lkml.org 
[lkml]   [2008]   [Jan]   [15]   [last100]   RSS Feed
Views: [more markup]   [less markup]   [headers]   [forward]  
 
Messages in this thread
/
DateWed, 16 Jan 2008 11:43:08 +0900
FromKOSAKI Motohiro <>
SubjectRe: [RFC][PATCH 3/5] add /dev/mem_notify device
Hi Alan

> > > It also appears there is no way to wait for memory shortages (processes
> > > that can free memory easily) only for memory to start appearing.
> > 
> > poll() with never timeout don't fill your requirement?
> > to be honest, maybe I don't understand your afraid yet. sorry.
> 
> My misunderstanding. There is in fact no way to wait for memory to become
> available. The poll() method you provide works nicely waiting for
> shortages and responding to them by freeing memory.
> 
> It would be interesting to add FASYNC support to this. Some users have
> asked for a signal when memory shortage occurs (as IBM AIX provides
> this). FASYNC support would allow a SIGIO to be delivered from this
> device when memory shortages occurred. Poll as you have implemented is of
> course the easier way for a program to monitor memory and a better
> interface.

OK.
I will challenge implement at mem_notify v5.


- kosaki


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2008-01-16 01:47    [W:0.131 / U:0.680 seconds]
©2003-2008 Jasper Spaans