> i am using vmalloc for allocating memory in my kernel module . i read > about a article poking fun at the usage of vmalloc .. i want > dynamically allocated mem but am not doing something in IRQ or DMA > mode so using vmalloc ... my current kernel number is 2.4.27. any > suggestions on using vmalloc. [ i am using this allocation mostly in > a kthread which is created in 1:1 ratio per request kthread per > request since the processing in a bit long ] > > should i not really use vmalloc ..... please tell !!!! If you don't need the physicalyl contigeous memory, eg. for DMA (IRQ won't need contigeous memory ) or for performace reasons then its prerfectly ok to use vmalloc. Why would you think that it should not be done. As far as kerenel memory space is concerned the region will be in consequetive addresses except that it may not be cosequetive in the pyhsical memory. Also the L3 cache might benifit from physically contigeous acccesses other than a need for dma. So if you are processing large bufferes then you may consider using kmalloc instead. vmalloc in general will have more chance of succeeding in case of memory contention. For more info you can refer to a very well stated discussion in Linux Device Drivers 2nd Edition by Roubinni. (Google LDD and you should get a link).
> Also i want more info on work queues , ( better way to write bh's ) > and some pointer that shows how to use them ... > Again a very good discussion about that can be found in above book Cheers -- BAIN http://abhijit.adotout.net -- ______________________________________________________________________ Pune GNU/Linux Users Group Mailing List: (plug-mail@plug.org.in) List Information: http://plug.org.in/mailing-list/listinfo/plug-mail Send 'help' to [EMAIL PROTECTED] for mailing instructions.
