Futex Wait Called

[Aioanei Rares]

pandi k wrote:
> Hi
>
> I am working on fedora core 7, kernel version 2.6.21, gcc version 
> 4.1.2. I have my user space application which communicate with my char 
> driver using write and read system calls. I have a thread in 
> application to send data to driver and concurrently a signal 
> handler(user space) is register. write calls is invoking continuously 
> and read call is also invoking continuously on notification from 
> driver. Here am facing a problem of  "futex_wait"  at one time. Even 
> though my user space application has no mutex locking, FUTEX_WAIT is 
> called and nothing proceeds after this.
>
> I got below lines form strace of my process and always getting lock at 
> same address.
>
> --- SIGRT_15 (Real-time signal 13) @ 0 (0) ---
> futex(0x4aa700b0, FUTEX_WAIT, 2, NULL
>
> please give me some tips to solve this issue or what could be reason 
> for above things. 
>
> if need any more info, i will give u.
>
>
> thanks...
>
> regards,
> pandi.k
Tip numero uno : upgrade to a current/supported version of Fedora.