aio: double aio_max_nr in calculations

With the changes to use percpu counters for aio event ring size calculation,
existing increases to aio_max_nr are now insufficient to allow for the
allocation of enough events.  Double the value used for aio_max_nr to account
for the doubling introduced by the percpu slack.

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/aio.c b/fs/aio.c
index e46b1195191b..945dd0d072f3 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -490,7 +490,7 @@ static struct kioctx *ioctx_alloc(unsigned nr_events)
                 return ERR_PTR(-EINVAL);
         }
 
-        if (!nr_events || (unsigned long)nr_events > aio_max_nr)
+        if (!nr_events || (unsigned long)nr_events > (aio_max_nr * 2UL))
                 return ERR_PTR(-EAGAIN);
 
         ctx = kmem_cache_zalloc(kioctx_cachep, GFP_KERNEL);
@@ -522,7 +522,7 @@ static struct kioctx *ioctx_alloc(unsigned nr_events)
 
         /* limit the number of system wide aios */
         spin_lock(&aio_nr_lock);
-        if (aio_nr + nr_events > aio_max_nr ||
+        if (aio_nr + nr_events > (aio_max_nr * 2UL) ||
             aio_nr + nr_events < aio_nr) {
                 spin_unlock(&aio_nr_lock);
                 goto out_cleanup;