In running kernel there are many places you can look to get the usage. But the bottom line is

* You can take a spinlock under a mutex. e.g. mutex_lock--->spinlock-----critical section-----spinunlock--->mutex_unlock.

* You can not take a mutex under a spinlock. e.g. spinlock--->mutex_lock -----critical section ....mutex_unlock---->spinunlock is not allowed.

On Thu, Feb 25, 2016 at 11:37 AM, priyaranjan <priyaranjan45678@gmail.com> wrote:

Hello All,

Do you have any idea of a situation where we would need mutex and spinlock to be locked together? I think there is an example for this in Linux kernel. Can anyone help me?

Regards,
Priyaranjan

_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@kernelnewbies.org
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies

Please don't print this E- mail unless you really need to - this will preserve trees on planet earth.