3.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gu Zheng <guz.fnst@xxxxxxxxxxxxxx>
commit 6098b45b32e6baeacc04790773ced9340601d511 upstream.
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@xxxxxxxxxxxxxx>
Signed-off-by: Benjamin LaHaise <bcrl@xxxxxxxxx>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
fs/aio.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -797,6 +797,9 @@ void exit_aio(struct mm_struct *mm)
unsigned i = 0;
while (1) {
+ struct completion requests_done =
+ COMPLETION_INITIALIZER_ONSTACK(requests_done);
+
rcu_read_lock();
table = rcu_dereference(mm->ioctx_table);
@@ -824,7 +827,10 @@ void exit_aio(struct mm_struct *mm)
*/
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);
}
}
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