On Tue 05-01-21 10:29:45, David Hildenbrand wrote:
> On 05.01.21 10:20, Michal Hocko wrote:
[...]
> > A global knob with all or nothing sounds like an easier to use and
> > maintain solution to me.
>
> I mean, that brings me back to my original suggestion: just use
> hugetlbfs and implement some
On Tue, Jan 5, 2021 at 5:30 PM David Hildenbrand wrote:
>
> On 05.01.21 10:20, Michal Hocko wrote:
> > On Mon 04-01-21 15:00:31, Dave Hansen wrote:
> >> On 1/4/21 12:11 PM, David Hildenbrand wrote:
> Yeah, it certainly can't be the default, but it *is* useful for
> thing where we know
On 05.01.21 10:20, Michal Hocko wrote:
> On Mon 04-01-21 15:00:31, Dave Hansen wrote:
>> On 1/4/21 12:11 PM, David Hildenbrand wrote:
Yeah, it certainly can't be the default, but it *is* useful for
thing where we know that there are no cache benefits to zeroing
close to where the
On Mon 04-01-21 15:00:31, Dave Hansen wrote:
> On 1/4/21 12:11 PM, David Hildenbrand wrote:
> >> Yeah, it certainly can't be the default, but it *is* useful for
> >> thing where we know that there are no cache benefits to zeroing
> >> close to where the memory is allocated.
> >>
> >> The trick is
On Mon, Jan 4, 2021 at 12:11 PM David Hildenbrand wrote:
>
>
> > Am 04.01.2021 um 20:52 schrieb Dave Hansen :
> >
> > On 1/4/21 11:27 AM, Matthew Wilcox wrote:
> >>> On Mon, Jan 04, 2021 at 11:19:13AM -0800, Dave Hansen wrote:
> >>> On 12/21/20 8:30 AM, Liang Li wrote:
> ---
On 1/4/21 12:11 PM, David Hildenbrand wrote:
>> Yeah, it certainly can't be the default, but it *is* useful for
>> thing where we know that there are no cache benefits to zeroing
>> close to where the memory is allocated.
>>
>> The trick is opting into it somehow, either in a process or a VMA.
>>
> Am 04.01.2021 um 20:52 schrieb Dave Hansen :
>
> On 1/4/21 11:27 AM, Matthew Wilcox wrote:
>>> On Mon, Jan 04, 2021 at 11:19:13AM -0800, Dave Hansen wrote:
>>> On 12/21/20 8:30 AM, Liang Li wrote:
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -137,6
On 1/4/21 11:27 AM, Matthew Wilcox wrote:
> On Mon, Jan 04, 2021 at 11:19:13AM -0800, Dave Hansen wrote:
>> On 12/21/20 8:30 AM, Liang Li wrote:
>>> --- a/include/linux/page-flags.h
>>> +++ b/include/linux/page-flags.h
>>> @@ -137,6 +137,9 @@ enum pageflags {
>>> #endif
>>> #ifdef CONFIG_64BIT
On Mon, Jan 4, 2021 at 11:28 AM Matthew Wilcox wrote:
>
> On Mon, Jan 04, 2021 at 11:19:13AM -0800, Dave Hansen wrote:
> > On 12/21/20 8:30 AM, Liang Li wrote:
> > > --- a/include/linux/page-flags.h
> > > +++ b/include/linux/page-flags.h
> > > @@ -137,6 +137,9 @@ enum pageflags {
> > > #endif
>
On Mon, Jan 04, 2021 at 11:19:13AM -0800, Dave Hansen wrote:
> On 12/21/20 8:30 AM, Liang Li wrote:
> > --- a/include/linux/page-flags.h
> > +++ b/include/linux/page-flags.h
> > @@ -137,6 +137,9 @@ enum pageflags {
> > #endif
> > #ifdef CONFIG_64BIT
> > PG_arch_2,
> > +#endif
> > +#ifdef
On 12/21/20 8:30 AM, Liang Li wrote:
> --- a/include/linux/page-flags.h
> +++ b/include/linux/page-flags.h
> @@ -137,6 +137,9 @@ enum pageflags {
> #endif
> #ifdef CONFIG_64BIT
> PG_arch_2,
> +#endif
> +#ifdef CONFIG_PREZERO_PAGE
> + PG_zero,
> #endif
> __NR_PAGEFLAGS,
I don't
Zero out the page content usually happens when allocating pages with
the flag of __GFP_ZERO, this is a time consuming operation, it makes
the population of a large vma area very slowly. This patch introduce
a new feature for zero out pages before page allocation, it can help
to speed up page
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