On Thu 20-06-19 19:32:15, Minchan Kim wrote:
[...]
> Then, okay, I will add can_do_mincore similar check for the MADV_PAGEOUT
> syscall
> if others have different ideas.
Great that we are on the same page. We can simply skip over those pages.
--
Michal Hocko
SUSE Labs
On Thu, Jun 20, 2019 at 11:22:09AM +0200, Michal Hocko wrote:
> On Thu 20-06-19 17:40:40, Minchan Kim wrote:
> > > > > Pushing out a shared page cache
> > > > > is possible even now but this interface gives a much easier tool to
> > > > > evict shared state and perform all sorts of timing attacks.
On Thu 20-06-19 17:40:40, Minchan Kim wrote:
> > > > Pushing out a shared page cache
> > > > is possible even now but this interface gives a much easier tool to
> > > > evict shared state and perform all sorts of timing attacks. Unless I am
> > > > missing something we should be doing something
On Thu, Jun 20, 2019 at 09:04:44AM +0200, Michal Hocko wrote:
> On Thu 20-06-19 13:16:20, Minchan Kim wrote:
> > On Wed, Jun 19, 2019 at 03:24:50PM +0200, Michal Hocko wrote:
> > > On Mon 10-06-19 20:12:51, Minchan Kim wrote:
> > > [...]
> > > > +static int madvise_pageout_pte_range(pmd_t *pmd,
On Thu 20-06-19 13:16:20, Minchan Kim wrote:
> On Wed, Jun 19, 2019 at 03:24:50PM +0200, Michal Hocko wrote:
> > On Mon 10-06-19 20:12:51, Minchan Kim wrote:
> > [...]
> > > +static int madvise_pageout_pte_range(pmd_t *pmd, unsigned long addr,
> > > + unsigned long end,
On Wed, Jun 19, 2019 at 03:24:50PM +0200, Michal Hocko wrote:
> On Mon 10-06-19 20:12:51, Minchan Kim wrote:
> [...]
> > +static int madvise_pageout_pte_range(pmd_t *pmd, unsigned long addr,
> > + unsigned long end, struct mm_walk *walk)
>
> Again the same question about
On Mon 10-06-19 20:12:51, Minchan Kim wrote:
[...]
> +static int madvise_pageout_pte_range(pmd_t *pmd, unsigned long addr,
> + unsigned long end, struct mm_walk *walk)
Again the same question about a potential code reuse...
[...]
> +regular_page:
> +
When a process expects no accesses to a certain memory range
for a long time, it could hint kernel that the pages can be
reclaimed instantly but data should be preserved for future use.
This could reduce workingset eviction so it ends up increasing
performance.
This patch introduces the new
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