On Mar 7 2007 08:19, linux-os (Dick Johnson) wrote: > >Later versions of the kernel lock the kernel when an ioctl() is >entered. This means that if you sleep in the ioctl(), nothing >will get scheduled.
Later versions of the kernel also have an ->unlocked_ioctl method, which is probably better than below's approach [which is akin to FreeBSD's DROP_GIANT/PICKUP_GIANT]. >You can do the following (possibly unsafe) in your ioctl(): > > int locked = kernel_locked(); > > ......... code > ......... code > > if(locked) // Before sleeping section > unlock_kernel(); > .......... sleeping code > if(locked) // After sleeping section > lock_kernel(); > > Jan -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
