On 11/17, Paul E. McKenney wrote:
>
> Oleg, any thoughts about Jens's optimization? He would code something
> like:
>
> if (srcu_readers_active(&my_srcu))
> synchronize_srcu();
> else
> smp_mb();
Well, this is clearly racy, no? I am not sure, but may be we can do
smp_mb();
if (srcu_readers_active(&my_srcu))
synchronize_srcu();
in this case we also need to add 'smp_mb()' into srcu_read_lock() after
'atomic_inc(&sp->hardluckref)'.
> However, he is doing ordered I/O requests rather than protecting data
> structures.
Probably this makes a difference, but I don't understand this.
Oleg.
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
