On Wed, Jul 29, 2015 at 8:31 AM, Vladimir Davydov <vdavydov@xxxxxxxxxxxxx> wrote:
Ah, yes.
When I tried that I was still scanning memory by address at the end just to compute such totals - but I did not have to do rmap at that point anymore.
It did look incredibly lame, though.
On Wed, Jul 29, 2015 at 08:08:22AM -0700, Michel Lespinasse wrote:
> On Wed, Jul 29, 2015 at 7:45 AM, Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
> wrote:
> > Page table scan approach has the inherent problem - it ignores unmapped
> > page cache. If a workload does a lot of read/write or map-access-unmap
> > operations, we won't be able to even roughly estimate its wss.
>
> You can catch that in mark_page_accessed on those paths, though.
Actually, the problem here is how to find an unmapped page cache page
*to mark it idle*, not to mark it accessed.
Ah, yes.
When I tried that I was still scanning memory by address at the end just to compute such totals - but I did not have to do rmap at that point anymore.
It did look incredibly lame, though.
--
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
A program is never fully debugged until the last user dies.