Xen devel - Apr 2013 - Consequence of FLushing TLB with IRQ Enable

Hi,
I wanted to know if its safe to FLUSH TLB with IRQ Enable. Basically If i call
local_flush_tlb_all() with IRQ''s Enabled what is the consequence? How
is it normally done in Linux/Xen.

Warm Regards,
Akshay

On Mon, Apr 8, 2013 at 4:59 PM, akshay st <akshayts@yahoo.co.in>
wrote:
> Hi,
> I wanted to know if its safe to FLUSH TLB with IRQ Enable. Basically If i
call local_flush_tlb_all() with IRQ''s Enabled what is the consequence?
How is it normally done in Linux/Xen.
Did you look through the source code to try to find out what Xen or Linux does?

 -George

Yes. I got the problem. Basically we replace the Duplicate Xen vectors in Linux.
During that stage I was trying to enable IRQ, it will work sometime because of
valid entry in TLB, however after flush system will hang because vectors are no
longer there.


----- Original Message -----
From: George Dunlap <George.Dunlap@eu.citrix.com>
To: akshay st <akshayts@yahoo.co.in>
Cc: "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Sent: Tuesday, 9 April 2013 5:05 PM
Subject: Re: [Xen-devel] Consequence of FLushing TLB with IRQ Enable

On Mon, Apr 8, 2013 at 4:59 PM, akshay st <akshayts@yahoo.co.in>
wrote:
> Hi,
> I wanted to know if its safe to FLUSH TLB with IRQ Enable. Basically If i
call local_flush_tlb_all() with IRQ''s Enabled what is the consequence?
How is it normally done in Linux/Xen.
Did you look through the source code to try to find out what Xen or Linux does?

-George