VM: killing process X

[Steve Stavropoulos]

On Fri, 28 May 2004, Christos Ricudis wrote:

> On Fri, 28 May 2004 13:18:51 +0100
> Konstantinos Peletidis <kpeletidis at dsl.pipex.com> wrote:
> 
> > Geia sas,
> > Psaxnontas sto google ema8a pws o kernel, apo tote pou afaire8hke 
> > o OOM killer, an ksemeinei apo virtual memory skotwnei 
> > psilorandomly processes mexri na hremhsoun ta pragmata.
> 
> H alh8eia einai oti de mporei na kanei kai tipote allo. Assume this scenario: 
> 
> * You have 400 mb of virtual memory free
> * You run something.big
> * Now, you suddenly have 1 mb of virtual memory free 
> * You run something small 
> * Something small requests 2 mb of memory
> * OOM killer kills the something small process
> 

 Ayto akribws kanei twra o kernel XWRIS ton OOM killer. O OOM killer 
dialege to proccess me to megalytero size kai skotwne ayto. To problhma 
htan oti mporei na etrexes polla megala programmata, alla to OOM condition 
na dhmiourgiotan apo kati poio mikro, opote na skotwnes megala shmantika
programmata kai meta apo ligo na 3anaeixes OOM. Aytos htan o logos pou ton
bgalan kai afhsan ton kernel na skotwnei opoio proccess paei na zhthsei mnhmh
kai den exei na tou dwsei.


> To senario einai poly syxnotero apo oti fantazesai. Me opoiadhpote logikh kai
> na prospa8hseis na dialekseis TI 8a skotwseis, exeis megalh pi8anothta na
> skotwseis kapoio entelws asxeto process.
> 

 Apo oti diabasa se mia prosfath synentey3h tou Andrea Arcangeli, synh8ws
o offender 8a einai aytos pou 8a zhthsei mnhmh enw den yparxei kai aytos
8a skotw8ei. Opote h parousa katastash xwris OOM killer den prokeite na
dhmiourghsei problhmata stis perissoteres periptwseis. Gia to mellon
skeftontai na metroun to ry8mo me ton opoio kati zhtaei mnhmh kai na
skotwnoun bash aytou, alla yparxoun polla praktika problhmata kai ekei...