 @@ struct rrobin_dom_info
#define RUNLIST(d) ((struct list_head *)&(RR_INFO(d)->run_list))
#define RUNQUEUE(cpu) RUNLIST(schedule_data[cpu].idle)
-static xmem_cache_t *dom_info_cache;
-
static inline void __add_to_runqueue_head(struct domain *d)
{
list_add(RUNLIST(d), RUNQUEUE(d->processor));
@@ -59,21 +57,12 @@ static int rr_init_scheduler()
for ( i = 0; i < NR_CPUS; i++ )
INIT_LIST_HEAD(RUNQUEUE(i));
- dom_info_cache = xmem_cache_create(
- "RR dom info", sizeof(struct rrobin_dom_info), 0, 0, 0, NULL);
- if ( dom_info_cache == NULL )
- {
- printk("Could not allocate SLAB cache.\n");
- return -1;
- }
-
return 0;
}
-
/* Allocates memory for per domain private scheduling data*/
static int rr_alloc_task(struct domain *d)
{
- if ( (d->sched_priv = xmem_cache_alloc(dom_info_cache)) == NULL )
+ if ( (d->sched_priv = new(struct rrobin_dom_info) == NULL )
return -1;
memset(d->sched_priv, 0, sizeof(struct rrobin_dom_info));
return 0;
@@ -91,7 +80,7 @@ static void rr_add_task(struct domain *d
static void rr_free_task(struct domain *d)
{
ASSERT(d->sched_priv != NULL);
- xmem_cache_free(dom_info_cache, d->sched_priv);
+ xfree(d->sched_priv);
}
/* Initialises idle task */
--
A bad analogy is like a leaky screwdriver -- Richard Braakman
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