An initial vmalloc failure should start off a synchronous flush of lazy
areas, in case someone is in progress flushing them already, which could
cause us to return an allocation failure even if there is plenty of KVA
free.
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>
spin_unlock(&purge_lock);
}
spin_unlock(&purge_lock);
}
+/*
+ * Kick off a purge of the outstanding lazy areas. Don't bother if somebody
+ * is already purging.
+ */
+static void try_purge_vmap_area_lazy(void)
+{
+ unsigned long start = ULONG_MAX, end = 0;
+
+ __purge_vmap_area_lazy(&start, &end, 0, 0);
+}
+
/*
* Kick off a purge of the outstanding lazy areas.
*/
/*
* Kick off a purge of the outstanding lazy areas.
*/
{
unsigned long start = ULONG_MAX, end = 0;
{
unsigned long start = ULONG_MAX, end = 0;
- __purge_vmap_area_lazy(&start, &end, 0, 0);
+ __purge_vmap_area_lazy(&start, &end, 1, 0);
va->flags |= VM_LAZY_FREE;
atomic_add((va->va_end - va->va_start) >> PAGE_SHIFT, &vmap_lazy_nr);
if (unlikely(atomic_read(&vmap_lazy_nr) > lazy_max_pages()))
va->flags |= VM_LAZY_FREE;
atomic_add((va->va_end - va->va_start) >> PAGE_SHIFT, &vmap_lazy_nr);
if (unlikely(atomic_read(&vmap_lazy_nr) > lazy_max_pages()))
- purge_vmap_area_lazy();
+ try_purge_vmap_area_lazy();
}
static struct vmap_area *find_vmap_area(unsigned long addr)
}
static struct vmap_area *find_vmap_area(unsigned long addr)