Re: [Xen-devel] [PATCH] x86/monitor: add support for descriptor access events

[Vlad-Ioan TOPAN <itopan@xxxxxxxxxxxxxxx>]

On Tue, 21 Mar 2017 12:04:02 +0000
Andrew Cooper <andrew.cooper3@xxxxxxxxxx> wrote:

> On 10/03/17 15:50, Vlad Ioan Topan wrote:
> > Adds monitor support for descriptor access events (reads & writes of
> > IDTR/GDTR/LDTR/TR) for the x86 architecture (VMX and SVM).
> >
> > Signed-off-by: Vlad Ioan Topan <itopan@xxxxxxxxxxxxxxx>
> 
> How much extra overhead does this typically give?  (I am curious, more
> than anything else)

Without a monitor attached, none at all; with a monitor attached and
with exits activated, there are probably a few hundred exits during
the OS startup process; during normal OS runtime there should be no
descriptor register access.

The other suggestions will be incorporated by my colleagues who will
take over the patch(es).

Thank you,
--
Vlad-Ioan TOPAN
Linux Kernel Development Lead
Bitdefender

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel