On Mon, Apr 12, 2021 at 9:02 PM Huang, Ying wrote:
>
> Yu Zhao writes:
>
> > On Tue, Mar 16, 2021 at 02:14:43PM -0700, Dave Hansen wrote:
> >> On 3/16/21 1:30 PM, Yu Zhao wrote:
> >> > On Tue, Mar 16, 2021 at 07:50:23AM -0700, Dave Hansen wrote:
> >> >> I think it would also be very worthwhile to
Yu Zhao writes:
> On Tue, Mar 16, 2021 at 02:14:43PM -0700, Dave Hansen wrote:
>> On 3/16/21 1:30 PM, Yu Zhao wrote:
>> > On Tue, Mar 16, 2021 at 07:50:23AM -0700, Dave Hansen wrote:
>> >> I think it would also be very worthwhile to include some research in
>> >> this series about why the kernel
On Tue, Mar 16, 2021 at 02:14:43PM -0700, Dave Hansen wrote:
> On 3/16/21 1:30 PM, Yu Zhao wrote:
> > On Tue, Mar 16, 2021 at 07:50:23AM -0700, Dave Hansen wrote:
> >> I think it would also be very worthwhile to include some research in
> >> this series about why the kernel moved away from page tab
On 3/16/21 1:30 PM, Yu Zhao wrote:
> On Tue, Mar 16, 2021 at 07:50:23AM -0700, Dave Hansen wrote:
>> I think it would also be very worthwhile to include some research in
>> this series about why the kernel moved away from page table scanning.
>> What has changed? Are the workloads we were concerne
On Tue, Mar 16, 2021 at 07:50:23AM -0700, Dave Hansen wrote:
> On 3/15/21 7:24 PM, Yu Zhao wrote:
> > On Mon, Mar 15, 2021 at 11:00:06AM -0700, Dave Hansen wrote:
> >> How bad does this scanning get in the worst case if there's a lot of
> >> sharing?
> >
> > Actually the improvement is larger when
On 3/15/21 7:24 PM, Yu Zhao wrote:
> On Mon, Mar 15, 2021 at 11:00:06AM -0700, Dave Hansen wrote:
>> How bad does this scanning get in the worst case if there's a lot of
>> sharing?
>
> Actually the improvement is larger when there is more sharing, i.e.,
> higher map_count larger improvement. Let'
On Mon, Mar 15, 2021 at 11:38:20AM -0700, Yang Shi wrote:
> On Fri, Mar 12, 2021 at 11:57 PM Yu Zhao wrote:
> >
> > TLDR
> >
> > The current page reclaim is too expensive in terms of CPU usage and
> > often making poor choices about what to evict. We would like to offer
> > a performant, vers
On Mon, Mar 15, 2021 at 11:00:06AM -0700, Dave Hansen wrote:
> On 3/12/21 11:57 PM, Yu Zhao wrote:
> > Background
> > ==
> > DRAM is a major factor in total cost of ownership, and improving
> > memory overcommit brings a high return on investment. Over the past
> > decade of research and ex
On Fri, Mar 12, 2021 at 11:57 PM Yu Zhao wrote:
>
> TLDR
>
> The current page reclaim is too expensive in terms of CPU usage and
> often making poor choices about what to evict. We would like to offer
> a performant, versatile and straightforward augment.
>
> Repo
>
> git fetch https://l
On 3/12/21 11:57 PM, Yu Zhao wrote:
> Background
> ==
> DRAM is a major factor in total cost of ownership, and improving
> memory overcommit brings a high return on investment. Over the past
> decade of research and experimentation in memory overcommit, we
> observed a distinct trend across
On Mon, Mar 15, 2021 at 09:13:50AM +0800, Hillf Danton wrote:
> On Sat, 13 Mar 2021 00:57:33 -0700 Yu Zhao wrote:
> > TLDR
> >
> > The current page reclaim is too expensive in terms of CPU usage and
> > often making poor choices about what to evict. We would like to offer
> > a performant, ver
On Sun, Mar 14, 2021 at 06:48:17PM -0400, Zi Yan wrote:
> On 13 Mar 2021, at 2:57, Yu Zhao wrote:
> > Problems
> >
> > 31.03% page_vma_mapped_walk
> > 25.59% lzo1x_1_do_compress
> >4.63% do_raw_spin_lock
> >3.89% vma_interval_tree_iter_next
> >3.33% vma_interval_tree
On 13 Mar 2021, at 2:57, Yu Zhao wrote:
> TLDR
>
> The current page reclaim is too expensive in terms of CPU usage and
> often making poor choices about what to evict. We would like to offer
> a performant, versatile and straightforward augment.
>
> Repo
>
> git fetch https://linux-mm.go
TLDR
The current page reclaim is too expensive in terms of CPU usage and
often making poor choices about what to evict. We would like to offer
a performant, versatile and straightforward augment.
Repo
git fetch https://linux-mm.googlesource.com/page-reclaim refs/changes/01/1101/1
Gerrit
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