On Wed, 28 Oct 2015 03:45:50 +0100
Arnd Bergmann wrote:
> As far as I can tell, there is a preexisting race condition
> regarding the cmd->use_events flag, which is not protected
> by any lock. When this flag is toggled while another command
> is being started, that command gets stuck until the m
Hi Arnd,
Since we want to make counting semaphores go away,
Why do we want to make counting semaphores go away? completely?
or just for binary use cases?
I have a use case in iser target code where a counting semaphore is the
best suited synchronizing mechanism.
I have a single thread handli
The mthca and mlx4 device drivers use the same method
to switch between polling and event-driven command mode,
abusing two semaphores to create a mutual exclusion between
one polled command or multiple concurrent event driven
commands.
Since we want to make counting semaphores go away, this
patch
