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Commit 6098b45b authored by Gu Zheng's avatar Gu Zheng Committed by Benjamin LaHaise
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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: default avatarGu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: default avatarBenjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org
parent 2ff396be

fs/aio.c

+6 −1
Original line number Diff line number Diff line
@@ -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);