shrinking memory consumptions
jg at laptop.org
Mon Apr 2 19:05:17 EDT 2007
OK, just make sigio work on the file ;-).
On Mon, 2007-04-02 at 17:57 -0300, Marcelo Tosatti wrote:
> On Tue, Apr 03, 2007 at 08:34:51AM +1200, Martin Langhoff wrote:
> > On 4/3/07, Adam Jackson <ajackson at redhat.com> wrote:
> > >If you do get back to this, please make it a file, not a signal. Signal
> > >handling is enough of a nightmare intrinsically, and most apps also get
> > Yep, it is hard to do because you have to handle it immediately. If
> > it's a file you can defer it until you get out of that memory-eating
> > loops that's keeping you busy right now... and OOM'ing the box. :-)
> > If that's the case, doing it via signals is the right thing to do, and
> > it _is_ hard. Moving it to a pollable mechanism makes it easier, and
> > of very limited use -- ie: only when your app is idle.
> Thats right - a downside of using files is that the decision of reading
> the file moves down to the application, whereas a signal is an urgent
> mechanism (surely processes can ignore the signal, but that should give
> negative points for them when making the OOM kill decision).
> OTOH Adam's point that what can be done inside signal handlers is
> limited is a good one.
> > Or perhaps I am completely misunderstanding.
> > martin
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