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| author | Nick Piggin <npiggin@suse.de> | 2009-01-06 14:39:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:59:01 -0800 |
| commit | e97a630eb0f5b8b380fd67504de6cedebb489003 (patch) | |
| tree | 52e337eafeb386b97630e7ffe2697550e589afc3 /mm/vmalloc.c | |
| parent | 848778483351e90f9a2c587bdbe0c78b17c1e30b (diff) | |
| download | lwn-e97a630eb0f5b8b380fd67504de6cedebb489003.tar.gz lwn-e97a630eb0f5b8b380fd67504de6cedebb489003.zip | |
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.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index b62ea569aa43..78689cba178f 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); } /* |