> From: David Miller [mailto:davem@xxxxxxxxxxxxx] > Sent: Saturday, May 7, 2016 1:04 > To: Dexuan Cui <decui@xxxxxxxxxxxxx> > Cc: gregkh@xxxxxxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; devel@xxxxxxxxxxxxxxxxxxxxxx; olaf@xxxxxxxxx; > apw@xxxxxxxxxxxxx; jasowang@xxxxxxxxxx; cavery@xxxxxxxxxx; KY > Srinivasan <kys@xxxxxxxxxxxxx>; Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>; > joe@xxxxxxxxxxx; vkuznets@xxxxxxxxxx > Subject: Re: [PATCH v9 net-next 1/2] hv_sock: introduce Hyper-V Sockets > > From: Dexuan Cui <decui@xxxxxxxxxxxxx> > Date: Wed, 4 May 2016 09:56:57 -0700 > > > +#define VMBUS_RINGBUFFER_SIZE_HVSOCK_RECV (5 * PAGE_SIZE) > > +#define VMBUS_RINGBUFFER_SIZE_HVSOCK_SEND (5 * PAGE_SIZE) > > + > > +#define HVSOCK_RCV_BUF_SZ > VMBUS_RINGBUFFER_SIZE_HVSOCK_RECV > ... > > +struct hvsock_sock { > ... > > + /* The 'hdr' and 'buf' in the below 'send' and 'recv' definitions must > > + * be consecutive: see hvsock_send_data() and hvsock_recv_data(). > > + */ > > + struct { > > + struct vmpipe_proto_header hdr; > > + u8 buf[HVSOCK_SND_BUF_SZ]; > > + } send; > > + > > + struct { > > + struct vmpipe_proto_header hdr; > > + u8 buf[HVSOCK_RCV_BUF_SZ]; > > + > > + unsigned int data_len; > > + unsigned int data_offset; > > + } recv; > > I don't think allocating 5 pages of unswappable memory for every Hyper-V > socket > created is reasonable. Thanks for the comment, David! I should be able to make 'send', 'recv' here to pointers and use vmalloc() to allocate the memory for them. I will do this. Thanks, -- Dexuan _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
