On Fri, 3 Nov 2017, Chris Metcalf wrote:
> However, it doesn't seem possible to do the synchronous cancellation of
> the vmstat deferred work with irqs disabled, though if there's a way,
> it would be a little cleaner to do that; Christoph? We can certainly
> update the statistics with interrupts disabled via
> refresh_cpu_vm_stats(false), but that's not sufficient. For now, I
Callig quiet_vmstat() gives you the folding of the statistics without
the numa page allocator page cleanup. Leaving some pages in the queues
should not be that much of an issue.
> What about that d*mn 1 Hz clock?
>
> It's still there, so this code still requires some further work before
> it can actually get a process into long-term task isolation (without
> the obvious one-line kernel hack). Frederic suggested a while ago
> forcing updates on cpustats was required as the last gating factor; do
> we think that is still true? Christoph was working on this at one
> point - any progress from your point of view?
Well if you still have the 1 HZ clock then you can simply defer the numa
remote page cleanup of the page allocator to that the time you execute
that tick.
From 1583065471526173767@xxx Fri Nov 03 17:08:01 +0000 2017
X-GM-THRID: 1583065471526173767
X-Gmail-Labels: Inbox,Category Forums,HistoricalUnread