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authorNick Piggin <npiggin@suse.de>2009-01-06 14:39:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 15:59:01 -0800
commite97a630eb0f5b8b380fd67504de6cedebb489003 (patch)
tree52e337eafeb386b97630e7ffe2697550e589afc3 /mm/vmalloc.c
parent848778483351e90f9a2c587bdbe0c78b17c1e30b (diff)
downloadlinux-linaro-android-e97a630eb0f5b8b380fd67504de6cedebb489003.tar.gz
mm: vmalloc use mutex for purge
The vmalloc purge lock can be a mutex so we can sleep while a purge is going on (purge involves a global kernel TLB invalidate, so it can take quite a while). Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index b62ea569aa4..78689cba178 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -14,6 +14,7 @@
#include <linux/highmem.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
+#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
@@ -473,7 +474,7 @@ static atomic_t vmap_lazy_nr = ATOMIC_INIT(0);
static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
int sync, int force_flush)
{
- static DEFINE_SPINLOCK(purge_lock);
+ static DEFINE_MUTEX(purge_lock);
LIST_HEAD(valist);
struct vmap_area *va;
int nr = 0;
@@ -484,10 +485,10 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
* the case that isn't actually used at the moment anyway.
*/
if (!sync && !force_flush) {
- if (!spin_trylock(&purge_lock))
+ if (!mutex_trylock(&purge_lock))
return;
} else
- spin_lock(&purge_lock);
+ mutex_lock(&purge_lock);
rcu_read_lock();
list_for_each_entry_rcu(va, &vmap_area_list, list) {
@@ -519,7 +520,7 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
__free_vmap_area(va);
spin_unlock(&vmap_area_lock);
}
- spin_unlock(&purge_lock);
+ mutex_unlock(&purge_lock);
}
/*