On Sat, Jun 09, 2012 at 12:11:36AM +0900, J.Hwan Kim wrote: > Hi, everyone > > Is memcpy a system call? > > Thanks in advnace, > > Best Regards, > J.Hwna Kim "strace" is a good tool to find out which system calls a program is doing. To answer your question, I don't think it makes much sense to implement memcpy as a syscall, because entering kernel mode is usually relatively expensive and I can't think of any kernel mode-only memcpy optimizations (and optimizations are the only reason to do a user space memcpy in kernel space I can think of). HTH, Jonathan Neuschäfer _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
