[lkml]   [2005]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: FUSYN and RT
Sven Dietrich wrote:
>>> /** A fuqueue, a prioritized wait queue usable from
>>kernel space. */
>>> struct fuqueue {
>>> spinlock_t lock;
>>> struct plist wlist;
>>> struct fuqueue_ops *ops;
>>> };
>>Would the above spinlock_t be a raw_spinlock_t? This goes
>>back to my first question. I'm not sure how familiar you are
>>with Ingo's work, but he has turned all spinlocks into
>>mutexes, and when you really need an original spinlock, you
>>declare it with raw_spinlock_t.
> This one probably should be a raw_spinlock.
> This lock is only held to protect access to the queues.
> Since the queues are already priority ordered, there is
> little benefit to ordering -the order of insertion-
> in case of contention on a queue, compared with the complexity.

The choice of lock type should derive from both the calling
context and the length of time the lock is expected to be held.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-04-16 15:14    [W:0.068 / U:6.848 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site