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Futex Wait Called
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pandi
Oct 23, 2009, 12:00:48 AM10/23/09
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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 guide me to solve this issue or what could be reason for above
things.
if need any more info, i will give u.
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 guide me to solve this issue or what could be reason for above
things.
if need any more info, i will give u.
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