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authorTejun Heo <tj@kernel.org>2009-03-01 16:06:56 +0900
committerTejun Heo <tj@kernel.org>2009-03-01 16:06:56 +0900
commitd0c4f570276cb4d2dc4215b90eb7cb6e2bdd4a15 (patch)
tree5cf4f85082ed720df7d815299782e25e44d75c9d /mm/bootmem.c
parentaf6326d72c95d6e0bbc88c92185c654f57acef3b (diff)
downloadlinux-d0c4f570276cb4d2dc4215b90eb7cb6e2bdd4a15.tar.gz
bootmem, x86: further fixes for arch-specific bootmem wrapping
Impact: fix new breakages introduced by previous fix Commit c132937556f56ee4b831ef4b23f1846e05fde102 tried to clean up bootmem arch wrapper but it wasn't quite correct. Before the commit, the followings were broken. * Low level interface functions prefixed with __ ignored arch preference. * reserve_bootmem(...) can't be mapped into reserve_bootmem_node(NODE_DATA(0)->bdata, ...) because the node is not preference here. The region specified MUST fall into the specified region; otherwise, it will panic. After the commit, * If allocation fails for the arch preferred node, it should fallback to whatever is available. Instead, it simply failed allocation. There are too many internal details to allow generic wrapping and still keep things simple for archs. Plus, all that arch wants is a way to prefer certain node over another. This patch drops the generic wrapping around alloc_bootmem_core() and add alloc_bootmem_core() instead. If necessary, arch can define bootmem_arch_referred_node() macro or function which takes all allocation information and returns the preferred node. bootmem generic code will always try the preferred node first and then fallback to other nodes as usual. Breakages noted and changes reviewed by Johannes Weiner. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Diffstat (limited to 'mm/bootmem.c')
-rw-r--r--mm/bootmem.c45
1 files changed, 30 insertions, 15 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index d7140c008ba..daf92713f7d 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -37,16 +37,6 @@ static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list);
static int bootmem_debug;
-/*
- * If an arch needs to apply workarounds to bootmem allocation, it can
- * set CONFIG_HAVE_ARCH_BOOTMEM and define a wrapper around
- * __alloc_bootmem_core().
- */
-#ifndef CONFIG_HAVE_ARCH_BOOTMEM
-#define alloc_bootmem_core(bdata, size, align, goal, limit) \
- __alloc_bootmem_core((bdata), (size), (align), (goal), (limit))
-#endif
-
static int __init bootmem_debug_setup(char *buf)
{
bootmem_debug = 1;
@@ -436,9 +426,9 @@ static unsigned long align_off(struct bootmem_data *bdata, unsigned long off,
return ALIGN(base + off, align) - base;
}
-static void * __init __alloc_bootmem_core(struct bootmem_data *bdata,
- unsigned long size, unsigned long align,
- unsigned long goal, unsigned long limit)
+static void * __init alloc_bootmem_core(struct bootmem_data *bdata,
+ unsigned long size, unsigned long align,
+ unsigned long goal, unsigned long limit)
{
unsigned long fallback = 0;
unsigned long min, max, start, sidx, midx, step;
@@ -538,17 +528,34 @@ find_block:
return NULL;
}
+static void * __init alloc_arch_preferred_bootmem(bootmem_data_t *bdata,
+ unsigned long size, unsigned long align,
+ unsigned long goal, unsigned long limit)
+{
+#ifdef CONFIG_HAVE_ARCH_BOOTMEM
+ bootmem_data_t *p_bdata;
+
+ p_bdata = bootmem_arch_preferred_node(bdata, size, align, goal, limit);
+ if (p_bdata)
+ return alloc_bootmem_core(p_bdata, size, align, goal, limit);
+#endif
+ return NULL;
+}
+
static void * __init ___alloc_bootmem_nopanic(unsigned long size,
unsigned long align,
unsigned long goal,
unsigned long limit)
{
bootmem_data_t *bdata;
+ void *region;
restart:
- list_for_each_entry(bdata, &bdata_list, list) {
- void *region;
+ region = alloc_arch_preferred_bootmem(NULL, size, align, goal, limit);
+ if (region)
+ return region;
+ list_for_each_entry(bdata, &bdata_list, list) {
if (goal && bdata->node_low_pfn <= PFN_DOWN(goal))
continue;
if (limit && bdata->node_min_pfn >= PFN_DOWN(limit))
@@ -626,6 +633,10 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
{
void *ptr;
+ ptr = alloc_arch_preferred_bootmem(bdata, size, align, goal, limit);
+ if (ptr)
+ return ptr;
+
ptr = alloc_bootmem_core(bdata, size, align, goal, limit);
if (ptr)
return ptr;
@@ -682,6 +693,10 @@ void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
{
void *ptr;
+ ptr = alloc_arch_preferred_bootmem(pgdat->bdata, size, align, goal, 0);
+ if (ptr)
+ return ptr;
+
ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
if (ptr)
return ptr;