From: Jason Wang <[email protected]> Date: Wed, 13 Nov 2013 14:00:40 +0800
> We currently use hdr_len as a hint of head length which is advertised by > guest. But when guest advertise a very big value, it can lead to an 64K+ > allocating of kmalloc() which has a very high possibility of failure when host > memory is fragmented or under heavy stress. The huge hdr_len also reduce the > effect of zerocopy or even disable if a gso skb is linearized in guest. > > To solves those issues, this patch introduces an upper limit (PAGE_SIZE) of > the > head, which guarantees an order 0 allocation each time. > > Cc: Stefan Hajnoczi <[email protected]> > Cc: Michael S. Tsirkin <[email protected]> > Signed-off-by: Jason Wang <[email protected]> Applied and queued up for -stable. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
