On Sun, Dec 22, 2013 at 03:58:55PM +0100, Marin Ramesa wrote:
+simpleroutine futex_rpc(
+ thread : thread_t;
+ address : pointer_t;
+ value : int;
+ operation : int);
+
+simpleroutine futex_wait_rpc(
+
On 12/24/2013 11:41:40 AM, Richard Braun wrote:
Obviously, you rushed your work without trying to understand what you
were doing, and this is becoming frustrating. Don't blindly and
mindlessly copy the first thing you see around...
1/ A simpleroutine is a one-way RPC, without a return value
I noticed this while testing the futex call. I don't know
how to fix this. The code to reproduce this is the
following:
extern int task_create();
struct task;
typedef struct task *task_t;
extern task_t kernel_task;
int main(void)
{
task_t new_task;
task_create(kernel_task, 0,
Marin Ramesa, le Tue 24 Dec 2013 13:26:35 +0100, a écrit :
extern task_t kernel_task;
Where is this supposed to come from?
int main(void)
{
task_t new_task;
task_create(kernel_task, 0, new_task);
If kernel_task is not properly initialized, it is not really surprising
that you
On Tue, Dec 24, 2013 at 12:52:23PM +0100, Marin Ramesa wrote:
I need to start somewhere. I really want to learn how kernels are
programmed.
This task was listed in the small hacks entry, I really thought it
would be a
small hack.
That's probably a mistake on our part.
There is a one call
On 12/24/2013 03:25:15 PM, Richard Braun wrote:
There is a one call to vm_map lookup to retrive the offset and the
object. Simple
How do you implement cross address space synchronization ?
I use a recursive futex_wake(). It first scans all the futexes if
they are on the same offset and if
On Tue, Dec 24, 2013 at 04:55:47PM +0100, Marin Ramesa wrote:
I use a recursive futex_wake(). It first scans all the futexes if
they are on the same offset and if they share the same vm_object.
If they do, recursion is used to wake a number of threads in those
futexes. The number of threads
On 12/24/2013 05:20:41 PM, Richard Braun wrote:
On Tue, Dec 24, 2013 at 04:55:47PM +0100, Marin Ramesa wrote:
I use a recursive futex_wake(). It first scans all the futexes if
they are on the same offset and if they share the same vm_object.
If they do, recursion is used to wake a number of
On Tue, Dec 24, 2013 at 05:38:59PM +0100, Marin Ramesa wrote:
I have read in Futexes are tricky that futex() is used with INT_MAX
argument. I want to keep that usage. So, if a number of threads to
wake is greater than number of threads in a futex I wake all.
And it also says everything else
