The queue size for virtio_blk is 256 and AIO_MAX is 32, we might be short of available aio events if guest issues > 32 requests simultaneously. Following error is observed when guest running stressed I/O workload.
Info: disk_image__read error: total=-11 To fix this, let's increase the aio events limit. Signed-off-by: Asias He <asias.he...@gmail.com> --- tools/kvm/disk/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/kvm/disk/core.c b/tools/kvm/disk/core.c index ed338e7..d1d2d59 100644 --- a/tools/kvm/disk/core.c +++ b/tools/kvm/disk/core.c @@ -6,7 +6,7 @@ #include <sys/eventfd.h> #include <sys/poll.h> -#define AIO_MAX 32 +#define AIO_MAX 256 int debug_iodelay; -- 1.7.10.2 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
