On 10/10/2017 23:23, Andrew Morton wrote:
> On Mon, 9 Oct 2017 12:07:51 +0200 Laurent Dufour
> wrote:
>
>> +/*
>> + * Advertise that we call the Speculative Page Fault handler.
>> + */
>> +#if defined(CONFIG_X86_64) && defined(CONFIG_SMP)
>> +#define __HAVE_ARCH_CALL_SPF
>> +#endif
>
> Here's
On Mon, 9 Oct 2017 12:07:51 +0200 Laurent Dufour
wrote:
> +/*
> + * Advertise that we call the Speculative Page Fault handler.
> + */
> +#if defined(CONFIG_X86_64) && defined(CONFIG_SMP)
> +#define __HAVE_ARCH_CALL_SPF
> +#endif
Here's where I mess up your life ;)
It would be more idiomatic t
From: Peter Zijlstra
Try a speculative fault before acquiring mmap_sem, if it returns with
VM_FAULT_RETRY continue with the mmap_sem acquisition and do the
traditional fault.
Signed-off-by: Peter Zijlstra (Intel)
[Clearing of FAULT_FLAG_ALLOW_RETRY is now done in
handle_speculative_fault()]
[
