Mutex and Spinlock locked together

[Devesh Sharma]

Hi

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 at 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 at 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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20160225/1c1c8011/attachment.html