On Mon, Oct 17, 2005 at 09:16:25AM -0700, Linus Torvalds wrote:
>
> > Absolutely. Keeping a count of (percpu) queued items is basically free if kept
> > in the cache line used by list head, so the 'queue length on this cpu' is a
> > cheap metric.
>
> The only downside to TIF_RCUUPDATE is that those damn TIF-flags are
> per-architecture (probably largely unnecessary, but while most
> architectures don't care at all, others seem to have optimized their
> layout so that they can test the work bits more efficiently). So it's a
> matter of each architecture being updated with its TIF_xyz flag and their
> work function.
>
> Anybody willing to try? Dipankar apparently has a lot on his plate, this
> _should_ be fairly straightforward. Eric?
I *had*, when this hit me :) It was one those spurt things. I am going to
look at this, but I think we will need to do this with some careful
benchmarking.
At the moment however I do have another concern - open/close taking too
much time as I mentioned in an earlier email. It is nearly 4 times
slower than 2.6.13. So, that is first up in my list of things to
do at the moment.
Thanks
Dipankar
-
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]
