- Background
The VM Generation ID is a feature defined by Microsoft (paper:
http://go.microsoft.com/fwlink/?LinkId=260709) and supported by
multiple hypervisor vendors.
The feature can be used to drive the `sysgenid` mechanism required in
virtualized environments by software that works with local
- Background and problem
The System Generation ID feature is required in virtualized or
containerized environments by applications that work with local copies
or caches of world-unique data such as random values, uuids,
monotonically increasing counters, etc.
Such applications can be negatively af
This feature is aimed at virtualized or containerized environments
where VM or container snapshotting duplicates memory state, which is a
challenge for applications that want to generate unique data such as
request IDs, UUIDs, and cryptographic nonces.
The patch set introduces a mechanism that pro
On 12/01/2021, 15:09, "Michael S. Tsirkin" wrote:
On Tue, Jan 12, 2021 at 02:15:59PM +0200, Adrian Catangiu wrote:
> +3) Mapped memory polling simplified example::
> +
> + /*
> + * app/library function that provides cached secrets
> + */
> + char
On 12/01/2021, 14:49, "Michael S. Tsirkin" wrote:
On Tue, Jan 12, 2021 at 02:15:58PM +0200, Adrian Catangiu wrote:
> The first patch in the set implements a device driver which exposes a
> read-only device /dev/sysgenid to userspace, which contains a
> monotonically increasing u32
On 12/01/2021, 15:07, "Greg KH" wrote:
On Tue, Jan 12, 2021 at 02:15:59PM +0200, Adrian Catangiu wrote:
> + Partial reads are not allowed - read buffer needs to be at least
> + ``sizeof(unsigned)`` in size.
"sizeof(unsigned)"? How about being specific and making this a real "X
