lkml.org 
[lkml]   [2012]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRE: [PATCH 2/5] vmevent: Convert from deferred timer to deferred work
    Date
    > -----Original Message-----
    > From: ext Anton Vorontsov [mailto:anton.vorontsov@linaro.org]
    > Sent: 08 June, 2012 10:59
    ...
    > a) Two more context swtiches;
    > b) Serialization/deserialization of /proc/vmstat.
    >
    > > It also will cause page trashing because user-space code could be pushed
    > out from cache if VM decide.
    >
    > This can solved by moving a "watcher" to a separate (daemon) process, and
    > mlocking it. We do this in ulmkd.

    Right. It but it has drawbacks as well e.g. ensure that daemon scheduled properly and propagate reaction decision outside ulmkd.
    Also I understand your statement about "watcher" as probably you use one timer for daemon.
    Btw, in my variant (memnotify.c) I used only one timer, it is enough.
    \
     
     \ /
      Last update: 2012-06-08 11:02    [W:0.023 / U:29.036 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site