Displaying 4 results from an estimated 4 matches for "set_pending".
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2014 May 21
0
[RFC 08/07] qspinlock: integrate pending bit into queue
...nging the rest)
+ while (!(val & (_Q_PENDING_MASK | _Q_TAIL_MASK))) {
+ old = atomic_cmpxchg(&lock->val, val, val | _Q_PENDING_MASK);
+ if (old == val) {
+ *pval = val | _Q_PENDING_MASK;
+ return 1;
+ }
+ val = old;
+ }
+ *pval = val;
+ return 0;
+}
+
+// here
+static inline void set_pending(struct qspinlock *lock, u8 pending)
+{
+ struct __qspinlock *l = (void *)lock;
+
+ // take a look if this is necessary, and if we don't have an
+ // abstraction already
+ barrier();
+ ACCESS_ONCE(l->pending) = pending;
+ barrier();
+}
+
+// and here
+static inline u32 cmpxchg_tail(struct qsp...
2014 May 14
2
[PATCH v10 03/19] qspinlock: Add pending bit
2014-05-14 19:00+0200, Peter Zijlstra:
> On Wed, May 14, 2014 at 06:51:24PM +0200, Radim Kr?m?? wrote:
> > Ok.
> > I've seen merit in pvqspinlock even with slightly slower first-waiter,
> > so I would have happily sacrificed those horrible branches.
> > (I prefer elegant to optimized code, but I can see why we want to be
> > strictly better than ticketlock.)
2014 May 14
2
[PATCH v10 03/19] qspinlock: Add pending bit
2014-05-14 19:00+0200, Peter Zijlstra:
> On Wed, May 14, 2014 at 06:51:24PM +0200, Radim Kr?m?? wrote:
> > Ok.
> > I've seen merit in pvqspinlock even with slightly slower first-waiter,
> > so I would have happily sacrificed those horrible branches.
> > (I prefer elegant to optimized code, but I can see why we want to be
> > strictly better than ticketlock.)
2008 Apr 02
10
[PATCH 0/62] Ocfs2 updates for 2.6.26-rc1
The following series of patches comprises the bulk of our outstanding
changes for Ocfs2.
Aside from the usual set of cleanups and fixes that were inappropriate for
2.6.25, there are a few highlights:
The '/sys/o2cb' directory has been moved to '/sys/fs/o2cb'. The new location
meshes better with modern sysfs layout. A symbolic link has been placed in
the old location so as to