lkml.org 
[lkml]   [2012]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRE: [PATCH] fix x2apic defect that Linux kernel doesn't mask 8259A interrupt during the time window between changing VT-d table base address and initializing these VT-d entries(smpboot.c and apic.c )
From
Date
On Wed, 2012-10-10 at 16:02 -0700, Zhang, Lin-Bao (Linux Kernel R&D)
wrote:
> > As I mentioned earlier, the current design already ensures that all the IO-APIC
> > RTE's are masked between the time we enable interrupt-remapping to the time
> > when the IO-APIC RTE's are configured correctly.
> >
> > So I looked at why you are seeing the problem with v2.6.32 but not with the
> > recent kernels. And I think I found out the reason.
>
> I want to know what masking IO-APIC means?

As the platform is configured to use virtual-wire B and the
corresponding IO-APIC RTE is masked, that interrupt will be dropped.

thanks,
suresh



\
 
 \ /
  Last update: 2012-10-11 02:41    [W:0.112 / U:0.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site