lkml.org 
[lkml]   [2015]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 07/14] genirq: Add a new generic IPI reservation code to irq core
From
Date
On 11/07/2015 01:31 PM, Thomas Gleixner wrote:
> On Tue, 3 Nov 2015, Qais Yousef wrote:
>> +
>> + /* always allocate a virq per cpu */
>> + nr_irqs = ipi_mask_weight(dest);
> That's not really a good assumption. Not all architectures need
> seperate interrupt numbers / descriptors because they can allocate
> from a per cpu interrupt space. We really want to handle that here as
> well. So we need a flag in the IPI domain which tells us whether that
> allocation needs to be weight(desc) or 1.

OK. But is it bad to always allocate the weight? I thought allocating
virqs is cheap, or maybe not?

Thanks,
Qais


\
 
 \ /
  Last update: 2015-11-09 11:21    [W:0.213 / U:1.772 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site