linux/Documentation/lguest
Rusty Russell 42b36cc0ce virtio: Force use of power-of-two for descriptor ring sizes
The virtio descriptor rings of size N-1 were nicely set up to be
aligned to an N-byte boundary.  But as Anthony Liguori points out, the
free-running indices used by virtio require that the sizes be a power
of 2, otherwise we get problems on wrap (demonstrated with lguest).

So we replace the clever "2^n-1" scheme with a simple "align to page
boundary" scheme: this means that all virtio rings take at least two
pages, but it's safer than guessing cache alignment.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-11-12 13:59:40 +11:00
..
extract lguest: documentation I: Preparation 2007-07-26 11:35:16 -07:00
lguest.c virtio: Force use of power-of-two for descriptor ring sizes 2007-11-12 13:59:40 +11:00
lguest.txt Update lguest documentation to reflect the new virtual block device name. 2007-10-23 15:49:57 +10:00
Makefile Introduce guest mem offset, static link example launcher 2007-10-23 15:49:50 +10:00