On Tue, May 18, 2004 at 11:38:28 -0700, prasanna wakhare wrote: > hi, > I'm using two kernel thread one continuously executes > sock_recvmsg and other sends it sontinuosly,ofcource > if i wont put the thread to the sleep the computer > will hang when loading the module containing kernel > thread,i given MSG_DONTWAIT option in sock_recvmsg, > why i had to put the thread to sleep? Do I understand you right, that you called the sock_recvmsg with MSG_DONTWAIT and it did lock up? Ok, now, that's expected behaviour. Consider what MSG_DONTWAIT means. > i'm using 2.4.20-8 kernel is that because the kernel > is not preemptive? > so if i will execute those in 2.6 > will it work? No. 2.6 is only *optionaly* preemptive. Your design is broken anyway. You can't do IO and never wait! > 2.while unloading the same module the kernel gives > oopse saying "unable to handle virtual address at > c0xxxxx address" it will hang somewhere in > kernel_thread_helper in process.c > i google search above but i did not get any threads > plz let me know the reason... Kernel equivalent of "Segmentation fault". ------------------------------------------------------------------------------- Jan 'Bulb' Hudec <bulb@ucw.cz>
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