On Feb 10, 2015, at 12:50 AM, Roshan A <roshan.len@gmail.com> wrote:
hi all,
My question is regarding the correct use of workqueues. I have a driver which queues a work item in the interrupt handler. The bottom half function ( the workitem -function ) does have proper locking ( mutex ) in place for atomicity.
Post the code snippet and why are you using Mutex? If you want to synchronize between Interrupt handler and workqueue then you should use spinlocks.
With this setup, since the interrupts are enabled, it's possible to have a scenario where, when one workitem is being executed, another can be queued up, which results in the workitems being executed in parallel, however since there is a mutex, one thread will sleep.
And precisely the reason not to use mutex locks.
is this particular scenario considered bad or discouraged ?
Now what do you think?
Thank you, -Roshan
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