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Re: [Qemu-devel] [PATCH] migrate: Migration aborts abruptly for machine
From: |
Greg Kurz |
Subject: |
Re: [Qemu-devel] [PATCH] migrate: Migration aborts abruptly for machine "none" |
Date: |
Sat, 28 Jan 2017 19:41:57 +0100 |
On Thu, 26 Jan 2017 14:46:52 +0530
Ashijeet Acharya <address@hidden> wrote:
> Migration of a "none" machine with no RAM crashes abruptly as
> bitmap_new() fails and thus aborts. Instead, place a check for
> last_ram_offset() being '0' at the start of ram_save_setup() and
> error out with a meaningful error message.
>
> Signed-off-by: Ashijeet Acharya <address@hidden>
> ---
Maybe a naive question: why a "none" machine with zero RAM should fail to
migrate ?
> migration/ram.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/migration/ram.c b/migration/ram.c
> index ef8fadf..bf05d69 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -1947,6 +1947,11 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
> {
> RAMBlock *block;
>
> + if (last_ram_offset() == 0) {
> + error_report("Failed to migrate: No RAM available!");
> + return -1;
> + }
> +
> /* migration has already setup the bitmap, reuse it. */
> if (!migration_in_colo_state()) {
> if (ram_save_init_globals() < 0) {