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Re: [Xen-devel] Consequence of FLushing TLB with IRQ Enable

  • To: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
  • From: akshay st <akshayts@xxxxxxxxxxx>
  • Date: Wed, 10 Apr 2013 00:58:31 +0800 (SGT)
  • Cc: "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
  • Delivery-date: Tue, 09 Apr 2013 16:58:57 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

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@xxxxxxxxxxxxx>
To: akshay st <akshayts@xxxxxxxxxxx>
Cc: "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
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@xxxxxxxxxxx> 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?


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