From e97a630eb0f5b8b380fd67504de6cedebb489003 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Tue, 6 Jan 2009 14:39:19 -0800 Subject: [PATCH] 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmalloc.c | 9 +++++---- 1 file 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 #include #include +#include #include #include #include @@ -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); } /* -- 2.20.1