On Tue, Aug 25, 2020 at 8:04 PM Alexander Graf wrote:
>
> Hi Andy,
>
> On 26.08.20 01:41, Andy Lutomirski wrote:
> >
> > On Tue, Aug 25, 2020 at 4:18 PM Alexander Graf wrote:
> >>
> >> Hi Thomas,
> >>
> >> On 25.08.20 12:28, Thomas Gleixner wrote:
> >>> void irq_complete_move(struct irq_cfg
On Tue, Aug 25 2020 at 16:41, Andy Lutomirski wrote:
> How about this:
>
> void irq_complete_move(struct irq_cfg *cfg)
> {
> __irq_complete_move(cfg, ~get_irq_regs()->orig_ax);
> }
>
> in arch/x86/kernel/apic/vector.c.
Duh
Hi Andy,
On 26.08.20 01:41, Andy Lutomirski wrote:
On Tue, Aug 25, 2020 at 4:18 PM Alexander Graf wrote:
Hi Thomas,
On 25.08.20 12:28, Thomas Gleixner wrote:
void irq_complete_move(struct irq_cfg *cfg)
{
__irq_complete_move(cfg, ~get_irq_regs()->orig_ax);
}
Alex,
On Mon, Aug
On Tue, Aug 25, 2020 at 4:18 PM Alexander Graf wrote:
>
> Hi Thomas,
>
> On 25.08.20 12:28, Thomas Gleixner wrote:
> >void irq_complete_move(struct irq_cfg *cfg)
{
__irq_complete_move(cfg, ~get_irq_regs()->orig_ax);
}
> > Alex,
> >
> > On Mon, Aug 24 2020 at 19:29, Alexander Graf wrote:
Hi Thomas,
On 25.08.20 12:28, Thomas Gleixner wrote:
Alex,
On Mon, Aug 24 2020 at 19:29, Alexander Graf wrote:
I'm currently trying to understand a performance regression with
ScyllaDB on i3en.3xlarge (KVM based VM on Skylake) which we reliably
bisected down to this commit:
Alex,
On Mon, Aug 24 2020 at 19:29, Alexander Graf wrote:
> I'm currently trying to understand a performance regression with
> ScyllaDB on i3en.3xlarge (KVM based VM on Skylake) which we reliably
> bisected down to this commit:
>
>https://github.com/scylladb/scylla/issues/7036
>
> What
Hi Thomas,
On 21.05.20 22:05, Thomas Gleixner wrote:
From: Thomas Gleixner
Device interrupts which go through do_IRQ() or the spurious interrupt
handler have their separate entry code on 64 bit for no good reason.
Both 32 and 64 bit transport the vector number through ORIG_[RE]AX in
pt_regs.
Thomas Gleixner writes:
> + .align 8
> +SYM_CODE_START(irq_entries_start)
> +vector=FIRST_EXTERNAL_VECTOR
> +pos = .
> +.rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR)
> + UNWIND_HINT_IRET_REGS
> + .byte 0x6a, vector
> + jmp common_interrupt
> + .nops
From: Thomas Gleixner
Device interrupts which go through do_IRQ() or the spurious interrupt
handler have their separate entry code on 64 bit for no good reason.
Both 32 and 64 bit transport the vector number through ORIG_[RE]AX in
pt_regs. Further the vector number is forced to fit into an u8
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