On Wednesday 29 September 2004 11:19 am, Jihua Cheng wrote: > Hello, > > If the question is out track, please forgive me. I appreciate your kindly > help. > > We are developing a communication product utlizing embedded linux, > filesystem are located in Flash (JFFS2). When linux does data swapping > (swap data from memory to Flash) because of lack of memory, out embedded > linux is very slow. We do not want linux to do memory swapping, could we > increase the size of memory to eliminate the memory swapping? How big the > memory do we need, or how to calculate? > > Besides increasing the memory size, do we have other means to prevent linux > from memory swapping? > > Thanks so much for your kindly help. > > Regards, > > Jihua There is also proc values you can modify. Off the top of my head echo "0" > /proc/vm/swappiness However, from keeping up with LKML, tuning it this way is touchy business and may not prevent swapping altogether. IIRC, some 2.6.x kernel versions had strange(buggy) swap tuning behavior. If in doubt check the LKML archives about swap behavior related to whatever verion you are running and see if there are any known problems. > - > : send the line "unsubscribe linux-net" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- -EB - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
