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authorGu Zheng <guz.fnst@cn.fujitsu.com>2014-09-03 17:45:44 +0800
committerBenjamin LaHaise <bcrl@kvack.org>2014-09-04 16:54:47 -0400
commit6098b45b32e6baeacc04790773ced9340601d511 (patch)
treeef7d685783dc69524d1512dd6273fac127c8962b /fs/aio.c
parent2ff396be602f10b5eab8e73b24f20348fa2de159 (diff)
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aio: block exit_aio() until all context requests are completed
It seems that exit_aio() also needs to wait for all iocbs to complete (like io_destroy), but we missed the wait step in current implemention, so fix it in the same way as we did in io_destroy. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Benjamin LaHaise <bcrl@kvack.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/aio.c')
-rw-r--r--fs/aio.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/aio.c b/fs/aio.c
index 5f2e9c6c328e..733750096b71 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -793,6 +793,8 @@ void exit_aio(struct mm_struct *mm)
for (i = 0; i < table->nr; ++i) {
struct kioctx *ctx = table->table[i];
+ struct completion requests_done =
+ COMPLETION_INITIALIZER_ONSTACK(requests_done);
if (!ctx)
continue;
@@ -804,7 +806,10 @@ void exit_aio(struct mm_struct *mm)
* that it needs to unmap the area, just set it to 0.
*/
ctx->mmap_size = 0;
- kill_ioctx(mm, ctx, NULL);
+ kill_ioctx(mm, ctx, &requests_done);
+
+ /* Wait until all IO for the context are done. */
+ wait_for_completion(&requests_done);
}
RCU_INIT_POINTER(mm->ioctx_table, NULL);