On Tue, Feb 02, 2010 at 10:07:10AM +1100, Benjamin Herrenschmidt wrote:
> On Mon, 2010-02-01 at 22:55 +0100, Christoph Hellwig wrote:
>
> > > +typedef struct {
> > > + unsigned int __softirq_pending;
> > > +} cacheline_aligned irq_cpustat_t;
> >
> > No need to bother with an irq_cpustat_t typ
On Mon, 2010-02-01 at 22:55 +0100, Christoph Hellwig wrote:
> > +typedef struct {
> > + unsigned int __softirq_pending;
> > +} cacheline_aligned irq_cpustat_t;
>
> No need to bother with an irq_cpustat_t type at all in this case, just
> declare a softirq_pending per-cpu variable.
I think h
On Mon, Feb 01, 2010 at 05:30:23PM +1100, Anton Blanchard wrote:
>
> PowerPC is currently using asm-generic/hardirq.h which statically allocates an
> NR_CPUS irq_stat array. Switch to an arch specific implementation which uses
> per cpu data:
>
> On a kernel with NR_CPUS=1024, this saves quite a
PowerPC is currently using asm-generic/hardirq.h which statically allocates an
NR_CPUS irq_stat array. Switch to an arch specific implementation which uses
per cpu data:
On a kernel with NR_CPUS=1024, this saves quite a lot of memory:
textdata bss dec hexfilename
8767
