Commit-ID: b9137f616884386484319f33cd6bec2839486233 Gitweb: http://git.kernel.org/tip/b9137f616884386484319f33cd6bec2839486233 Author: Asias He <asias.hejun@xxxxxxxxx> AuthorDate: Mon, 4 Jun 2012 23:10:04 +0800 Committer: Pekka Enberg <penberg@xxxxxxxxxx> CommitDate: Tue, 12 Jun 2012 12:09:52 +0300 kvm tools: Increase AIO_MAX to 256 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.hejun@xxxxxxxxx> Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx> --- tools/kvm/disk/core.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/tools/kvm/disk/core.c b/tools/kvm/disk/core.c index 2b482c6..2739dcd 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; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|