[Webkit-unassigned] [Bug 155255] MemoryPressureHandler doesn't work if cgroups aren't present in Linux

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=155255

--- Comment #15 from Enrique Ocaña <eocanha at igalia.com> ---
(In reply to comment #13)

> > Source/WebCore/platform/linux/MemoryPressureHandlerLinux.cpp:149
> > +        sleep(s_pollingIntervalInSeconds);
> > +    } while (true);
> 
> I'm not happy with this either, but I have no idea how to do this if meminfo
> is not pollable. Note that there's one memory pressure handler per process .

We can use a larger polling interval (5 sec?) and wider memory threshold margins so that we trigger the pressure condition earlier without needing such a high monitoring frequency. Actually, I thing that the current thresholds for remaining memory of 300MB (non critical) and 100MB (critical) are wide enough.

About battery consumption, take into account the relative expense of "opening a text file, parsing its first lines and closing it". What can it be, some milliseconds? I can't believe it's so expensive compared to the huge amount of time (in terms of CPU time scale) that the thread is going to be idle.

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