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Re: [Qemu-devel] [PATCH] drive-mirror:fix memory leak
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH] drive-mirror:fix memory leak |
Date: |
Wed, 22 Jan 2014 10:42:58 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Am 22.01.2014 um 08:56 hat Zhang Min geschrieben:
> In the function mirror_iteration() -> qemu_iovec_init(),
> it allocates memory for op->qiov.iov, when the write request calls back,
> but in the function mirror_iteration_done(), it only frees the op,
> not free the op->qiov.iov, so this causes memory leak.
>
> Signed-off-by: Zhang Min <address@hidden>
> ---
> block/mirror.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/block/mirror.c b/block/mirror.c
> index 2932bab..9840840 100644
> --- a/block/mirror.c
> +++ b/block/mirror.c
> @@ -96,6 +96,7 @@ static void mirror_iteration_done(MirrorOp *op, int ret)
> bitmap_set(s->cow_bitmap, chunk_num, nb_chunks);
> }
>
> + g_free(op->qiov.iov);
> g_slice_free(MirrorOp, op);
> qemu_coroutine_enter(s->common.co, NULL);
> }
Please use qemu_iovec_destroy() instead. (I would also move it to right
after the for loop that frees the individual buffers in qiov.)
Kevin