Linus Torvalds writes:
> On Tue, Jan 12, 2021 at 9:24 PM huang ying
> wrote:
>> >
>> > Couldn't we just move it to the tail of the LRU list so it's reclaimed
>> > first? Or is locking going to be a problem here?
>>
>> Yes. That's a way to reduce the disturbance to the page reclaiming.
>> For
On Tue, Jan 12, 2021 at 9:24 PM huang ying wrote:
> >
> > Couldn't we just move it to the tail of the LRU list so it's reclaimed
> > first? Or is locking going to be a problem here?
>
> Yes. That's a way to reduce the disturbance to the page reclaiming.
> For LRU lock contention, is it
On Wed, Jan 13, 2021 at 11:12 AM Matthew Wilcox wrote:
>
> On Wed, Jan 13, 2021 at 11:08:56AM +0800, huang ying wrote:
> > On Wed, Jan 13, 2021 at 10:47 AM Linus Torvalds
> > wrote:
> > >
> > > On Tue, Jan 12, 2021 at 6:43 PM Huang Ying wrote:
> > > >
> > > > So in this patch, at the end of
On Wed, Jan 13, 2021 at 11:08:56AM +0800, huang ying wrote:
> On Wed, Jan 13, 2021 at 10:47 AM Linus Torvalds
> wrote:
> >
> > On Tue, Jan 12, 2021 at 6:43 PM Huang Ying wrote:
> > >
> > > So in this patch, at the end of wp_page_copy(), the old unused swap
> > > cache page will be tried to be
On Wed, Jan 13, 2021 at 10:47 AM Linus Torvalds
wrote:
>
> On Tue, Jan 12, 2021 at 6:43 PM Huang Ying wrote:
> >
> > So in this patch, at the end of wp_page_copy(), the old unused swap
> > cache page will be tried to be freed.
>
> I'd much rather free it later when needed, rather than when
On Tue, Jan 12, 2021 at 6:43 PM Huang Ying wrote:
>
> So in this patch, at the end of wp_page_copy(), the old unused swap
> cache page will be tried to be freed.
I'd much rather free it later when needed, rather than when you're in
a COW section.
Linus
Commit 09854ba94c6a ("mm: do_wp_page() simplification") introduces an
issue as follows.
On a system with free memory as follow before test,
totalusedfree shared buff/cache available
Mem:1697300 160156 14592208648 77924
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