Don't print warning if memory allocation fails. The virtio driver can handle allocation failure (it falls back to direct sglist), so there is no functionality degradation.
This warning was observed when swapping to virtio scsi device because there may be not enough free memory during swapping. Signed-off-by: Mikulas Patocka <[email protected]> --- drivers/virtio/virtio_ring.c | 6 ++++++ 1 file changed, 6 insertions(+) Index: linux-4.7-rc7/drivers/virtio/virtio_ring.c =================================================================== --- linux-4.7-rc7.orig/drivers/virtio/virtio_ring.c 2016-05-09 17:45:04.000000000 +0200 +++ linux-4.7-rc7/drivers/virtio/virtio_ring.c 2016-07-11 17:30:20.000000000 +0200 @@ -237,6 +237,12 @@ static struct vring_desc *alloc_indirect */ gfp &= ~__GFP_HIGHMEM; + /* + * Don't warn if the allocation fails, because the driver + * handles allocation failures gracefully. + */ + gfp |= __GFP_NOWARN; + desc = kmalloc(total_sg * sizeof(struct vring_desc), gfp); if (!desc) return NULL; _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
