On Fri, Mar 08, 2013 at 02:43:57PM -0500, Konrad Rzeszutek Wilk wrote: > On Fri, Feb 08, 2013 at 11:28:12AM -0800, Yinghai Lu wrote: > > We will pre-reserve irq for all gsi at first for x86, so we have to > > use realloc with it. > > Where are the GSI's pre-allocated?
And the answer is in arch_probe_nr_irqs and determined by nr_irqs_gsi. That data then feeds in early_irq_init which sets the bitmap. Could you add that please in the git commit if it is not too much trouble? > > > > > Signed-off-by: Yinghai Lu <[email protected]> > > Cc: Konrad Rzeszutek Wilk <[email protected]> > > Cc: [email protected] > > --- > > drivers/xen/events.c | 8 ++++++-- > > 1 file changed, 6 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/xen/events.c b/drivers/xen/events.c > > index 0be4df3..dda38db 100644 > > --- a/drivers/xen/events.c > > +++ b/drivers/xen/events.c > > @@ -482,8 +482,12 @@ static int __must_check xen_allocate_irq_gsi(unsigned > > gsi) > > /* Legacy IRQ descriptors are already allocated by the arch. */ > > if (gsi < NR_IRQS_LEGACY) > > irq = gsi; > > - else > > - irq = irq_alloc_desc_at(gsi, -1); > > + else { > > + /* for x86, irq already get reserved for gsi */ > > + irq = irq_realloc_desc_at(gsi, -1); > > + if (irq < 0) > > + irq = irq_alloc_desc_at(gsi, -1); > > + } > > > > xen_irq_init(irq); > > > > -- > > 1.7.10.4 > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
